10.b Martin Marietta AOP - CC Packet
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Date of Meeting: March 18, 2025
To: Honorable Mayor and Members of the City Council
From: T.J. Hofer, Consultant City Planner
Re: Annual Operators Permit (AOP) for Martin Marietta Mine at 22303
Manning Trail
Applicant:
Christina Morrison
Tiller Corporation, a Martin
Marietta Materials, Inc.
Company
Zoning:
Rural Residential - General
(RR-G), Aggregate Mining
Overlay (AM-O), Shoreland
Management Overlay (SM-O)
Owner:
Christina Morrison
Tiller Corporation, a Martin
Marietta Materials, Inc.
Company
Future
Land Use Mining
Location: PID 0703220410001 and nine
others
Review
Deadline: April 8, 2025
The applicant is requesting approval for an Annual Operating Permit for an existing sand and
gravel mining operation.
BACKGROUND
Tiller Corporation, a Martin Marietta Materials, Inc. company (Marietta or applicant), has
applied for its 2025 Annual Operating Permit (AOP) for their existing sand and gravel mining
operation located on Manning Avenue near 225th Street in Scandia. The site has been actively
mined since 1966, and currently operates under Conditional Use Permits (CUP) granted by th e
City on May 20, 2008, with Resolution 05-20-08-02 and 05-20-08-03. The Tiller mine site
previously operated under a CUP issued by Washington County when the County exercised land
use authority within New Scandia Township. Permitted activities included the mining and
processing of aggregate, the production of hot-mix asphalt, and the recycling of concrete and
asphalt products.
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The City’s Mining Ordinance specifies an AOP cycle that coincides with the active mining
season. Applications are due by January 31 each year, to enable permits to be approved before
the start of the mining season later in that year.
The applications for the Scandia Mine Site since 2010 have included both the Tiller site and the
adjacent former Dresel Mine to the southeast. Tiller purchased the Dresel site in 2009. Martin
Marietta acquired Tiller, and subsequentially both sites, in April of 2021 and manages and
maintains the site as a whole. The City issued a CUP for mining and processing at the Dresel site
on May 20, 2008. As the owner of both sites, Marietta is to comply with the conditions of both
the Tiller and Dresel CUPs. Issues and compliance with each are discussed in this report.
Additionally, the City received a concern from an adjacent property owner. The communications
regarding this are attached and staff has provided a review of the concerns and information from
others.
EVALUATION OF REQUEST
The Applicant is requesting an Annual Operating Permit (AOP) for a mining and processing
operation. The permit requirements are governed by Ordinance No. 103, Regulation of Mining
and Related Activities, Chapter 4 of the Development Code. The Ordinance requires review of
the following items for the AOP:
1. The operating conditions of the previous year and conditions required by the CUPs for
the Tiller and Dresel sites.
2. Proposed operating conditions and any variation from the previous year.
3. Results of the annual inspection by the City.
Conditional Use Permit
Tiller Mine Site
The City of Scandia approved a Conditional Use Permit for sand and gravel mining and
processing at the Scandia Mine site for Tiller Corporation on May 20, 2008. Martin Marietta
now owns and operates the site. The conditions included the items noted in the table that follows.
Mariettas’s performance is indicated in the table on the following pages. There were no issues
identified in 2024 for the Tiller Mine site.
Condition
Deadline
Specified in
CUP
Notes
1. Comply with CUP Ongoing In process--monitored by City staff and
consultants
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Condition
Deadline
Specified in
CUP
Notes
2. Comply with Rules and
Regulations Ongoing In process--monitored by City staff and
consultants
4. Permits from CMSCWD None specified
CMSCWD Permit 08-003 for the Tiller
mine remains in effect. The Watershed
District Permit, 08-003, was revised in
2019 to align the permit with the City’s
annual review process and eliminate a 5-
year term on the permit. The revisions to
the permit were approved by District
Managers during their February 13, 2019,
Regular Meeting.
5. Monitoring Wells July 20, 2008
Three required monitoring wells were
installed in 2008. One well was taken out
of service and sealed in 2011 to
accommodate reclamation activities (MW-
2). Monitoring results for the two active
wells in 2024 were provided with the AOP
application and reviewed by LRE Water,
the City’s groundwater consultant.
6. Ground Water
Monitoring July 20, 2008
The Ground Water Monitoring Plan was
approved in the fall of 2008 and revised in
2013. The plan is on file with the City.
In May 2022, Martin Marietta received
authorization from MN DNR to increase its
annual water appropriation from 20 MGY
to 30 MGY for aggregate production and
dust control. With the increased water
appropriation, a short-term monitoring plan
was developed and implemented to help
evaluate aquifer recovery to pre-pumping
water levels following pumping during
periods of high use. Groundwater
monitoring was conducted in 2024. Water
level data is summarized on Table 1 in the
application and reviewed below by LRE
Water.
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Condition
Deadline
Specified in
CUP
Notes
7. Excavation below water
table
May not begin
August 20,
2008
Excavation into the water table began in
2009. The CUP permits mining into
groundwater table to a depth of 50 feet.
Excavation into the groundwater table has
occurred as follows:
2013 — to a depth of 15 to 20 feet
2014 — no mining into groundwater table
2015 — no mining into groundwater table
2016 — to a depth of 15 to 20 feet
2017 — no mining into groundwater table
2018 — no mining into groundwater table
2019 — to a depth of 15 feet
2020 — to a depth of 17 feet
2021 — no mining into groundwater table
2022 — no mining into groundwater table
2023 — to a depth of 15 to 20 feet
2024 — no mining into groundwater table
Excavation into the groundwater table is
expected to occur within the 2025 Potential
Mining Area as depicted on Figure 2, Site
Plan.
Water level data is collected on an ongoing
basis and submitted to the City. Water level
data was submitted with the AOP
application. The review from LRE Water,
water quality consultant for the City of
Scandia, is discussed in this report in the
Groundwater Monitoring section.
8. Production Well Records July 20, 2008
Production well records are being kept by
Marietta and are available to the City.
Water pumped at the site in 2024 was
16,866,244 gallons. The DNR Water
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Condition
Deadline
Specified in
CUP
Notes
Appropriation Permit for the site allows up
to 30 million gallons to be used each year.
28 MGY are approved for washing and 2
MGY are approved for dust control.
9. Ground Water Analysis -
DRO (Diesel Range
Organics) and GRO
None specified
Groundwater samples were analyzed for
DRO. No gasoline is stored on site. If
gasoline storage is added, GRO will be
analyzed.
Groundwater monitoring was conducted in
2024. Water quality data is summarized on
Table 2, included in the application.
Monitoring results were included with the
application and reviewed by LRE Water.
No DRO were detected in the samples in
2024.
10. Map of Index Well Sites July 20, 2008 Map was provided to the City on August
28, 2008.
11. Asphalt Plant Setback
from Lake Ongoing Setback has been maintained, as required
by the CUP.
12. Lake Depth Ongoing
Application indicates that the depth of
excavation will not exceed fifty (50) feet
below the water table, as per the CUP.
Excavation depth to date has been less than
50 feet into the groundwater table through
2024.
13. Truck Signage and
Roadway Cleaning July 20, 2008
Washington County has posted signs on
Lofton and Manning Avenues per their
County requirements. Marietta has posted
signs on 218th Street and Lofton Avenue to
restrict trucks from using 228th Street per
City of Scandia requirements. During
construction season, a “No Engine
Breaking" sign is now being placed on
Manning Trail North near the entrance to
the site to address concerns of engine
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Condition
Deadline
Specified in
CUP
Notes
breaking on the road. Signage was in place
during the City site visit in 2024.
14. Lofton/ Highway 97
Intersection July 20, 2008
Marietta restricts importing add-rock from
Lofton Avenue during non-daylight hours
per the CUP requirements.
15. 228th Street Signage July 20, 2008
Signage is posted at the Lofton Avenue
North exit that restricts trucks from using
228th Street.
16-19. Updated
Reclamation Plan July 20, 2008 Included in application materials; discussed
below.
20. Letter of Credit/Security Due before
AOP approval The financial guarantees are current.
21. AOP Application
Submittal
January 31,
annually
Application was submitted on January 30
2025, with additional information
submitted on February 7, 2025 and
determined to be complete.
Dresel Mine
The City of Scandia approved a Conditional Use Permit for sand and gravel mining and
processing for Dresel Contracting, Inc. on May 20, 2008. Martin Marietta now owns and
operates this site, and therefore must also comply with the conditions of the Dresel CUP. There
were no issues identified in 2024 on the Dresel Mine site.
Condition
Deadline
Specified in
CUP
Notes
1. Comply with CUP Ongoing In process--monitored by City staff and
consultants
3. Comply with Rules and
Regulations Ongoing In process--monitored by City staff and
consultants
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Condition
Deadline
Specified in
CUP
Notes
4. Permits from CMSCWD None specified
CMSCWD Permit 08-003 for the Tiller
mine remains in effect. The Watershed
District Permit, P08-003, was revised in
2019 to align the permit with the City’s
annual review process and eliminate a 5-
year term on the permit. The revisions to
the permit were approved by District
Managers during their February 13, 2019,
Regular Meeting.
5. Monitoring Wells July 20, 2008
Installed in May 2008. The Groundwater
Plan was updated to reflect changes to
monitoring well MW-2 in 2013. The site
complied with the plan in 2024.
6. Revise Proposed
Conditions Plan Pit
Elevations Monitoring
July 20, 2008
The City previously approved a maximum
mining depth of 922 feet AMSL at the
Dresel site, ensuring three feet of
separation between the floor of the mine
and the water table surface during high
water table conditions, based on
monitoring results. LRE Water, water
quality consultant for the City of Scandia,
reviewed the submitted data and made
recommendations which are included in
this report under the Groundwater
Monitoring section.
7. Ground Water
Monitoring Plan July 20, 2008 Approved in October 2008 and on file at
the City.
8. Revise Site Plan include
Index Wells July 20, 2008 Provided to City on August 28, 2008.
9. Identify Bench Mark
Elevation July 20, 2008 Established at top of Well Casing MW-1.
10. Ground Water Analysis
- DRO and GRO None specified
Samples are analyzed for DRO when
mining activity is occurring. No gasoline is
stored on site. If gasoline storage is added,
GRO will be analyzed. No DRO or other
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Condition
Deadline
Specified in
CUP
Notes
contaminants were detected in 2024
monitoring at the Dresel site.
11. Signage on 218th and
Roadway Cleaning Ongoing
Signage was installed and meets the CUP
requirements; signage was in place during
the 2024 site visit.
12. Truck Cleaning Ongoing Trucks must meet requirements for
cleaning, per CUP. No issues were
identified during the 2024 site visit.
13. Delineate Northern
Wetland
None specified Wetland report and delineation completed.
Buffer marked by September 15, 2008.
Complaint received regarding
encroachment into a wetland in late 2014.
Mitigation and replacement plan were
completed and approved by TEP panel and
wetland credits were successfully
withdrawn from the BWSR Wetland Bank
in 2016.
14-17. Updated Reclamation
Plan July 20, 2008
The Reclamation Plan was previously
revised as part of a combined Reclamation
Plan submitted for the Tiller Site.
18. Letter of Credit/Security Before AOP
approval Financial guarantees are current.
21. AOP Application
Submittal
January 31,
annually
Application was submitted on January 30
2025, with additional information
submitted on February 7, 2025 and
determined to be complete.
Proposed Operating Conditions, Deviations from Previous Year, and Ordinance
Requirements – Combined Tiller and Dressel Site
Site Operations - Background Information
The Tiller mine site includes several parcels, as indicated on the Site Plan. Excavation activities
in 2010-2011 removed material between the Tiller site and the former Dresel Mine site, merging
the two sites into one. Marietta mined only the Tiller site in 2024. No mining activities occurred
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on the Dresel site in 2024. The mining operation includes removal of overburden; excavation of
sand and gravel; crushing, washing, screening, stockpiling of sand and gravel; recycling of
concrete and asphalt products; the production of hot-mix asphalt; and reclamation activities. The
overburden is removed from areas to be mined and stockpiled on the site for use in reclamation
activities. The operator brings portable crushing, washing, and screening plants to the site
periodically and these are used to process and stockpile materials. The operator produces and
sells asphalt throughout the construction season and delivers add-rock materials to sites as
needed to produce the required mixes and materials.
Mining into the groundwater table began at the site in 2009. This activity has been described in
the previous mining plans for this site and was evaluated in the Environmental Assessment
Worksheets completed for the Tiller site in 1987 and 1999. The CUP allows mining into the
groundwater to a maximum depth of 50 feet. Mining into the groundwater table occurred in
2013, 2016, 2019, 2020, and 2023 to a depth of 15-20 feet. Mining into the groundwater table
did not occur in 2014, 2015, 2017, 2018, 2021, 2022, or 2024.
The asphalt plant at the site is equipped with a bag-house air pollutant collection device and
operates under a Minnesota Pollution Control Agency (MPCA) Air Emissions Permit. Storage
tanks at the site (for fuel and asphalt cement) are regulated by the MPCA.
The main access routes to and from the site are Manning Avenue (County Road 15) and Lofton
Avenue (County Road 1). Both Manning and Lofton are paved. The haul road from Manning
Avenue is paved through the site to the hot-mix asphalt plant and loading area.
Annual Activity
The application submission included the data required by the ordinance regarding annual activity
on the site, as follows:
2023 2024
Amount of material removed from the
site (in tons) 229,000 287,700
Amount of add-rock brought onto site
(in tons) 44,000 91,660
Recycled asphalt and concrete brought
to the site (in tons) 22,000 24,000
Average number of trips to and from
the site each day (in trips/day) 140 182
The application anticipates that mining and processing will continue at the site in 2025. The level
of activity will depend on market demand for the site’s products. The Site Plan identifies the
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Potential Mining Areas for 2025, which are within the approved mining limits. Potential areas
for reclamation are also identified on the Site Plan. These are discussed later in this report.
Ground Water Monitoring
The approved Groundwater Monitoring Plan for the site is on file with the City. The City’s
groundwater consultant, LRE Water, reviews the groundwater monitoring results each year for
the AOP and provides comments to the City. LRE Water did not note any concerns with the
2025 application as it relates to groundwater quality and quantity. Below are the 2024
Groundwater Monitoring Data Review Comments from LRE Water:
• The 2024 groundwater monitoring was completed in accordance with the approved
monitoring plan.
• Groundwater samples were collected from the monitoring well and piezometers, and
production well and potable well on September 24, 2024, and December 10, 2024. As
required by the monitoring plan, select samples were analyzed for total suspended solids,
ammonia nitrogen, phosphorus, and Diesel Range Organics (DRO). DRO was not
detected above the method detection limit in any of the samples. These rand the other
analyte results indicate no groundwater quality concerns. The pond was not sampled due
to ice cover.
• The groundwater flow direction across the site is generally to the north and is consistent
with previous data.
• From October 2023 through April 2024, groundwater levels across the site showed
continued to decrease and following the same general trend that has been observed since
the fall of 2020. From April 2024 through August 2024, levels increased by
approximately 1 foot, then decreased a slight amount over the last few months of the
year. The water level changes result from local and regional changes in precipitation and
are unrelated to mining operations and pumping the production well. This is shown by
the annual precipitation data that is plotted with water levels on the attached hydrograph
(Figure 1). The water levels and precipitation show similar trends over time.
Figure 1 is included in the attachments for this staff report.
In 2022, the applicant received an increase from the MNDNR to allow the groundwater
appropriations to be increased from 20 million galls per year (MGY) to 30 MGY. LRE Water
noted the production well pumped approximately 17 million gallons in 2024, which is below the
permitted amount of 30 million gallon per year.
Recommendations provided by LRE Water include the following:
• Continue the annual sampling for water quality parameters as outlined in the
monitoring plan.
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• Continue to map the area(s) of excavation into the water table.
• Provide the approximate maximum depth of excavation below the water table during
the 2025 operation year.
Operating Conditions - Mining Ordinance Requirements, Section 7
1. Setbacks
The AOP application indicates that the minimum setbacks are maintained as follows:
• 50 feet from the adjoining property line
• 200 feet from any existing occupied structure not owned by operator or owner
• 100 feet from residential property subdivided into lots of 5 acres or less
• 100 feet from any road right-of-way
The setbacks meet the requirements of Chapter 154 7.1 Setbacks. The City’s 2024
inspection indicated that the setbacks were maintained and still meet City requirements.
2. Fencing
The application indicates that the majority of the site is fenced with 3-strand wire
fencing, except where prohibited due to topography, heavy vegetation, and wetlands.
There are locking metal gates at both entrances. The fencing meets the intent of the City’s
Ordinance. City staff reviewed the fencing during the site visit in 2024 and verified that it
meets the requirements of the Ordinance and CUP.
3. Hours of Operation
The site is operated from 7 am to 7 pm Monday through Friday, except holidays. The
applicant is required to obtain the City’s permission for any extended hours in accordance
with procedures set in Chapter 154, Section 7.3:
“(3) Hours of Operation. Those portions of the mining operation consisting of excavating,
stockpiling, processing, or hauling shall be conducted only between the hours of 7:00
a.m. and 7:00 p.m., Monday through Friday, unless other hours or days of operati on are
specifically authorized by the City.”
Marietta requested, and the City approved, two extended hours requests in 2024. The
requests were for improvement projects on city roads in Dellwood and county roads in
North Branch/Chisago County. In 2023, there were four requests granted. Requests for
extended hours vary from year to year, depending on projects and weather.
4. Screening
The mine is screened from surrounding areas by berms, wooded areas, and farm fields.
Several trees have been planted over the years of the mining operation to augment the
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screening. Processing and stockpiling operations are conducted in recessed portions of
the site to minimize visibility.
5. Dust Control
Major haul roads are hard-surfaced or covered with asphalt millings as dust control
measures. The application indicated that Marietta used a water truck to control dust on
unpaved portions of the site, and calcium chloride was applied to minimize dust
generated by trucking activity. These actions were first implemented in 2019, and have
been continued as needed since then. Marietta plans to continue such practices as needed
in 2025.
6. Noise
The application states that all activities are conducted so as to be in accordance with all
Federal, State and City noise standards. No complaints regarding noise have been
received in 2024.
7. Depth of Excavation
The CUP requires that the depth of excavation shall not exceed fifty feet below the water
table (865 feet above mean sea level) on the Scandia Mine site and may not be lower than
922 feet above mean sea level (amsl) on the former Dresel Mine site. In 2024, excavation
into the groundwater table did not occur.
Excavation into the groundwater table is anticipated in 2025. If excavation into the
groundwater table occurs in 2025, it would occur within the 2025 Potential Mining Area
as depicted on their submitted site plan.
8. Site Clearance
Site clearing activities did not occur in 2024. If clearing activity occurs in 2025, it will
occur within the 2025 Potential Mining Areas as depicted on Figure 2, Site Plan.
9. Appearance/Condition
The City’s site inspection in 2024 confirmed that the site and facilities are maintained in
a neat condition.
10. Sanitary Facilities
The application indicates that the site is served by individual sanitary facilities that meet
the requirements of the City’s Ordinance and the Mine Safety and Health Administration.
City staff inspection confirmed that the City’s requirements were met in 2024.
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11. Waste Disposal
The application indicates that waste generated by the operation is disposed of in
accordance with Federal, State, and City requirements. The City’s site visit in 2024
confirmed that the Applicant is meeting the requirements of the CUP.
12. Water Quality Monitoring Plan
The CUP required that the applicant complete a plan for groundwater monitoring within
60 days of approval of the 2008 CUP (July 20, 2008). The approved groundwater
monitoring plan was completed and is on file at the City. Marietta submitted monitoring
results for 2024 with its application for the 2025 AOP. LRE Water reviewed the
groundwater monitoring activities and found that no DRO (diesel range organics) were
detected in the samples in 2024.
13. Fuel and Chemical Storage
The application describes fuel and chemical storage at the site. The applicant notes that
these materials are stored in accordance with Federal and State standards and County
requirements. On-site fuel storage consists of a 200-gallon above-ground storage tank
which is located within a steel secondary containment area and a 1,000-gallon above-
ground double-walled tank located next to the standby electrical generator. When
processing and/or reclamation crews are present, an additional 1,000-gallon double-
walled tank is brought to the site and used to fuel the respective equipment.
All asphalt cement storage tanks are above-ground. These tanks consist of two 40,000-
gallon tanks and three 32,000-gallon tanks. A 20,000 gallon above-ground used oil
storage tank was removed from the site. All tanks containing asphalt cement are located
within a concrete secondary containment area.
All tanks are registered with MPCA’s Storage Tank Program. MPCA Site ID 51999 is for
the asphalt plant and MPCA Site ID 55016 is for the sand and gravel operation. City staff
reviewed the facilities with Marietta staff at the 2024 site visit.
Small amounts of chemicals utilized by the QM Lab are regulated by Washington County
under the United States Environmental Protection Agency (EPA) rules. EPA ID Number
MND 981 953 417 has been issued for the site which is classified as a Very Small
Quantity Generator.
14. Contingency Response Plan
The application indicates that the site operates under a Spill Prevention, Control and
Countermeasure Plan (SPCC) Plan that was submitted and is on file at the City. The
applicant notes that the mine operator will comply with other such reasonable
requirements that the City may find necessary to adopt for the protection of health, safety
and welfare and/or prevention of nuisance.
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15. Processing
The CUP application describes the operation of permanent processing equipment on the
site and indicates that the equipment is operated in accordance with Federal, State, and
City air quality, water quality, and noise standards. The equipment is screened from view
from other properties and adjacent roads. The CUP requires that the asphalt plant and
related structures be set back at least 100 feet from the shore of the proposed lake on the
site. The site visit in 2024 verified that the processing facilities meet the setback
requirements of the CUP, and no violations of permits were reported in 2024.
16. Recycling
Recycling at the site is permitted by Chapter 154. Asphalt production used approximately
30,000 tons of recycled asphalt products (RAP) in 2024. 24,000 tons of RAP was brought
into the site in 2024; at year-end there were 71,000 tons of RAP on the site. Processed
RAP is used in asphalt production and recycled concrete is sold in various aggregate
products.
A Solid Waste Storage Facility license that authorizes the storage of unprocessed
concrete, concrete products, and brick and a Recycling Facility license that authorizes the
storage and processing of recycled asphalt products are issued to Marietta by Washington
County. General and Specific Conditions are established for each license and are
reviewed on an annual basis and may include an annual inspection completed by the
County.
17. Trucking Operations
The application indicates that the site has access to County Road 15 (Manning Trail N.),
County Road 91 (Lofton Avenue N.), and 218th Street North. These are hard-surfaced
roads. The operator reported that the average number of trucks traveling to and from the
site per day in 2024 was approximately 182 trucks per day.
The proposed conditions for the 2025 AOP are the same as those included in previous
AOPs, which require that Marietta inform all contractors about the following
requirements related to trucking operations, and monitor compliance with the
requirements by all its contractors:
• Engine braking is prohibited in Scandia
• Lofton Avenue is restricted to daytime use only
• Loads are required to be covered
Last year, a “No Engine Breaking” sign was installed on the northbound lane of Manning
Trail North near the entrance to the site to alert truck drivers entering the site. This sign
will be up during construction season and removed during the off-season.
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18. Asphalt Plant
The site operates a permanent hot-mix asphalt plant that was in operation at the time the
City adopted its mining ordinance. The plant operates under an air quality permit issued
by the MPCA and must meet federal, state, and city air, water, and noise standards. The
City received no complaints regarding the operation of the asphalt plant in 2024.
Reclamation Plan - Mining Ordinance Requirements, Section 8
Section 8.2 of Chapter 154 requires the “restoration shall proceed concurrently and proportional
to actual mining operations and will be subject to review and approval at each annual inspection
and the end of the permit period." This section is included in the ordinance to ensure that large
areas of the site are not left in a state that would encourage erosion, dust, and weed establishment
instead of being reclaimed. The mining operation is making an ongoing investment in
reclamation, to avoid potential problems that may occur at the end of the mining operation if a
large investment is needed in reclamation, and the applicant’s resources are limited at that point,
or the applicant abandons the site.
Section 8.4 of the City’s Mining ordinance requires the following for reclamation areas:
• All banks must be graded or backfilled
• Graded or backfilled areas shall be surfaced with soil of a quality at least equal to the
topsoil of areas immediately surrounding, to a depth of at least four inches
• The topsoil shall be planted with trees, shrubs, legumes, or grasses
• Slopes shall not be steeper than 4:1
Reclamation activities in 2024 included placement of overburden material along the mining area
north of the Tiller Mine/Dresel Mine common mining border. The slopes were further stabilized
with seeding and mulching. The completed and ongoing reclamation areas are indicated in
Figure 2, Site Plan.
Ongoing reclamation activities are anticipated north and south of the Tiller Mine/Dresel Mine
common mining border and primarily along the east half of the mining area, during 202 5. These
areas are shown on Figure 2, Site Plan as 2025 Potential Reclamation Activity. Some of the areas
shown as potential reclamation will also see active mining during 2025. Once mining is
complete, reclamation may advance into these areas during 2025.
ANALYSIS
Review Comments
Carnelian-Marine-St. Croix Watershed District Comments
The CMSCWD provided the following comment:
The District Engineer reviewed the summary of 2024 activities and planned 2025
activities. All is in line with previous reviews, conditions of the CMSCWD permit, and
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appears to be in line with Scandia’s CUP and Operating Conditions (confirmation should
be obtained from the City). Mining boundary limits remain unchanged since 2023.
Washington County
Washington County did not provide comment.
Department of Natural Resources
The DNR did not provide comment.
City Engineer
The City Engineer did not provide comment.
Public Works Director
The Public Works Director did not provide comment.
Fire Chief
The Fire Chief did not provide comment.
Site Inspection
City staff completed a site visit to the Martin Marietta Materials, Inc., Scandia Mining Operation
on November 14, 2024, including documenting conditions on the site. The site visit reviewed
activities and site conditions based on the CUP and 2024 AOP and discussed expected activity in
2025.
RECEIVED COMPLAINT
Background
The City was contacted by Jon Lindel, 11240 218th St N, who’s property abuts the southwest
border of the mine, on December 21, 2024, regarding concerns about impacts to their property as
a result of the mining activity on the Marietta site. City Administrator Morell and City Planner
Hofer met with Lindel on January 30, 2025, to discuss Lindel’s concerns. At the time staff asked
Lindel to submit their concerns in writing to be included in the report for the 2025 AOP
application. General concerns from Lindel were received on February 3, 2025, with more
specific concerns being submitted to the City on February 26, 2025. Both of these are attached to
this report. The specific concerns submitted on February 26, 2025, are:
1) What is the depth of excavation measured from the ground level at the common
border for Tiller and adjacent property of Lindell and to the bottom of the created lake on
Tiller property directly north of the Tiller/Lindell border?
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2) Item 12 of the AOP discusses water monitoring. What is the extent of
groundwater level monitoring? Provide historical groundwater depth that Tiller monitors
near the Tiller/Lindell border.
3) Provide details, including a summary of PCA investigation of Tillers chemical
contaminations in the Tiller mine in the past.
4) Explain the Washington County response to Tiller’s request to excavate into the
groundwater prior to Scandia becoming a city when regulatory oversight changed.
Include dates and decisions by Washington County in text. Confirm whether Washington
County prohibited excavation into the groundwater.
5) Provide an ariel photo of the Lindell pond that is current as of 2024 that includes
the Tiller boundary with Lindell property. This photo should be in color and represent the
same mapping as was shown in Tiller’s March 10, 2022 response to Lindell email. This
is identified as Item 1 of Tiller’s response, which is an aerial photo through Washington
County dated 2020.
Staff requested clarification from Lindel, email attached, and provided information to Lindel as it
was available as part of the AOP submittal. This information included Figure 2 Site Plan (that
shows monitoring wells) and Table 1 Scandia Groundwater Elevation Data from the January 30,
2025, submittal. These concerns were forward to Marietta on March 3, 2025.
Marietta has provided a response to the concerns which is attached and copied below:
1. The depth of excavation from the ground level at the common border of Tiller and
Lindell property to the lake is approximately 80 feet and the depth of excavation to
the bottom of the created lake has varied from between 15 ft and 50 ft feet below the
water table during years when mining below the water table has occurred.
2. The water level monitoring network consists of five (5) wells and one (1) staff gauge
located in the on-site pond. The water levels are collected monthly while operating
and are provided in the annual report to the City. The groundwater level data has been
reported since 2006 and includes 19 years of data to-date. The closest water level
monitoring point to the Tiller/Lindell border would be well “MW-1” which is
approximately 850 linear feet to the east of the Lindell border.
3. Tiller operates its’ mining sites with a great deal of corporate responsibility. Tiller has
substantial safeguards built into its’ operations as a result of the various permitting
requirements and company polices. Safeguards include proper storage and handling
of fuels, equipment maintenance protocols, spill prevention, spill response and
reporting policies, maintaining a spill clean-up kit, and on-going routine employee
training. All of this is documented in the Spill Prevention Control and
Countermeasure Plan (SPCC) for the Site.
The reason so many safeguards are in place is that we are operating in areas where
18 | P a g e
sand and gravel are present. Sand and gravel are permeable materials. The equipment
operating at our various sites is mechanical in nature. Equipment contains and
operates on petroleum products including fuels, hydraulic oils and lubricating oils. It
is known that mechanical equipment can breakdown or fail. In certain instances, these
breakdowns or failures may cause a petroleum release. For this reason, Tiller is very
diligent about having our SPCC Plans, safeguards, and training up-to-date and in
place.
During any given year, we will have hundreds of pieces of equipment operating and
thousands of customer trucks visiting our various sites. Company-wide, any spills of
five gallons or more of petroleum products or any volume of hazardous materials are
reported to the State Duty Officer as required by applicable State statutes and
regulations (Minn. Stat. 299K).
There have not been any Minnesota Pollution Control Agency investigations of the
Tiller Site in the 2000’s. If a reportable spill occurs, it is reported to the Minnesota
State Duty Officer and cleaned-up in accordance with the rules.
The groundwater quality data collected to-date indicates that there has not been any
contamination or degradation of groundwater.
4. The Conditional Use Permit (CUP) issued by Washington County that was in effect
prior to Scandia’s incorporation as a city set a maximum excavation depth above the
groundwater because the mining phases that were active at that time had not yet
extended to the groundwater table. The County issued five-year permits and the 2005
CUP application supplied by Tiller included mining below the groundwater table. The
Site had undergone two environmental assessment worksheets (EAW) in the past and
mining into the unconfined aquifer was evaluated during both processes. The County
followed-up with additional review which resulted in an extension to the permitting
process such that the additional review intercepted the timeline in which New Scandia
Township incorporated as a City in 2007 and became the permitting authority of the
Site. In 2008, the City of Scandia issued a CUP to Tiller which based on the results of
the EAW allowed mining below the groundwater table.
Washington County does not prohibit excavation into the groundwater. The
Washington County Development Code, Chapter Seven Mining Regulations, Section
5.5 Protection of Water Tables states that, “Excavation into unconfined (emphasis
added) aquifers must be closely monitored and conducted according to the conditions
of the permit.” The County and the City both allow mining into unconfined aquifers.
In addition, they both prohibit excavation into confined aquifers. Excavation into the
groundwater at the Scandia Site is taking place in an unconfined aquifer.
5. Please find the requested aerial photo, an updated Washington County Drought
Monitoring Report, as well as the March 10, 2022 response.
19 | P a g e
The applicant has also submitted information regarding precipitation levels in the area that
correlate with a decrease in water levels of surface water, with drought conditions being seen in
most of the last four years. Additionally, a letter from the applicant from March 10, 2022,
addressing similar concerns was submitted by the applicant.
Lindel submitted another statement that is attached on March 7, 2025, which is attached. In the
statement they recommended the following:
1) Deny the AOP request to excavate any further into the groundwater. This would be
consistent with Washington County Board's previous mining restrictions when it
approved mining operations prior to when Scandia became a city and took over review
and approval of mining operating conditions.
2) Require that Tiller respond and cooperate with inquiries from Jon Lindell and other
parties including the DNR.
3) Increase the mining setback requirement from all adjoining properties to 200 feet.
4) Require that Tiller and/or its successor Martin Marietta provide a water restoraration
plan that restores water levels to the Lindell pond prior to when excavation into the
groundwater was requested and permitted by the Scandia Council.
A statement regarding groundwater flow was also submitted by Lindel.
Staff Analysis
Staff reached out to the DNR and the South District Hydrologist Supervisor informed the City
that the DNR has been in contact with Lindel over the last several months. The DNR informed
Lindel that:
1) DNR does not regulate mining activity, so we cannot regulate mine operations that
may decrease watershed runoff into his pond, and 2) DNR conducted a standard desktop
review, and found no evidence that the low pond water levels were related to the DNR-
authorized appropriation of groundwater at the mine site.
We recently committed to Mr. Lindel that the DNR will conduct a more detailed
hydrogeologic investigation of his complaint. The DNR has a significant queue of
groundwater investigations; we estimate it will be about 1+ years before we can
investigate it further.
If there is a documented issue from a qualified professional that shows a detrimental impact to
Lindel’s property, enforcement from the City would include amendments to or revocation of the
CUP. Based on the statement from the DNR, there is no evidence that the water level of the pond
on Lindel’s property and the mining activities from Marietta are correlated.
Protection of groundwater is required per 5.6 of the Mining Ordinance:
20 | P a g e
The maximum depth of excavation shall be established so that groundwater quality and
quantity are protected. This depth of excavation shall be established by the City and will
be based, in part, upon soil characteristics, depth to groundwater, nature of mi ning
proposed, and local use of the aquifer. Mining shall not be allowed in confined aquifers.
Excavation into unconfined aquifers must be closely monitored and conducted according
to the conditions of the permit. Dewatering for the purposes of mining shall not be
allowed. If it is determined in the course of mining that the mining operation has
negatively impacted a well by lowering yields or water quality, the operator of the mine
shall be responsible for providing a new well for the property.
No extraction operations shall be conducted in such a manner as to permanently lower the
water table of surrounding properties or any other water body, wetland, or groundwater
dependent natural resources.
At this time, staff has not received any data, study, or evaluation from a qualified professional
that shows any impact on surround water bodies originating from the Marietta site. Washington
County’s prior determinations are not required to be reviewed as they relate to the determinations
of the City of Scandia as a separate entity. The mining setback is consistent with the approved
plans and the Mining Ordinance, therefore there is no rational basis for an increase. A restoration
plan for an offsite location from the mining site would only be a reasonable condition for the
City to apply if there was documented impacts from a qualified professional showing that
Marietta was responsible for the water levels of a surrounding water body being reduced.
At this time, nothing has been observed by or submitted to the City that would indicate a
violation of the conditions of the original approvals or the reoccurring AOPs for the site. Staff
recommends that the Council not take Lindel’s recommendation to deny the AOP because the
DNR has not found evidence that the low pond water levels were related to the DNR-authorized
appropriate of groundwater at the mine site, the applicant currently maintains a permit with the
CMSCWD, and the City’s consultant from LRE has stated that the groundwater levels are
consistent and should continue to be monitored.
Additionally, Lindel’s property appears to be located in the “Potential 2025 Reclamation” area of
the submitted site plan. When the site is reclaimed, mining will no longer take place in the
property that abuts Lindel’s property and a number of the concerns expressed by them may be
addressed.
If the Council wishes staff to further review the concern, Council should provide direction as to
how to move forward. Staff believes the future hydrogeologic investigation that the DNR has
described will be important to review as it relates to the concern.
ACTION REQUESTED
The City Council can:
1. Approve the AOP, with or without conditions
21 | P a g e
2. Deny the application if it is found that the request is not consistent with the
Comprehensive Plan, CUP, AOP Criteria, and Mining Ordinance
3. Table the request if the Council needs additional information to make its decision
STAFF RECOMMENDATION
Staff recommends approval of the Tiller Corporation, a Martin Marietta Materials, Inc. 2025
AOP for sand and gravel mining and related processing at the Scandia Mine, 22303 Manning
Avenue North, with the following conditions:
1. The applicant shall comply with the conditions of the Conditional Use Permit for
sand and gravel mining and processing at the Scandia Mine site approved on May 20,
2008.
2. The applicant shall comply with site operation hours of 7 a.m. to 7 p.m. Monday
through Friday, except holidays, unless the applicant requests and receives the City’s
permission for extended hours in accordance with procedures set forth in Chapter
154.
3. The applicant shall continue to observe groundwater levels during the year. If levels
continue to rise, there is the potential for the water table surface to be above the depth
of the excavation and outside of the limits of the proposed lake. If this occur s, maps
submitted for the 2026 AOP shall identify the general areas where excavation depth is
below the water table.
4. The applicant shall continue to map the area(s) of excavation into the water table and
provide said map as part of the AOP application.
5. The applicant shall provide the approximate depth of the excavation below the water
table in future annual reports to confirm the excavation did not go below the 865.87
feet amsl threshold.
6. The applicant shall continue to provide the production well records for the site to the
City so the pumping records can be compared to past and future groundwater level
trends at the site. The applicant should measure the water level in the production well
under non-pumping conditions during monitoring periods.
7. Requests for operating hours or haul routes outside those specified in the Conditional
Use Permit shall be accompanied by a proposed truck haul route for approval by staff.
8. The applicant shall inform its contractors about the following requirements related to
trucking operations, and monitor compliance with the requirements by all its
contractors:
a. Engine braking is prohibited in Scandia
b. Lofton Avenue is restricted to daytime use only
22 | P a g e
c. Haul loads are required to be covered
9. The applicant shall regularly monitor the entrances and exits to the site, and work
with their hauling contractors and truck drivers to maintain compliance with traffic
laws.
10. The reclamation activities shall meet the requirements of the Conditional Use Permit,
including soil and planting requirements.
11. If the applicant has knowledge that a crash or traffic violation occurs involving a
truck hauling for Marietta, Marietta shall contact the City to report the incident
immediately. The applicant shall report actions it will take to respond to the incident.
12. The applicant shall pay all fees and escrows associated with this application.
13. This Annual Operating Permit shall expire on March 31, 2026.
Staff recommends the following motion:
Motion to recommend approval of the attached resolutions to approve an Annual
Operating Permit the Martin Marietta Mine, with findings and conditions as described by
staff within the staff report.
Attachments
A. Resolution 03-18-25-05 Approving the AOP for Martin Marietta Mine
B. Location Map
C. Application
D. Applicant’s Narrative
E. Comments from David Hume of LRE Water
F. Questions submitted by Jon Lindel, 11240 218th St N
G. Response submitted by Christina Morrison, Martin Marietta dated March 13, 2025
CITY OF SCANDIA
RESOLUTION NO. 03-18-25-XX
RESOLUTION APPROVING THE 2025 ANNUAL OPERATING PERMIT
FOR THE SAND AND GRAVEL MINE AND PROCESSING FACILITY AT
THE SCANDIA MINE SITE
WHEREAS, Tiller Corporation, a Martin Marietta Materials, Inc. Company, operates a sand
and gravel mining and processing operation and asphalt hot-mix plant located on
approximately 435 acres at Manning Avenue North, on property legally described as:
See Attachment A; and
WHEREAS, the site has been actively mined since 1966, and has operated under a previous
Conditional Use Permit granted by Washington County, when the County exercised land use
authority within New Scandia Township. Permitted activities include the mining and processing
of aggregate, the production of hot-mix asphalt, and the recycling of concrete and asphalt
products; and
WHEREAS, an Environmental Assessment Worksheet (EAW) was prepared for this mining
facility in 1987, a second EAW was completed in 1999 for a proposed expansion of the facility;
and
WHEREAS, the scope of operations and mining limits proposed in the current permit
application to the City are consistent with the scope of the operations and mining limits reviewed
in the 1999 EAW; and
WHEREAS, Chapter 154 of the City Code (hereinafter referred to as “the ordinance”), otherwise
known as Ordinance No. 103, Chapter 4 of the Development Code of the City of Scandia,
Minnesota, adopted September 20, 2022 replaced the requirements of the ordinances adopted by
the City of Scandia on August 28, 2007, which replaced the ordinances adopted by Washington
County and the former New Scandia Township and required the issuance of a new Conditional
Use Permit and Annual Operating Permits for continued operation of existing mining operations;
and
WHEREAS, the City approved a Conditional Use Permit for the mining and processing
operations on May 20, 2008; and
WHEREAS, Tiller Corporation, Inc. submitted an application for an Annual Operating Permit
to the City of Scandia, which was found to be complete for review; and
WHEREAS, the Scandia City Council reviewed the application at its regular meeting on March
18, 2025.
NOW, THEREFORE, BE IT HEREBY RESOLVED BY THE CITY COUNCIL
OF THE CITY OF SCANDIA, WASHINGTON COUNTY, MINNESOTA, that the
Annual Operating Permit for Tiller Corporation for a sand and gravel mine and processing
facility at the Scandia mine site is approved, subject to the following conditions:
1. The applicant shall comply with the conditions of the Conditional Use Permit for
sand and gravel mining and processing at the Scandia Mine site approved on May 20,
2008.
2. The applicant shall comply with site operation hours of 7 a.m. to 7 p.m. Monday
through Friday, except holidays, unless the applicant requests and receives the City’s
permission for extended hours in accordance with procedures set forth in Chapter
154.
3. The applicant shall continue to observe groundwater levels during the year. If levels
continue to rise, there is the potential for the water table surface to be above the depth
of the excavation and outside of the limits of the proposed lake. If this occur s, maps
submitted for the 2026 AOP shall identify the general areas where excavation depth is
below the water table.
4. The applicant shall continue to map the area(s) of excavation into the water table and
provide said map as part of the AOP application.
5. The applicant shall provide the approximate depth of the excavation below the water
table in future annual reports to confirm the excavation did not go below the 865.87
feet amsl threshold.
6. The applicant shall continue to provide the production well records for the site to the
City so the pumping records can be compared to past and future groundwater level
trends at the site. The applicant should measure the water level in the production well
under non-pumping conditions during monitoring periods.
7. Requests for operating hours or haul routes outside those specified in the Conditional
Use Permit shall be accompanied by a proposed truck haul route for approval by staff.
8. The applicant shall inform its contractors about the following requirements related to
trucking operations, and monitor compliance with the requirements by all its
contractors:
• Engine braking is prohibited in Scandia
• Lofton Avenue is restricted to daytime use only
• Haul loads are required to be covered
9. The applicant shall regularly monitor the entrances and exits to the site, and work
with their hauling contractors and truck drivers to maintain compliance with traffic
laws.
10. The reclamation activities shall meet the requirements of the Conditional Use Permit,
including soil and planting requirements.
11. If the applicant has knowledge that a crash or traffic violation occurs involving a
truck hauling for Tiller, Tiller shall contact the City to report the incident
immediately. The applicant shall report actions it will take to respond to the incident.
12. The applicant shall pay all fees and escrows associated with this application.
13. This Annual Operating Permit shall expire on March 31, 2026.
FURTHER, BE IT RESOLVED, that any significant variation from these plans and
conditions of approval shall require an application to amend this Annual Operating Permit.
Whereupon, said Resolution is hereby declared adopted on this 18th day of March 2025.
Steve Kronmiller, Mayor
ATTEST:
Kyle Morell, City Administrator
Attachment A
Section 1.
The Southeast 1/4 of Section 7, in Township 32 North, of Range 20 West; and that part of the
Southwest 1/4 of the Southwest 1/4 of Section 8, in Township 32 North, of Range 20 West,
described as follows:
Commencing at a point in the North line of said Southwest 1/4 of the Southwest 1/4 of said
Section 8, 22 rods East of the Northwest corner thereof, thence West along said North line to
the Northwest corner of said Southwest 1/4 of the Southwest 1/4, thence South along the West
line of said Southwest 1/4 of the Southwest 1/4 to the Southwest corner thereof, thence East
along the South line of said Southwest 1/4 of the Southwest 1/4 a distance of 42 rods to a point,
thence Northwesterly in a straight line to the point of beginning; and also a strip of land 2 rods
wide on the North side of said Southwest 1/4 of the Southwest 1/4, commencing 22 rods East of
the Northwest corner thereof and extending to the Northeast corner thereof.
That part of the South Half of the Northeast Quarter of Section 7, Township 32 North, Range 20
West, Washington County, Minnesota, described as follows:
Commencing at the Northwest corner of said South Half; thence Easterly along the North line
of said South Half a distance of 1223.40 feet to the point of beginning; thence Southerly,
parallel with the West line of said South Half, a distance of 1319.60 feet to the South line of
said South Half; thence Easterly along said South line a distance of 1423.65 feet to the
Southeast corner of said South Half; thence Northerly along the East line of said South Half a
distance of 1317.76 feet to the Northeast corner of said South Half; thence Westerly along the
North line of said South Half a distance of 1422.96 feet to the point of beginning. Subject to
228th Street North along North line.
Section 2.
That part of the Southeast Quarter of the Southwest Quarter and of the South Half of the
Northeast Quarter of the Southwest Quarter of Section 7, Township 32, Range 20, Washington
County, Minnesota lying easterly of the centerline of County Road 15A as said centerline is
described in Book 312 of Deeds on pages 19 and 20.
Subject to County Road 15A.
Subject to easements of record.
Section 3.
The North One-Half of the Southwest Quarter (N 1/2 of SW 1/4) and the Southeast Quarter of
the Northwest Quarter (SE 1/4 of NW 1/4) all in Section 8, Township 32, Range 20.
Except: All that part of the Northeast Quarter of the Southwest Quarter (NE 1/4 of SW 1/4) of
Section 8, Township 32, Range 20, Washington County, Minnesota lying East of the centerline
of County State Aid Highway No. 1 (Lofton Avenue).
Section 4.
That part of the Southeast Quarter of the Southwest Quarter (SE 1/4 of SW 1/4) of Section 8,
Township 32, Range 20 lying West of the public highway as the same now runs over and across
said tract, except the North 2 rods thereof; and that part of the Southwest Quarter of the
Southwest Quarter (SW 1/4 of SW 1/4) of Section 8, Township 32, Range 20 described as
follows, to wit:
Beginning 22 rods East of the Northwest corner of said Southwest Quarter of Southwest
Quarter (SW 1/4 of SW 1/4); thence Southeasterly in a straight line to a point 42 rods East of
the Southwest corner of said Southwest Quarter of Southwest Quarter (SW 1/4 of SW
1/4); thence East to the Southeast corner of said Southwest Quarter of Southwest Quarter (SW
1/4 of SW 1/4 ), thence North to the Northeast corner of said Southwest Quarter of Southwest
Quarter (SW 1/4 of SW 1/4), thence West to the point of beginning, except the North 2 rods
thereof said tract.
Except: That part of the North 320.00 feet of the South 620.00 of the Southeast Quarter of the
Southwest Quarter of Section 8, Township 32, Range 20, Washington County, Minnesota, lying
Westerly of the center line of County State Aid Highway No. 1, as the same is now laid out and
traveled, said center line is described as follows:
Beginning at a point on the South line thereof distant 37.30 feet Westerly of the Southeast
comer thereof (for the purposes of this description, the South line of said Southeast Quarter of
the Southwest Quarter is assumed to bear South 89 degrees 38 minutes 18 seconds West);
thence Northerly along a curve concave to the West, having a radius of 2864.81 feet an d a
central angle of 7 degrees 12 minutes 48 seconds, a distance of 360.67 feet, the chord of said
curve bears North 14 degrees 39 minutes 10 seconds West; thence North 18 degrees 15 minutes
34 seconds West, tangent to said curve, a distance of 282.59 feet; thence Northerly along a
tangential curve, concave to the East, having a radius of 1980.97 feet and a central angle of 20
degrees 29 minutes 54 seconds, a distance of 708.72 feet to the North line of said Southeast
Quarter of the Southwest Quarter, and there terminating.
And lying Easterly of the following described line:
Commencing at the Southwest corner of said Section 8; thence Easterly along the South line of
said Section 8, a distance of 1714.61 feet to the point of beginning of the line to be described;
thence Northeasterly, deflecting to the left 83 degrees 54 minutes 52 seconds, a distance of
623.51 feet to the North line of the South 620.00 feet of said Southeast Quarter of the
Southwest Quarter, and there terminating.
Also except: That part of the Southeast Quarter of the Southwest Quarter of Section 8,
Township 32 N, Range 20 W, described as follows: Commencing at the Southwest corner of
said Section 8, thence Easterly along the South line of Section 8 a distance of 17 14.61 feet
which is the point of beginning of this description; thence Northeasterly deflecting to the left 83
degrees 54 minutes 52 seconds a distance of 301.70 feet to the North line of the South 100 feet
of the Southeast Quarter of the Southwest Quarter of Section 8; thence Easterly along said
North line a distance of 757 feet, more or less, to the center line of County State Aid Highway
No. 1; thence Southeasterly along said center line a distance of 305 feet, more or less, to the
South line of Section 8, thence Westerly along said South line a distance of 862 feet, more or
less, to the point of beginning, according to the United States Government Survey thereof and
situate in Washington County, Minnesota,
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Source: Washington County, MNDot
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Feet
City Limits
Parcels
!ILegend
Aerial Map
City of Scandia, Minnesota January 2023
File No._____________
APPLICATION FOR PLANNING AND ZONING REQUEST
City of Scandia, Minnesota
14727 209th Street North, Scandia, MN 55073
Phone 651/433-2274 Fax 651/433-5112 Web http://www.ci.scandia.mn.us
Please read before completing: The City will not begin processing an application that is incomplete. Detailed submission
requirements may be found in the Scandia Development Code, available at the City office and website (www.ci.scandia.mn.us) and in
the checklist forms for the particular type of application. Application fees are due at the time of application and are not refundable.
1. Property Location: (street address, if applicable)
2. Washington County Parcel ID:
3. Complete Legal Description: (attach if necessary)
4. Owner(s):Phone:
(h)
(b)
Street Address: E-Mail:
City/ State: Zip:
5.Applicant/Contact Person:Phone:
(h)
(b)
Street Address (Mailing): E-Mail:
City/ State: Zip:
6.Requested Action(s): (check all that apply)
____ Variance
____ Variance Extension
____ Conditional Use Permit (CUP)
____ CUP Extension
____ CUP/ Open Space Subdivision.
____ CUP/ Planned Unit Development
____ Interim Use Permit (IUP)
____ Annual Operators Permit
____ Administrative Permit
(type)____________________
____ Site Plan Review
(type)____________________
____ Site Plan Modification
____ Site Plan Extension
____ Sign (Permanent)
____ Amendment (Development Code )
____ Amendment (Comp. Plan )
____ Subdivision, Minor
____ Subdivision, Preliminary Plat/Major
____ Subdivision, Final Plat
____ Environmental Review
____ Wetland Review
7. Brief Description of Request: (attach separate sheet if necessary; include Variance Rationale if
necessary)
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
8. Project Name:
I hereby apply for consideration of the above described request and declare that the information and materials
submitted with this application are complete and accurate. I understand that no application shall be considered
complete unless accompanied by fees as required by city ordinance. Applications for projects requiring more than one
type of review shall include the cumulative total of all application fees specified for each type of review. I understand
that applicants are required to reimburse the city for all out-of-pocket costs incurred for processing, reviewing and
hearing the application. These costs shall include, but are not limited to: parcel searches; publication and mailing of
notices; review by the city’s engineering, planning and other consultants; legal costs, and recording fees. An escrow
deposit to cover these costs will be collected by the city at the time of application. The minimum escrow deposit shall
be cumulative total of all minimum escrow deposits for each type of review required for the project, unless reduced as
provided for by ordinance. The city may increase the amount of the required escrow deposit at any time if the city’s
costs are reasonably expected to exceed the minimum amount. Any balance remaining after review is complete will
be refunded to the applicant. No interest is paid on escrow deposits.
PLEASE NOTE: If the fee owner is not the applicant, the applicant must provide written authorization by the fee
owner in order for this application to be considered complete.
Property Fee Owner Signature(s) Date:
Applicant Signature(s) Date:
For City Use Only
Application Fees: _______________________
Escrow Deposit: _______________________
City of Scandia, Minnesota
See 2025 Application for the Annual Operators Permit dated January 2025.
Martin Marietta Sand and Gravel Mining Operation
1/29/2025
ATTACHMENT 1
LEGAL DESCRIPTION
Legal Description for New Scandia Mining Site
Section 1.
The Southeast V4 of Section 7, in Township 32 North, of Range 20 West; and
that part of the Southwest V4 of the Southwest V4 of Section 8, in Township 32
North, of Range 20 West, described as follows:
Commencing at a point in the North line of said Southwest V4 of the Southwest
V4 of said Section 8, 22 rods East of the Northwest corner thereof, thence West
along said North line to the Northwest corner of said Southwest V4 of the
Southwest V4, thence South along the West line of said Southwest V4 of
Southwest V4 to the Southwest corner thereof, thence East along the South line
of said Southwest V4 of the Southwest V4 a distance of 42 rods to a point, thence
Northwesterly in a straight line to the point of beginning; and also a strip of land
2 rods wide on the North side of said Southwest V4 of the Southwest V4,
commencing 22 rods East of the Northwest corner thereof and extending to the
Northeast corner thereof.
That part of the South Half of the Northeast Quarter of Section 7, Township 32
North, Range 20 West, Washington County, Minnesota, described as follows:
Commencing at the Northwest corner of said South Half; thence Easterly along
the North line of said South Half a distance of 1223.40 feet to the point of
beginning; thence Southerly, parallel with the West line of said South Half, a
distance of 1319.60 feet to the South line of said South Half; thence Easterly
along said South line a distance of 1423.65 feet to the Southeast corner of said
South Half; thence Northerly along the East line of said South Half a distance of
1317.76 feet to the Northeast corner of said South Half; thence Westerly along
the North line of said South Half a distance of 1422.96 feet to the point of
beginning. Subject to 228th Street North along North line.
Section 2.
That part of the Southeast Quarter of the Southwest Quarter and of the South
Half of the Northeast Quarter of the Southwest Quarter of Section 7, Township
32, Range 20, Washington County, Minnesota lying easterly of the centerline of
County Road 15A as said centerline is described in Book 312 of Deeds on pages
19 and 20.
Subject to County Road 15A.
Subject to easements of record.
Section 3.
The North One-Half of the Southwest Quarter (N V2 of SW %) and the Southeast
Quarter of the Northwest Quarter (SE % of NW %) all in Section 8, Township 32,
Range 20.
Except: All that part of the Northeast Quarter of the Southwest Quarter (NE %
of SW %) of Section 8, Township 32, Range 20, Washington County, Minnesota
lying East of the centerline of County State Aid Highway No. 1 (Lofton Avenue).
Section 4.
That part of the Southeast Quarter of the Southwest Quarter (SE % of SW %) of
Section 8, Township 32, Range 20 lying West of the public highway as the same
now runs over and across said tract, except the North 2 rods thereof; and that
part of the Southwest Quarter of the Southwest Quarter (SW % of SW %) of
Section 8, Township 32, Range 20 described as follows, to wit:
Beginning 22 rods East of the Northwest corner of said Southwest Quarter of
Southwest Quarter (SW% of SW %); thence Southeasterly in a straight line to a
point 42 rods East of the Southwest corner of said Southwest Quarter of
Southwest Quarter (SW% of SW %); thence East to the Southeast corner of
said Southwest Quarter of Southwest Quarter (SW % of SW % ), thence North to
the Northeast corner of said Southwest Quarter of Southwest Quarter (SW % of
SW %), thence West to the point of beginning, except the North 2 rods thereo(
said tract.
Except: That part of the North 320.00 feet of the South 620.00 of the Southeast
Quarter of the Southwest Quarter of Section 8, Township 32, Range 20,
Washington County, Minnesota, lying Westerly of the center line of County State
Aid Highway No. 1, as the same is now laid out and traveled, said center line is
described as follows:
Beginning at a point on the South line thereof distant 37.30 feet Westerly of the
Southeast corner thereof (for the purposes of this description, the South line of
said Southeast Quarter of the Southwest Quarter is assumed to bear South 89
degrees 38 minutes 18 seconds West); thence Northerly along a curve concave
to the West, having a radius of 2864.81 feet and a central angle of 7 degrees 12
minutes 48 seconds, a distance of 360.67 feet, the chord of said curve bears
North 14 degrees 39 minutes 10 seconds West; thence North 18 degrees 15
minutes 34 seconds West, tangent to said curve, a distance of 282.59 feet;
thence Northerly along a tangential curve, concave to the East, having a radius
of 1980.97 feet and a central angle of 20 degrees 29 minutes 54 seconds, a
distance of 708.72 feet to the North line of said Southeast Quarter of the
Southwest Quarter, and there terminating.
And lying Easterly of the following described line:
Commencing at the Southwest corner of said Section 8; thence Easterly along
the South line of said Section 8, a distance of 1714.61 feet to the point of
beginning of the line to be described; thence Northeasterly, deflecting to the left
83 degrees 54 minutes 52 seconds, a distance of 623.51 feet to the North line of
the South 620.00 feet of said Southeast Quarter of the Southwest Quarter, and
there terminating.
Also except: That part of the Southeast Quarter of the Southwest Quarter of
Section 8, Township 32 N, Range 20 W, described as follows: Commencing at
the Southwest corner of said Section 8, thence Easterly along the South line of
Section 8 a distance of 1714.61 feet which is the point of beginning of this
description; thence Northeasterly deflecting to the left 83 degrees 54 minutes 52
seconds a distance of 301.70 feet to the North line of the South 100 feet of the
Southeast Quarter of the Southwest Quarter of Section 8; thence Easterly along
said North line a distance of 757 feet, more or less, to the center line of County
State Aid Highway No. 1; thence Southeasterly along said center line a distance
of 305 feet, more or less, to the South line of Section 8, thence Westerly along
said South line a distance of 862 feet, more or less, to the point of beginning,
according to the United States Government Survey thereof and situate in
Washington County, Minnesota.
Sunde Engineering, PLLC.
10830 Nesbitt Avenue South • Bloomington, Minnesota 55437-3100
Phone: (952) 881-3344 • Fax: (952) 881-1913 • E-Mail: info@sundecivil.com
January 2025
APPLICATION FOR
2025 ANNUAL OPERATORS PERMIT
Scandia, MN
Consulting Civil Engineers
Martin Marietta Page 1
2025 Annual Operators Permit Application
January 2025
APPLICATION FOR ANNUAL OPERATORS PERMIT
MARTIN MARIETTA
SAND AND GRAVEL MINING OPERATION
CITY OF SCANDIA
WASHINGTON COUNTY, MINNESOTA
January 2025
I. INTRODUCTION
The following Annual Operators Permit (AOP) application is submitted on behalf of Tiller
Corporation, a Martin Marietta Materials, Inc. company (herein collectively referred to as
“Martin Marietta”) in compliance with the City of Scandia’s Ordinance No. 103 and Chapter 4
of the Development Code: Mining and Related Activities Regulations, Section 6, adopted by
the City of Scandia on August 28, 2007.
Martin Marietta acquired Tiller in April 2021. Martin Marietta operates a gravel mining and
processing operation including an asphalt plant within the City of Scandia. The site has been
actively mined since at least 1966. Prior to the incorporation of Scandia in 2006, New Scandia
Township and Washington County were the permitting authorities. The City of Scandia
adopted two resolutions on May 20, 2008 issuing Conditional Use Permits (CUPs) for the site
which is now comprised of the Tiller Mine and Dresel Mine.
II. ANNUAL REPORT
A. Operating Conditions
The site operates in accordance with operating conditions regulated by Section 7 of
Scandia Ordinance 103.
1. Setbacks: No mining, stockpiling or land disturbance activities, with the exception of
screening and reclamation activities, are proposed to take place within the setback
areas. Minimum setback areas are maintained as follows:
a) 50 feet from an adjoining property line
b) 200 feet from an occupied structure existing on May 20, 2008.
c) 100 feet from any contiguous property subdivided into residential lots of 5 acres
or less
d) 100 feet from any road right-of-way.
2. Fencing: The majority of the site is fenced with 3 strand wire fencing except where
prohibited due to topography, heavy vegetation and wetlands. There are locking
metal gates at all entrances to the site.
Martin Marietta Page 2
2025 Annual Operators Permit Application
January 2025
3. Hours of operation: The site is operated from 7:00 a.m. to 7:00 p.m. Monday through
Friday except holidays. Extended hours may be required periodically for situations
such as emergencies, accelerated work schedules or weather delays. In accordance
with procedures set forth in Ordinance No. 103, extended hours were requested and
approved in 2024.
The frequency of extended hours requests varies from year-to-year depending on
the projects. In 2024, Martin Marietta requested extended hours primarily to keep
local CSAH projects on-schedule including the CR-12 project in Mahtomedi. As part
of the request for extended hours, Martin Marietta asked to be notified if the City
received any complaints regarding the extended hours of operations. Martin Marietta
did not receive any notice of complaints from the City or any members of the public
as a result of the extended hours.
4. Screening: Screening berms, wooded buffer areas and agricultural fields separate
the mining activity from surrounding properties. A large number of trees have been
planted in the past to screen site activities. Processing and stockpiling operations
are conducted in recessed portions of the site to minimize visibility.
5. Dust control: Major haul roads are hard surfaced and some roads are covered with
asphalt millings as dust control measures. A water truck is used to water unpaved
portions of the site to control dust. During periods of increased trucking activity,
calcium chloride or other approved dust suppressant is applied to provide additional
dust control. These practices will continue throughout 2025.
6. Noise: All activities are conducted so as to be in accordance with all Federal, State
and City noise standards.
7. Depth of excavation: Depth of excavation will not be lower than 922 feet above mean
sea level (msl) for the property described in Resolution No. 05-20-08-02, approving
the Conditional Use Permit Application of Dresel Contracting for Sand and Gravel
Mining Processing. On the balance of the property, the depth of excavation below
the water table will not be lower than 865.87 feet msl.
8. Site clearance: Site clearing activities did not occur in 2024. If clearing activity occurs
in 2025, it will occur within the 2025 Potential Mining Areas as depicted on Figure 2,
Site Plan.
9. Appearance/condition: All buildings, plants and equipment at the site are maintained
in a neat condition. Weeds and other unsightly or noxious vegetation are controlled
as necessary to preserve the appearance of the reclaimed areas.
10. Sanitary Facilities: The scale and asphalt plant area is served by an individual
sewage treatment system. Portable sanitary facilities are provided in the operating
areas as required by the Mine Safety and Health Administration.
11. Waste Disposal: Waste generated from the operation is disposed of in accordance
with Federal, State and City requirements.
Martin Marietta Page 3
2025 Annual Operators Permit Application
January 2025
12. Water Quality Monitoring: A plan for groundwater monitoring was developed and
approved in conjunction with the CUP permitting process. Groundwater monitoring
was conducted in 2024. Water level data is summarized on Table 1 and water quality
data is summarized on Table 2, included in the back of this application.
13. Fuel and Chemical Storage: All fuel and chemicals stored on site are stored in
accordance with Federal and State standards. On-site fuel storage consists of a 200-
gallon above-ground storage tank located within a steel secondary containment area
and a 1,000-gallon above-ground double walled tank located next to the standby
electrical generator. When processing and/or reclamation crews are present, an
additional 1,000-gallon double walled tank is brought to the site and used to fuel the
respective equipment.
All asphalt cement storage tanks are above-ground. These tanks consist of two
40,000 gallon tanks and three 32,000 gallon tanks. All asphalt cement tanks are
located within a concrete secondary containment area.
All tanks are registered with MPCA’s Storage Tank Program. MPCA Site ID 51999
is for the asphalt plant and MPCA Site ID 55016 is for the sand and gravel operation.
Small amounts of chemicals utilized by the QM Lab are regulated by Washington
County under United States Environmental Protection Agency (EPA) rules. EPA ID
Number MND 981 953 417 has been issued for the site which is classified as a Very
Small Quantity Generator.
14. Contingency Response Plan: The site operates under a SPCC Plan which is available
upon request.
15. Added Provisions: The operator will comply with other reasonable requirements that
the City may find necessary to adopt for the protection of health, safety and welfare
and/or prevention of nuisance.
16. Processing: The site operates permanent processing equipment as defined by
Ordinance No. 103 in accordance with all Federal, State and City air and water
quality and noise standards. Processing equipment is screened from view from other
properties and adjacent roads. Portable crushing equipment is placed on the floor of
the facility and setbacks per Ordinance No. 103 are maintained between the
processing equipment and the property lines.
17. Recycling: Recycling activity at the facility meets all applicable standards contained
in Section 7.1 (1) of Ordinance No, 103.
A Solid Waste Storage Facility license that authorizes the storage of unprocessed
concrete, concrete products and brick and a Recycling Facility license that
authorizes the storage and processing of recycled asphalt products are reissued
annually to Martin Marietta by Washington County. General and Specific Conditions
are established for each license and are reviewed on an annual basis and may
include an annual inspection completed by the County.
Martin Marietta Page 4
2025 Annual Operators Permit Application
January 2025
A copy of the Annual Report to Washington County is available upon request.
18. Trucking Operations: The site has access to County Road 15 (Manning Trail N.),
County Road 91 (Lofton Avenue N.) and 218th Street North. These are hard-surfaced
roads.
19. Asphalt Plants: The site operates a permanent asphalt plant and the plant was in
operation at the time the City adopted its mining ordinance. Therefore, the plant may
expand in the future subject to the setbacks set forth in Section 7.1(1) of Ordinance
No. 103. The plant operates in accordance with all Federal, State, and City air, water,
and noise quality standards.
B. Compliance with Conditions of the CUP
1. Updated Copy of Application Material: A completed bound book that includes all of
the information and plans submitted to the City during the CUP process was
previously submitted and is on file at the City.
2. Watershed District Permit: The Watershed District Permit, P08-003, was revised in
2019 to align the permit with the City’s annual review process and eliminate a 5-
year term on the permit. The revisions to the permit were approved by District
Managers during their February 13, 2019 Regular Meeting.
3. Monitoring Wells: All required monitoring wells have been installed.
4. Groundwater Monitoring Plan: A monitoring plan with protocols is on file with the
City.
5. Excavation Below Water Table: In 2024, excavation into the groundwater table did
not occur. In 2025, excavation into the groundwater table is expected to occur within
the 2025 Potential Mining Area as depicted on Figure 2, Site Plan. Water level data
is collected on an on-going basis and submitted annually to the City (see Table 1).
6. Production Well Records: Records of the production well are kept. They are
summarized on Table 3.
7. Groundwater Analysis: Groundwater samples are collected and analyzed for DRO
in accordance with the groundwater monitoring plan. Table 2 summarizes the
results. DRO was not detected in any of the monitoring wells. There are two sets of
analytical results provided by the operator’s consultant due to the first set of results
dated September 24, 2024 being impacted by laboratory contamination, which did
not provide accurate results. The consultant resampled on December 10, 2024.
Results have been supplied to the City and a copy of the lab reports are included as
Attachment 1. Currently, no gasoline is stored on site. If gasoline is stored on-site in
the future, GRO will be added to the analyte list.
8. MN County Well Index: A figure which illustrates the site and MN County Index wells
is on file at the City.
Martin Marietta Page 5
2025 Annual Operators Permit Application
January 2025
9. Setback from Proposed Lake: The asphalt plant and related structures will be
setback at least 100 feet from the edge of the water body that will be created as part
of mining operations.
10. Lake Depth: The maximum excavation into the water table will be no more than 50
feet. The minimum excavation elevation of 865 feet msl has been established in
previous AOP’s.
11. Truck Hauling Signs: Washington County has posted Lofton and Manning Avenues
per the County’s requirements. Martin Marietta has posted signs on 218th Street per
the City of Scandia requirements.
12. Lofton/Hwy 97 Intersection: Martin Marietta restricts importing add-rock from Lofton
Ave. N. during non-daylight hours as defined in their CUP.
13. 228th Street Sign: Martin Marietta has posted a sign at the Lofton Ave. N. exit that
restricts trucks from using 228th Street.
14. Reclamation and Sequencing Plan: A Reclamation Plan and Phasing Plan is on-file
with the City. Current reclamation progress is indicated on Figure 2, Site Plan,
submitted with this AOP application.
C. Annual Activity
1. Amount of material removed from the site: Approximately 287,700 tons of material was
removed in 2024.
2. Amount of add-rock brought onto the site: Approximately 91,660 tons of Class A, Class
B, Class C and Class D add-rock were imported to the site in 2024.
3. Area reclaimed and type of reclamation: Reclamation activities in 2024 included
placement of overburden material along the mining area north of the Tiller Mine/Dresel
Mine common mining border. The completed and ongoing reclamation areas are
indicated on Figure 2, Site Plan.
Ongoing reclamation activities are anticipated north and south of the Tiller Mine/Dresel
Mine common mining border and primarily along the east half of the mining area,
during 2024. These areas are shown on Figure 2, Site Plan as 2025 Potential
Reclamation Activity. Some of the areas shown as potential reclamation will also see
active mining during 2025. Once mining is complete, reclamation may advance into
these areas during 2025.
4. Average number of trips hauling material to and from the site per day for the season:
The average number of trucks travelling to and from the site per day in 2024 was
approximately 182 trucks per day.
5. On July 19, 2022 the Scandia City Council adopted Resolution No. 2022-27 amending
the Future Land Use Map to remove the Mining Overlay designation from PID
Martin Marietta Page 6
2025 Annual Operators Permit Application
January 2025
17.032.20.21.0005. The approximately 10-acre vacant lot is adjacent to the Dresel
Mine on 218th Street. Since the lot previously shared a common mining and
reclamation border with the Dresel Mine, Martin Marietta reserves the ability to perform
reclamation and future screening berm removal that might be needed to accommodate
future development within the setback area on the Dresel Mine property.
D. Description of operating conditions planned for the coming year:
During the 2025 mining season, the site will continue to operate as it has in the past. The
mining operation includes the removal of overburden, excavation of sand and gravel,
crushing, washing, screening, stockpiling, and recycling of concrete and asphalt products.
Portable crushing, washing, and screening plants are brought to the site periodically and
material is excavated, processed, and stockpiled. Asphalt is produced and sold throughout
the construction season and add rock materials are delivered to the site as needed.
In 2024, improvements were completed to the QM Lab/Scale Office building located on-
site, primarily involving the construction of a new roof for the building. There were no
changes to the footprint or location of the building.
The 2025 production schedule anticipates mining and processing in 2025. The exact area
of excavation will depend on the required gradation of the end products. Mining anticipated
during 2025 will occur within the 2025 Potential Mining Area and some of the Potential
Reclamation Areas as indicated on Figure 2, Site Plan.
Aerial Photo: Figure 1, Aerial Photo, is attached which includes a September 5, 2024 aerial
photo and identifies the mining limit, the Tiller Mine property boundary and the Dresel Mine
property boundary.
Site Plan: Figure 2, Site Plan, is attached which illustrates the 2025 potential active mining
area, reclamation area, stockpile and processing area, reclaimed area and the current
limits of excavation into groundwater.
Reclamation: Ongoing reclamation activities are anticipated north and south of the
Scandia Mine/Dresel Mine common mining border and primarily along the east half of the
mining area during 2025. These areas are shown on Figure 2, Site Plan as 2025 Potential
Reclamation Activity.
Operating Conditions for 2025: The 2025 production schedule anticipates mining and
processing during 2025. Mining will occur within the 2025 Potential Mining Area as
indicated on Figure 2, Site Plan. The exact area of excavation will depend on the required
gradation of the end products.
E. Inspection:
The City conducts an annual inspection of the site. The last inspection occurred on
November 14, 2024.
Martin Marietta Page 7
2025 Annual Operators Permit Application
January 2025
III. CERTIFICATION
I hereby certify that this plan, specification, or report was
prepared by me or under my direct supervision and that I am
a duly Licensed Professional Engineer under the laws of the
state of Minnesota
Kirsten Pauly
Date: January 28, 2025 Reg. No. 21842
Tables
Table 1: Scandia Groundwater Elevation Data
Groundwater elevation levels are recorded in feet above mean sea level
NM=Not Measured (due to obstruction)
MW-2 Taken out of service 6/21/2011
PZ-4 Taken out of service 5/12/2020
914.99 = Apparent incorrect reading at time of field visit
Date
Scandia
Production
Well Scandia PZ-3 Scandia PZ-4 Scandia PZ-5 Scandia PZ-6 Scandia MW-1 Scandia MW-2
Scandia On-
Site Pond
10/16/2024 915.84 915.91 916.83 914.32 918.35 918.21
9/10/2024 916.06 916.13 917.04 914.74 918.59 918.51
8/30/2024 916.16 916.25 917.18 914.91 918.84 918.53
7/25/2024 915.97 916.08 916.75 914.36 918.53 918.23
6/25/2024 915.68 915.78 916.52 914.18 918.38 918.10
5/23/2024 915.33 915.59 916.24 914.01 918.06 917.90
4/22/2024 915.10 915.13 916.28 913.89 917.82 917.47
10/17/2023 916.81 916.66 917.94 915.16 918.83 918.48
9/14/2023 915.97 916.75 918.14 914.78 918.76 918.47
8/23/2023 915.83 916.11 916.82 914.78 918.72 918.42
8/6/2023 915.73 915.83 917.06 914.49 918.54 918.39
6/21/2023 915.93 916.02 916.74 914.62 918.01 918.63
5/5/2023 916.25 916.52 917.83 915.04 916.94 918.69
4/18/2023 916.26 916.31 917.17 914.85 916.98 918.77
4/11/2023 916.15 916.2 917.03 914.75 916.72
10/21/2022 916.45 916.57 917.94 915.16 917.21 919.23
9/14/2022 916.57 916.77 918.27 915.32 917.36
8/23/2022 916.60 916.90 918.49 915.42 918.25 919.41
7/18/2022 916.59 916.82 918.23 915.28 919.72 919.39
6/1/2022 917.11 917.17 918.35 915.81 920.00 919.62
5/13/2022 917.30 917.34 918.30 915.95 921.16 920.12
10/20/2021 917.89 917.95 919.48 916.57 920.81 919.30
9/8/2021 918.16 918.26 919.82 916.85 921.10
8/30/2021 918.27 918.31 919.79 916.93 921.16 920.78
7/27/2021 918.24 918.35 919.94 916.96 921.25 919.68
6/24/2021 NM 919.09 920.29 917.21 921.67 920.30
5/21/2021 NM 918.47 920.27 917.11 921.73 920.38
4/15/2021 918.88 918.95 920.47 917.61 921.86 920.34
10/23/2020 919.41 919.53 921.31 918.12 922.21 921.80
9/17/2020 919.63 919.75 921.58 918.29 922.64 922.12
8/27/2020 919.74 919.80 921.52 918.41 922.64 922.21
7/31/2020 919.26 918.85 920.74 917.91 922.08
6/22/2020 919.29 919.12 920.91 917.75 922.15 921.69
5/22/2020 919.08 919.17 920.02 916.01 921.47
4/23/2020 918.26 918.31 919.85 919.28 916.30 921.35
3/31/2020 918.94 918.97 920.39 920.38 917.64 921.74
10/31/2019 918.41 918.47 919.82 919.94 917.11 921.19
9/9/2019 918.10 918.13 919.75 919.63 916.79 920.99
8/30/2019 917.86 917.89 919.68 919.64 916.55 920.89
7/11/2019 917.73 917.48 919.15 919.20 916.20 920.26
5/10/2019 917.35 917.42 918.95 918.46 916.02 920.33 919.70
4/30/2019 917.23 917.31 919.04 918.4 915.93 922.47
10/24/2018 916.84 916.99 918.57 918.7 916.18 919.88
9/24/2018 917.12 917.17 918.82 918.44 915.83 920.08
8/30/2018 NM 916.95 918.52 918.41 915.62 919.89
7/26/2018 917.06 917.02 918.67 918.44 915.63 920.04
6/6/2018 NM 916.83 918.60 918.36 915.56 919.97 918.11
5/1/2018 917.13 917.2 918.36 918.46 915.88 920.08 918.23
4/25/2018 917.12 917.16 918.7 918.52 915.88 920.13
11/30/2017 917.53 917.61 919.06 919.12 916.29 921.44 919.17
10/31/2017 NM 917.52 919.26 919.21 916.20 920.57 918.91
9/28/2017 917.63 917.71 NM 919.23 916.44 920.53
8/24/2017 917.69 917.75 919.18 NM 916.41 920.53
7/20/2017 917.35 917.48 919.06 919.04 916.32 920.4
6/15/2017 917.35 917.48 918.76 918.67 916.11 920.2
5/16/2017 917.00 917.05 918.5 918.31 915.73 919.83
4/27/2017 916.89 916.95 918.34 NM 915.67 919.71
Page 1 of 3
Date
Scandia
Production
Well Scandia PZ-3 Scandia PZ-4 Scandia PZ-5 Scandia PZ-6 Scandia MW-1 Scandia MW-2
Scandia On-
Site Pond
10/3/2016 916.35 916.39 917.86 917.56 915.13 919.17 917.24
9/27/2016 916.33 916.30 917.86 917.40 914.94 919.18
8/16/2016 915.97 916.00 917.50 917.28 914.75 918.79
7/6/2016 915.68 915.71 917.12 916.57 914.44 917.35
5/20/2016 914.40 914.09 915.63 915.17 913.00 916.66
10/5/2015 914.35 914.38 915.90 915.51 913.15 917.19 915.43
9/29/2015 914.34 914.33 915.88 915.38 913.05 917.18
8/11/2015 914.05 914.08 915.60 915.14 912.80 916.88
7/16/2015 913.77 913.80 915.38 914.90 912.57 916.69
6/18/2015 913.52 913.52 915.00 914.74 912.31 916.36
5/18/2015 913.37 913.40 914.87 914.63 912.16 916.18
4/17/2015 913.39 913.42 914.88 914.75 912.23 916.23
10/9/2014 913.83 913.96 915.44 915.17 912.71 916.77 914.7
9/17/2014 914.00 914.06 915.49 915.12 912.81 916.79
8/19/2014 913.85 913.91 915.36 914.96 912.64 916.66
7/9/2014 913.64 913.69 915.18 914.58 912.41 916.48
6/18/2014 913.41 914.99 914.92 915.72 913.68 916.20
5/12/2014 913.03 913.08 914.56 913.93 912.84 915.85
4/22/2014 912.58 912.60 914.07 913.74 911.38 915.43
11/20/2013 912.88 912.89 914.35 914.20 911.70 915.74
10/25/2013 912.98 913.03 914.50 914.30 911.80 915.83 913.91
9/26/2013 913.00 913.05 914.52 914.29 911.81 915.88
8/27/2013 913.17 913.23 914.66 914.43 911.98 916.03
7/25/2013 913.19 913.29 914.75 914.41 912.06 916.09
6/25/2013 913.17 913.17 914.66 914.18 911.95 915.98
5/23/2013 912.92 912.94 914.45 913.92 911.62 915.79 913.99
4/25/2013 912.90 912.90 914.43 913.88 911.60 915.78
12/5/2012 912.93 912.99 914.45 914.28 911.70 915.83
10/25/2012 913.14 913.19 914.64 914.50 911.98 916.01 914.17
9/26/2012 913.25 913.29 914.78 914.57 912.03 916.16
9/5/2012 913.44 913.48 914.94 914.83 912.28 916.31
7/26/2012 913.71 913.74 915.22 914.89 912.50 916.52
6/26/2012 913.67 913.67 915.12 914.89 912.50 916.46
5/22/2012 913.37 913.38 914.92 914.61 912.22 916.25
4/23/2012 913.22 913.22 914.69 914.50 912.07 916.07 914.13
3/29/2012 913.26 913.27 914.78 914.53 912.09 916.14
11/10/2011 913.74 913.78 915.19 914.99 912.55 916.55
10/3/2011 913.78 913.83 915.27 915.00 912.60 916.62 914.74
9/8/2011 913.78 913.81 915.29 914.90 912.59 916.61
8/5/2011 913.71 913.72 915.24 914.56 912.44 916.55
7/13/2011 913.30 913.36 914.83 914.34 912.07 916.17
6/21/2011 913.13 913.19 914.65 914.14 911.97 915.99 916.13
6/6/2011 913.06 913.10 914.52 913.97 911.89 915.88 916.02 914.18
5/6/2011 912.70 912.74 914.16 913.69 911.53 915.53 915.68
4/7/2011 912.46 912.48 913.97 913.49 911.22 915.35 915.50
11/23/2010 912.29 912.32 913.84 913.47 911.02 915.18 915.32
10/19/2010 912.46 912.45 913.98 913.62 911.24 915.34 915.46
9/14/2010 912.37 912.38 913.91 913.55 911.11 915.23 915.36
8/9/2010 912.37 912.38 913.92 913.56 911.12 915.22 915.35
7/6/2010 912.47 912.46 NM 913.57 911.19 915.28 915.40
6/7/2010 912.39 912.41 913.94 913.65 911.17 915.30 915.43
4/27/2010 912.51 912.53 914.03 913.77 911.28 915.42 915.54
11/5/2009 913.14 913.15 914.70 914.37 911.89 916.07 916.14
10/21/2009 913.17 913.17 914.72 914.50 911.93 916.08 916.17 914.30
9/10/2009 913.28 913.30 914.85 914.55 912.04 916.22 916.31
8/6/2009 913.28 913.39 914.88 914.70 912.15 916.27 916.35
6/11/2009 913.55 913.58 915.08 914.83 912.36 916.49 916.60
5/18/2009 913.67 913.70 915.19 914.94 912.51 916.61 916.69
4/6/2009 913.79 913.81 915.35 915.04 912.60 916.78 916.86
10/30/2008 914.35 914.37 915.87 915.60 913.13 917.31 917.37
9/16/2008 914.51 914.57 916.06 915.81 913.28 917.48 917.54
8/7/2008 914.60 914.65 916.20 915.80 917.60 917.65
7/9/2008 914.54 914.58 916.13 915.68 917.55 917.61
6/9/2008 914.44 914.50 915.99 915.53 917.44 917.51
5/14/2008 914.29 914.34 915.38 917.29 917.37
5/6/2008 914.26 914.31
Page 2 of 3
Date
Scandia
Production
Well Scandia PZ-3 Scandia PZ-4 Scandia PZ-5 Scandia PZ-6 Scandia MW-1 Scandia MW-2
Scandia On-
Site Pond
3/28/2008 914.07 914.11
2/22/2008 914.16 914.18
1/9/2008 914.30 NM
12/12/2007 914.48 NM
11/8/2007 914.70 914.74
10/11/2007 914.64 914.68
9/11/2007 914.60 914.64
7/19/2007 914.77 914.82
6/13/2007 914.85 914.91
5/2/2007 915.06 915.11
9/6/2006 915.87 915.90
Page 3 of 3
Table 2 Water Quality Results
Potable Well:
Date Diesel Range Organics mg/L Total Suspended Solids mg/L Nitrogen, Ammonia mg/L Phosphorous mg/L
12/10/2024 ND
9/24/2024 -
9/6/2023 ND
9/14/2022 ND
9/8/2021 ND
9/17/2020 ND
9/9/2019 ND
9/26/2018 ND
9/28/2017 ND
9/27/2016 ND
9/29/2015 ND
9/25/2014 ND
9/26/2013 ND
9/26/2012 ND
9/29/2011 ND
9/14/2010 ND
10/21/2009 ND ND 0.051 ND
Production Well:
Date Diesel Range Organics mg/L Total Suspended Solids mg/L Nitrogen, Ammonia mg/L Phosphorous mg/L
12/10/2024 ND
9/24/2024 -
9/6/2023 ND
9/14/2022 ND
9/8/2021 ND
9/17/2020 ND
9/9/2019 ND
9/26/2018 ND
9/28/2017 ND
9/27/2016 ND
9/29/2015 ND
9/25/2014 ND
Page 1 of 4
9/26/2013 ND
9/26/2012 ND
9/29/2011 ND
9/14/2010 ND
10/21/2009 ND ND 0.053 ND
PZ-3:
Date Diesel Range Organics mg/L Total Suspended Solids mg/L Nitrogen, Ammonia mg/L Phosphorous mg/L
12/10/2024 ND
9/24/2024 -
9/6/2023 ND
9/14/2022 ND
9/8/2021 ND
9/17/2020 ND
9/9/2019 ND
9/26/2018 ND
9/28/2017 ND
9/27/2016 ND
9/29/2015 ND
9/25/2014 ND
9/26/2013 ND
9/26/2012 ND
9/29/2011 ND
9/14/2010 ND
10/21/2009 ND ND 0.18 0.65
PZ-4: Taken out of service May 12, 2020
Date Diesel Range Organics mg/L Total Suspended Solids mg/L Nitrogen, Ammonia mg/L Phosphorous mg/L
9/9/2019 ND ND ND ND
9/26/2018 ND ND ND ND
10/20/2017 ND ND ND ND
9/27/2016 ND ND ND 0.074
9/29/2015 ND 16.0 ND 0.052
9/25/2014 ND 23.0 0.092 0.081
9/26/2013 ND 46.4 0.13 0.11
Page 2 of 4
9/26/2012 ND 942 0.14 0.39
9/29/2011 ND 65.3 0.041 0.094
9/14/2010 ND 161 0.15 0.15
10/21/2009 ND 102 0.048 ND
PZ-6
Date Diesel Range Organics mg/L Total Suspended Solids mg/L Nitrogen, Ammonia mg/L Phosphorous mg/L
12/10/2024 ND
9/24/2024 -ND ND 0.11
9/6/2023 ND 15.1 ND 0.14
9/14/2022 ND 124 ND 0.10
9/8/2021 ND ND ND ND
9/17/2020 ND ND ND ND
9/9/2019 ND ND ND 0.10
9/26/2018 ND ND ND 0.18
9/28/2017 ND ND ND 0.072
9/27/2016 ND 134 ND 0.20
9/29/2015 ND ND ND 0.061
9/25/2014 ND ND 0.058 0.084
9/26/2013 ND ND 0.079 0.071
9/26/2012 ND ND 0.077 ND
9/29/2011 ND ND 0.071 ND
9/14/2010 ND 11.7 0.098 0.084
10/21/2009 ND 11.3 0.1 ND
Pond
Date Diesel Range Organics mg/L Total Suspended Solids mg/L Nitrogen, Ammonia mg/L Phosphorous mg/L
12/10/2024 N/A**
9/24/2024 -3.2 ND ND
9/6/2023 ND ND ND ND
9/14/2022 ND ND ND ND
9/8/2021 ND ND ND ND
9/17/2020 ND ND ND ND
9/9/2019 ND ND ND ND
9/26/2018 ND ND ND ND
Page 3 of 4
9/28/2017 ND ND ND ND
9/27/2016 ND 11.0 ND 0.061
9/29/2015 ND ND ND 0.96
9/25/2014 ND ND 0.096 ND
9/26/2013 ND ND 0.089 ND
9/26/2012 ND ND 0.078 ND
9/29/2011 ND ND 0.069 ND
11/5/2010 ND NA NA NA
9/14/2010 .11*ND 0.057 ND
10/21/2009 ND ND ND ND
*Upon Detection of Diesel Range Organics (DRO) above the reporting limit of 0.10 mg/l,
the sample was further analysed for the presence of Polycyclic Aromatic Hydrocarbons (PAHs)
which were not detected. As additional follow up, the pond was resampled for DRO in
November, 2010 at the request of the City.
Although not required, initial baseline data were obtained for all wells and results reported herein.
Background data has been collected voluntarily for PZ-5, MW-1 and MW-2 in the past and is available upon request.
** Not accessible due to ice conditions.
Page 4 of 4
Table 3 Production Well Records
Scandia Mine
Pumping Records: 2024
Production Well
Month Amount Pumped (Gal)
January 0
February 0
March 0
April 11,000
May 61,717
June 33,032
July 185,941
August 68,253
September 6,927,038
October 5,669,237
November 3,910,017
December 9
16,866,244 Total Pumped in 2024:
Water Appropriation Permit authorizes withdrawal of up to
30 million gallons per year.
Figures
TILLER
MINE
MINING
LIMITS
MINING
LIMITS
MINING
LIMITS
DRESEL
MINE
COMMON
MINING
BORDER
Engineering, PLLC.
Sunde
Figure 1
Aerial Photo
Annual Operators Permit
Aerial image collected via UAV on September 5, 2024 over active
portions of Mine and Bing WMS Aerial Photo over remaining areas.
10
0
'
50
'
PEMBg
PEMB
PEMB
PEMB
PEMC
PSS1B
PEMB
PUBG
PEMB
PEMC
PEMB
PEMB
PEMB
PSS1B
PEMC
PEMCx
PEMB
PEMC
PEMC
PUBG
PUBG
PFO1C
PEMC
PSS1/3B
PEM/SS1B
PEMC
PEMA
PEMC
PEMC
PEMC
PEMB
PEMB
SS1
PSS1B
PEMC
PEMC
PSS1B
PEMC
PEMC
PUBG
218TH ST. N.
PSSIB
PEMF
PEMC
PEMC
STOCKPILE AND
PROCESSING
AREA
(Future Mining)
RECLAIMED
AREA
RECLAIMED
AREA
RECLAIMED
AREA
MINING
LIMITS
SCREENING BERM
LOCKING
GATE
MINING
LIMITS
MINING
LIMITS
RECLAIMED
AREA
HAUL RD. TO
LOFTON AVE.
DRESEL MINE
TILLER MINE
2025 POTENTIAL
MINING AREA
2025 POTENTIAL
MINING AREA
HAUL
ROAD
LOCKING
GATE
LOCKING
GATE
S
C
R
E
E
N
I
N
G
B
E
R
M
Maintain 50'
Wetland Setback
2025 POTENTIAL
RECLAMATION
AREA
Maintain 50'
Wetland Setback
CURRENT LIMITS
OF EXCAVATION
INTO
GROUNDWATER
2025 POTENTIAL RECLAMATION AREA -
INCLUDES RECLAMATION OF A PORTION
OF THE GROUNDWATER POND
STAFF GAUGE
INSTALLED AT
NORTH END OF
GROUNDWATER
POND
COMMON MINING BORDER
MW-1
PZ-5
PZ-6
PZ-3
PRODUCTION
WELL
SCALE HOUSE
WELL
RECLAIMED
AREA
SHEET NO:
DATE:
DRAWN BY:
CHECKED BY:
SCALE:
APPROVED BY:
PROJECT NO.:
REG. NO.:DATE:
I HEREBY CERTIFY THAT THIS PLAN,
SPECIFICATION, OR REPORT WAS PREPARED
BY ME OR UNDER MY DIRECT SUPERVISION
AND THAT I AM A DULY LICENSED
PROFESSIONAL ENGINEER UNDER THE LAWS
OF THE STATE OF MINNESOTA.
DESCRIPTION:
INFORMATION:
REVISIONDATE
Engineering, PLLC.
CONSULTING CIVIL ENGINEERS
10830 NESBITT AVENUE SOUTH
BLOOMINGTON, MINNESOTA 55437
(952) 881-3344 TELEPHONE
(952) 881-1913 FAX
www.sundecivil.com
Sunde
Kirsten Pauly
93-253
KP
Graphic
12/17/2024
KP
1 of 1
Figure 2
2184212/17/2024
SITE PLAN
TILLER
CORPORATION
SCANDIA,
MINNESOTA
ANNUAL
OPERATORS PERMIT
NOTES:
1.TOPOGRAPHY WITHIN MINE LIMITS FROM 09/05/2024 UMV FLIGHT.
REMAINING TOPOGRAPHIC INFORMATION FROM 2011 LiDAR
ELEVATION, TWIN CITIES METRO REGION, MINNESOTA
2.SETBACKS. THE FOLLOWING MINING SETBACKS WILL BE MAINTAINED:
·50' FROM PROPERTY LINE
·200' FROM OCCUPIED STRUCTURES
·100' FROM ANY CONTIGUOUS PROPERTY SUBDIVIDED
INTO RESIDENTIAL LOTS OF FIVE (5) ACRES OR LESS
(NOT APPLICABLE)
·100' FROM ROAD R-O-W
PROCESSING AREA SHOWN REFLECTS CURRENT
CONDITION. PROCESSING AREAS WILL CHANGE
WITH THE PROGRESSION OF MINING. MULTIPLE
PROCESSING OPERATIONS MAY BE LOCATED
THROUGHOUT THE PROCESSING AREA OR
AREAS. CERTAIN PROCESSING OPERATIONS
REQUIRE EQUIPMENT TO BE PLACED NEAR THE
VARIOUS MATERIALS NEEDED TO MAKE SPECIFIC
PRODUCTS AND OTHER PROCESSING
OPERATIONS NEED TO BE PLACED IN A MANNER
THAT AVOIDS CONFLICTS WITH THE ACTUAL
MINING.
ADDITIONAL MINING MAY BE REQUIRED IN POTENTIAL
RECLAMATION AREAS.
Mining Limit
950
980
970
940
950 960 970 980
990
930
950960970
970
980
9
9
0
980
990
10
0
0
1010
930
940
960
980
1000
95
09609
7
0
980
9
4
0
9
5
0
96
0
9
3
0
940
950
9
6
0
970
9
8
0
950
9
5
0
960
96
0
940
9
5
0
960
950
9
5
0
960
960
95
0
96
0
97
0
950
960
960
960
97
0
970
980
9
9
0
94
0
95
0
96
0
97
0
930
940
950
96
0
930
940
9
5
0
960
9
6
0
960
9
5
0
950
9
6
0
9
6
0
960
9
6
0
960
9
6
0
9
7
0
9
7
0
97
0
98
0
9
8
0
960
97
0
9
3
0
9
5
0
990
9
4
0
970
980
9
8
0
9
9
0
9
9
0
990
1000
1
0
0
0
10
0
0
1010
1010
94
0
95
0
96
0
97
0
98
0
99
0
930
9
4
0
960
9
4
0
950
93
0
9
4
0
9
5
0
9
6
0
9
7
0
9
8
0
9
9
0
10
0
0
1
0
1
0
9
5
0
9
6
0
9
7
0
9
8
0
980
980
9
8
0
98
0
9
9
0
99
0
99
0
9
9
0
1
0
0
0
1
0
0
0
1000
10
0
0
1010
10
1
0
1
0
1
0
950
960
960
960970
9
7
0
980
980
9
7
0
9
7
0
970
9
8
0
980
980
98
0
970
9
8
0
96
0
960
9
7
0
9
8
0
9
9
0
9
4
0
95
0
960
9
6
0
97
0
9
7
0
92
0
9
3
0
9
4
0
9
5
0
9
6
0
97
0
9
7
0
9
7
0
9
8
0
980
980
9
8
0
980
98
0
9
8
0
990
99
0
9
9
0 990
990
99
0
990 9
9
0
99
0
10
0
0
1000
1
0
0
0
96
0
97
0
9
8
0
98
0
990
99
0
9
9
0
99
0
9
9
0
1
0
0
0
100
0
96096
0
9
7
0
97
0
9
8
0
9
9
0
1
0
0
0
1
0
1
0
9
6
0
96
0
97
0
980
9
7
0
10
0
0
95
0
970
94095
0
960
93
0
980
990
97
0
9
5
0
95
0
96
0
960
9
4
0
9
5
0
960
930
W.E.
933.3
22044
Z 995.730
22045Z 989.820
11043E 692146.185N 120313.240
22046Z 950.800
MA
N
N
I
N
G
AV
E
N
U
E
EAST 1223.25
S 89°22'12" W 1422.96
S 89°41'05" W 1287.61
S 89°19'52" W 1277.99
N 89°57'12" E 2649.44 S 89°44'30" E 693.00
N 89°52'27" E 983.08
N
5
°
4
2
'
4
3
"
E
6
2
3
.
5
1
N 89°37'35" E
631.03
R
=
2
2
9
1
.
8
2
=
0
°
2
6
'
0
5
"
L
=
1
7
.
3
9
R
=
1
9
0
9
.
8
6
=
9
°
5
7
'
3
2
"
L
=
3
3
1
.
9
6
N
1
2
°
2
3
'
4
6
"
E
9
0
6
.
9
4
N
1
°
2
5
'
5
6
"
E
1
4
2
0
.
4
6
N
0
°
3
5
'
3
1
"
W
1
3
1
7
.
7
6
S
1
°
0
1
'
2
0
"
E
1
3
2
5
.
7
9
S 41
°
5
3
'
2
2
"
W
363
.
7
0
S
1
7
°
4
4
'
2
2
"
W
42
8
.
1
6
L = 331.96
= 9°57'32"
R = 1909.86
L = 331.96
= 9°57'32"
R = 1909.86
L = 331.96
= 9°57'32"
R = 1909.86
24
9
.
3
4
S
0
°
0
1
'
4
5
"
W
6
5
9
.
6
2
S
0
°
3
3
'
4
3
"
E
1
3
1
9
.
6
0
19
7
8
.
5
7
50' SETBACK
4:1 SLOPES
S 89°31'35"W
65.46
NSP CO. EASEMENT
R
=
1
9
8
0
.
9
7
=
2
0
°
2
9
'
5
4
"
L
=
6
7
4
.
3
8
963.2
955.5
958.5
956.9
964.4
962.4969.7962.4
958.2
962.9
961.3
97
0
9
5
0
9
7
0
960
9
4
0
972.8
960.2
973.8 968.9 966.3 959.2 951.3 945.2
942.6
945.6
962.4
945.2
940.8
940.2
944.2
950.7
954.4
957.6
958.3
957.6
953.7
948.8
962.3
956.1
961.9
972.7
994.9
969.4
969.6
965.5981.3
974.5
930.4
939.9
956.8968.6
974.4
959.0
928.2
958.2
962.9
986.7
50' SETBACK
GATE
L
O
F
T
O
N
R
O
A
D
970
980
960
950
940
920
930
950
960
99
0
98
0
97
0
96
0
95
0
94
0
93
0
92
0
94
0
93
0
92
0
95
0
96
0
97
0
98
0
99
0
960
9
6
0
950
92
0
940
9
3
0
916±
100 FEET
VARIES
MINIMUM TOPSOIL AND
SEEDED TO ESTABLISH
NATIVE VEGETATION
6:1 SLOPE FOR A
HORIZONTAL
DISTANCE OF 100'
SLOPE VARIES
- 4:1 MAX.
1 4
6:1 SLOPE
6
1
VARIES
SLOPE VARIES
- 3:1 MAX.
1 3
TYPICAL SECTION
EDGE OF WATER BODY
DEPTH
VARIES
218TH ST. N.
LO
F
T
O
N
A
V
E
.
N
.
1000
10
0
0
990
980
970
9
7
0
9
8
0
9
9
0
970
980
960
950
940
920
930
950
960
99
0
98
0
97
0
96
0
95
0
94
0
93
0
92
0
94
0
93
0
92
0
95
0
96
0
97
0
98
0
99
0
960
9
6
0
950
92
0
940
9
3
0
1000
930
940 950 960 970 980 990
1000
932
934
936 938
922
924
926
928
9
3
0
94
0
950
96
0
PROPOSED FUTURE LAKE CONFIGURATION
WATER ELEVATION AT 916+/-
BOTTTOM OF LAKE AT 870-890
4.I
SHEET NO:
DATE:
DRAWN BY:
CHECKED BY:
SCALE:
APPROVED BY:
PROJECT NO.:
REG. NO.:DATE:
I HEREBY CERTIFY THAT THIS PLAN,
SPECIFICATION, OR REPORT WAS PREPARED
BY ME OR UNDER MY DIRECT SUPERVISION
AND THAT I AM A DULY LICENSED
PROFESSIONAL ENGINEER UNDER THE LAWS
OF THE STATE OF MINNESOTA.
DESCRIPTION:
INFORMATION:
REVISIONDATE
T. , R. , S. #DRAWING: \\kirstenspc\DWGS\a-Tiller - All\Tiller Scandia\Annual Operators Permit\AOP 2025\Figure 3 - 2025 AOP Mining and Reclamation Plan.dwg LAYOUT: C3 11x17
Engineering, PLLC.
CONSULTING CIVIL ENGINEERS
10830 NESBITT AVENUE SOUTH
BLOOMINGTON, MINNESOTA 55437
(952) 881-3344 TELEPHONE
(952) 881-1913 FAX
www.sundecivil.com
Sunde
KIRSTEN PAULY
93-253
KP
Graphic
12/17/2024
1 of 7
Figure 3
2184212/17/2024
GL7,8 2032 93-253
MINING AND
RECLAMATION
PLAN
600300300
TILLER
CORPORATION
SCANDIA,
MINNESOTA
ANNUAL
OPERATORS PERMIT
Martin Marietta Page 8
2025 Annual Operators Permit Application
January 2025
Attachment 1
2024 Lab Reports
pacelabs.com 1700 Elm Street SE, Minneapolis, MN 55414
October 18, 2024
Mr. Paul Schultz
Barton Sand and Gravel
P.O. Box 1480
Maple Grove, MN 55311-6480
RE: Pace Field Project No. 24-08573 Lab ID: 10709087
Client Project ID: Barton Sand & Gravel – Annual Scandia Pit 741
Dear Mr. Shultz,
Enclosed are the analytical results for our recent monitoring event at Barton Sand & Gravel
Scandia Pit 741, Pace® Field P/N: 24-08573 and Pace® Lab P/N: 10709087. The enclosed
materials relate to the Annual 2024 monitoring event for the sampling of two monitoring wells (PZ-
3 and PZ-6), a pond, production well, and potable well monitoring points conducted on
September 24, 2024
Please note that the WIDRO detections in the samples were also present in the lab Method
Blank. We received the following additional information from the laboratory regarding the
evaluation of this data “The lab department supervisor overlayed the sample chromatograms with
the method blank and found similar patterns to the contaminated method blank that could be
causing the detections in the samples submitted for these projects.” We believe this further
demonstrates that the detections in your samples are a result of contamination introduced by the
laboratory system.
Results reported herein conform to the applicable TNI/NELAC Standards and the laboratory's
Quality Manual, where applicable, unless otherwise noted in the body of the report.
If you have any questions concerning this report, please feel free to contact me.
Sincerely,
Riley Jacobson
Field Scientist I
612-280-5475
State of Minnesota Laboratory No. 027-053-137
CC: Ms. Christina Morrison
#=CL#
October 07, 2024
LIMS USE: FR - RILEY JACOBSON
LIMS OBJECT ID: 10709087
10709087
Project:
Pace Project No.:
RE:
Riley Jacobson
Pace Analytical Services - Field Services
1700 Elm Street SE
Minneapolis, MN 55414
24-08573 Pit741 Scandia 2024
Dear Riley Jacobson:
Enclosed are the analytical results for sample(s) received by the laboratory on September 24, 2024. The results relate only
to the samples included in this report. Results reported herein conform to the applicable TNI/NELAC Standards and the
laboratory's Quality Manual, where applicable, unless otherwise noted in the body of the report.
The test results provided in this final report were generated by each of the following laboratories within the Pace Network:
• Pace Analytical Services - Minneapolis
If you have any questions concerning this report, please feel free to contact me.
Sincerely,
Annika Asp
annika.asp@pacelabs.com
Project Manager
(612)607-1700
Enclosures
cc:Brad Jacobson, Pace Analytical Services - Field Services
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 1 of 15
#=CP#
CERTIFICATIONS
Pace Project No.:
Project:
10709087
24-08573 Pit741 Scandia 2024
Pace Analytical Services, LLC - Minneapolis MN
1700 Elm Street SE, Minneapolis, MN 55414
Alabama Certification #: 40770
Alaska Contaminated Sites Certification #: 17-009
Alaska DW Certification #: MN00064
Arizona Certification #: AZ0014
Arkansas DW Certification #: MN00064
Arkansas WW Certification #: 88-0680
California Certification #: 2929
Colorado Certification #: MN00064
Connecticut Certification #: PH-0256
DoD Certification via A2LA #: 2926.01
EPA Region 8 Tribal Water Systems+Wyoming DW
Certification #: via MN 027-053-137
Florida Certification #: E87605
Georgia Certification #: 959
GMP+ Certification #: GMP050884
Hawaii Certification #: MN00064
Idaho Certification #: MN00064
Illinois Certification #: 200011
Indiana Certification #: C-MN-01
Iowa Certification #: 368
ISO/IEC 17025 Certification via A2LA #: 2926.01
Kansas Certification #: E-10167
Kentucky DW Certification #: 90062
Kentucky WW Certification #: 90062
Louisiana DEQ Certification #: AI-03086
Louisiana DW Certification #: MN00064
Maine Certification #: MN00064
Maryland Certification #: 322
Michigan Certification #: 9909
Minnesota Certification #: 027-053-137
Minnesota Dept of Ag Approval: via MN 027-053-137
Minnesota Petrofund Registration #: 1240
Mississippi Certification #: MN00064
Missouri Certification #: 10100
Montana Certification #: CERT0092
Nebraska Certification #: NE-OS-18-06
Nevada Certification #: MN00064
New Hampshire Certification #: 2081
New Jersey Certification #: MN002
New York Certification #: 11647
North Carolina DW Certification #: 27700
North Carolina WW Certification #: 530
North Dakota Certification (A2LA) #: R-036
North Dakota Certification (MN) #: R-036
Ohio DW Certification #: 41244
Ohio VAP Certification (1700) #: CL101
Oklahoma Certification #: 9507
Oregon Primary Certification #: MN300001
Oregon Secondary Certification #: MN200001
Pennsylvania Certification #: 68-00563
Puerto Rico Certification #: MN00064
South Carolina Certification #:74003001
Tennessee Certification #: TN02818
Texas Certification #: T104704192
Utah Certification #: MN00064
Vermont Certification #: VT-027053137
Virginia Certification #: 460163
Washington Certification #: C486
West Virginia DEP Certification #: 382
West Virginia DW Certification #: 9952 C
Wisconsin Certification #: 999407970
Wyoming UST Certification via A2LA #: 2926.01
USDA Permit #: P330-19-00208
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 2 of 15
#=SS#
SAMPLE SUMMARY
Pace Project No.:
Project:
10709087
24-08573 Pit741 Scandia 2024
Lab ID Sample ID Matrix Date Collected Date Received
10709087001 Potable Well Water 09/24/24 12:05 09/24/24 15:00
10709087002 Production Well Water 09/24/24 11:45 09/24/24 15:00
10709087003 Pond Water 09/24/24 11:25 09/24/24 15:00
10709087004 PZ-3 Water 09/24/24 09:40 09/24/24 15:00
10709087005 PZ-6 Water 09/24/24 08:50 09/24/24 15:00
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 3 of 15
#=SA#
SAMPLE ANALYTE COUNT
Pace Project No.:
Project:
10709087
24-08573 Pit741 Scandia 2024
Lab ID Sample ID Method
Analytes
ReportedAnalysts
10709087001 Potable Well WI MOD DRO 2TT2
10709087002 Production Well WI MOD DRO 2TT2
10709087003 Pond WI MOD DRO 2TT2
SM 2540D 1JKH
EPA 350.1 1JFP
SM 4500-P F 1EPT
10709087004 PZ-3 WI MOD DRO 2TT2
10709087005 PZ-6 WI MOD DRO 2TT2
SM 2540D 1JKH
EPA 350.1 1JFP
SM 4500-P F 1EPT
PASI-M = Pace Analytical Services - Minneapolis
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 4 of 15
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
10709087
24-08573 Pit741 Scandia 2024
Sample:Potable Well Lab ID:10709087001 Collected:09/24/24 12:05 Received:09/24/24 15:00 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit
Analytical Method: WI MOD DRO Preparation Method: WI MOD DRO
Pace Analytical Services - Minneapolis
WIDRO RV GCS
WDRO C10-C28 0.12 mg/L 09/27/24 16:26 B,P209/26/24 17:030.091 1
Surrogates
n-Triacontane (S)95 %.09/27/24 16:2609/26/24 17:031
Sample:Production Well Lab ID:10709087002 Collected:09/24/24 11:45 Received:09/24/24 15:00 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit
Analytical Method: WI MOD DRO Preparation Method: WI MOD DRO
Pace Analytical Services - Minneapolis
WIDRO RV GCS
WDRO C10-C28 0.15 mg/L 09/27/24 16:33 B,P209/26/24 17:030.10 1
Surrogates
n-Triacontane (S)93 %.09/27/24 16:3309/26/24 17:031
Sample:Pond Lab ID:10709087003 Collected:09/24/24 11:25 Received:09/24/24 15:00 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit
Analytical Method: WI MOD DRO Preparation Method: WI MOD DRO
Pace Analytical Services - Minneapolis
WIDRO RV GCS
WDRO C10-C28 0.14 mg/L 09/27/24 16:41 B,P209/26/24 17:030.10 1
Surrogates
n-Triacontane (S)94 %.09/27/24 16:4109/26/24 17:031
Analytical Method: SM 2540D
Pace Analytical Services - Minneapolis
2540D Total Suspended Solids
Total Suspended Solids 3.2 mg/L 09/30/24 18:042.5 1
Analytical Method: EPA 350.1
Pace Analytical Services - Minneapolis
350.1 Ammonia
Nitrogen, Ammonia ND mg/L 09/29/24 11:26 7664-41-70.10 1
Analytical Method: SM 4500-P F Preparation Method: SM 4500-P B
Pace Analytical Services - Minneapolis
SM4500P-F, Total Phosphorus
Phosphorus ND mg/L 10/02/24 13:41 7723-14-010/01/24 12:400.10 1
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 10/07/2024 03:21 PM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 5 of 15
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
10709087
24-08573 Pit741 Scandia 2024
Sample:PZ-3 Lab ID:10709087004 Collected:09/24/24 09:40 Received:09/24/24 15:00 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit
Analytical Method: WI MOD DRO Preparation Method: WI MOD DRO
Pace Analytical Services - Minneapolis
WIDRO RV GCS
WDRO C10-C28 0.10 mg/L 09/27/24 16:49 B,P209/26/24 17:030.095 1
Surrogates
n-Triacontane (S)93 %.09/27/24 16:4909/26/24 17:031
Sample:PZ-6 Lab ID:10709087005 Collected:09/24/24 08:50 Received:09/24/24 15:00 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit
Analytical Method: WI MOD DRO Preparation Method: WI MOD DRO
Pace Analytical Services - Minneapolis
WIDRO RV GCS
WDRO C10-C28 0.13 mg/L 09/27/24 16:57 B,P209/26/24 17:030.091 1
Surrogates
n-Triacontane (S)107 %.09/27/24 16:5709/26/24 17:031
Analytical Method: SM 2540D
Pace Analytical Services - Minneapolis
2540D Total Suspended Solids
Total Suspended Solids ND mg/L 09/30/24 18:042.5 1
Analytical Method: EPA 350.1
Pace Analytical Services - Minneapolis
350.1 Ammonia
Nitrogen, Ammonia ND mg/L 09/29/24 11:27 7664-41-70.10 1
Analytical Method: SM 4500-P F Preparation Method: SM 4500-P B
Pace Analytical Services - Minneapolis
SM4500P-F, Total Phosphorus
Phosphorus 0.11 mg/L 10/02/24 13:42 7723-14-010/01/24 12:400.10 1
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 10/07/2024 03:21 PM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 6 of 15
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
10709087
24-08573 Pit741 Scandia 2024
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
QC Batch:
QC Batch Method:
Analysis Method:
Analysis Description:
970495
WI MOD DRO
WI MOD DRO
WIDRO Reduced Volume GCS
Laboratory:Pace Analytical Services - Minneapolis
Associated Lab Samples:10709087001, 10709087002, 10709087003, 10709087004, 10709087005
Parameter Units
Blank
Result
Reporting
Limit Qualifiers
METHOD BLANK:5071585
Associated Lab Samples:10709087001, 10709087002, 10709087003, 10709087004, 10709087005
Matrix:Water
Analyzed
WDRO C10-C28 mg/L 0.12 0.10 09/27/24 15:55
n-Triacontane (S)%.95 09/27/24 15:55
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
5071586LABORATORY CONTROL SAMPLE & LCSD:
LCSSpike LCSD
% Rec RPD
Max
RPD
LCSD
Result
5071587
WDRO C10-C28 mg/L 2.02 99 75-115841.7 16 20
n-Triacontane (S)%.90 76
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 10/07/2024 03:21 PM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 7 of 15
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
10709087
24-08573 Pit741 Scandia 2024
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
QC Batch:
QC Batch Method:
Analysis Method:
Analysis Description:
970864
SM 2540D
SM 2540D
2540D Total Suspended Solids
Laboratory:Pace Analytical Services - Minneapolis
Associated Lab Samples:10709087003, 10709087005
Parameter Units
Blank
Result
Reporting
Limit Qualifiers
METHOD BLANK:5073835
Associated Lab Samples:10709087003, 10709087005
Matrix:Water
Analyzed
Total Suspended Solids mg/L ND 2.5 09/30/24 18:03
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
5073836LABORATORY CONTROL SAMPLE:
LCSSpike
Total Suspended Solids mg/L 107100 107 80-120
Parameter Units
Dup
Result
Max
RPD QualifiersRPDResult
10709578001
5073837SAMPLE DUPLICATE:
Total Suspended Solids mg/L ND 10ND
Parameter Units
Dup
Result
Max
RPD QualifiersRPDResult
10709578002
5073838SAMPLE DUPLICATE:
Total Suspended Solids mg/L 1J 10ND
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 10/07/2024 03:21 PM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 8 of 15
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
10709087
24-08573 Pit741 Scandia 2024
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
QC Batch:
QC Batch Method:
Analysis Method:
Analysis Description:
970791
EPA 350.1
EPA 350.1
350.1 Ammonia
Laboratory:Pace Analytical Services - Minneapolis
Associated Lab Samples:10709087003, 10709087005
Parameter Units
Blank
Result
Reporting
Limit Qualifiers
METHOD BLANK:5073584
Associated Lab Samples:10709087003, 10709087005
Matrix:Water
Analyzed
Nitrogen, Ammonia mg/L ND 0.10 09/29/24 10:48
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
5073585LABORATORY CONTROL SAMPLE:
LCSSpike
Nitrogen, Ammonia mg/L 2.52.5 100 90-110
Parameter Units
MS
Result
% Rec
Limits Qual% RecConc.
5073586MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
MSSpike
Result
10708917002
5073587
MSD
Result
MSD
% Rec RPD RPD
Max
MSDMS
Spike
Conc.
Nitrogen, Ammonia mg/L 2.5 98 90-11097 1 202.50.43 2.9 2.9
Parameter Units
MS
Result
% Rec
Limits Qual% RecConc.
5073588MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
MSSpike
Result
10707410002
5073589
MSD
Result
MSD
% Rec RPD RPD
Max
MSDMS
Spike
Conc.
Nitrogen, Ammonia mg/L 2.5 96 90-11096 0 202.50.080J 2.5 2.5
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 10/07/2024 03:21 PM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 9 of 15
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
10709087
24-08573 Pit741 Scandia 2024
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
QC Batch:
QC Batch Method:
Analysis Method:
Analysis Description:
971091
SM 4500-P B
SM 4500-P F
SM4500P-F, Total Phosphorus
Laboratory:Pace Analytical Services - Minneapolis
Associated Lab Samples:10709087003, 10709087005
Parameter Units
Blank
Result
Reporting
Limit Qualifiers
METHOD BLANK:5074762
Associated Lab Samples:10709087003, 10709087005
Matrix:Water
Analyzed
Phosphorus mg/L ND 0.10 10/02/24 13:19
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
5074763LABORATORY CONTROL SAMPLE:
LCSSpike
Phosphorus mg/L 2.72.5 109 90-110
Parameter Units
MS
Result
% Rec
Limits Qual% RecConc.
5074764MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
MSSpike
Result
10708954004
5074765
MSD
Result
MSD
% Rec RPD RPD
Max
MSDMS
Spike
Conc.
Phosphorus mg/L M1562880-120621 1 205ND31.4 31.1
Parameter Units
MS
Result
% Rec
Limits Qual% RecConc.
5074766MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
MSSpike
Result
10708954005
5074767
MSD
Result
MSD
% Rec RPD RPD
Max
MSDMS
Spike
Conc.
Phosphorus mg/L M15119080-1201160 2 2050.14 59.7 58.2
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 10/07/2024 03:21 PM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 10 of 15
#=QL#
QUALIFIERS
Pace Project No.:
Project:
10709087
24-08573 Pit741 Scandia 2024
DEFINITIONS
DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot.
ND - Not Detected at or above adjusted reporting limit.
TNTC - Too Numerous To Count
J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
MDL - Adjusted Method Detection Limit.
PQL - Practical Quantitation Limit.
RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and
bias for a specific analyte in a specific matrix.
S - Surrogate
1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is
a combined concentration.
Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values.
LCS(D) - Laboratory Control Sample (Duplicate)
MS(D) - Matrix Spike (Duplicate)
DUP - Sample Duplicate
RPD - Relative Percent Difference
NC - Not Calculable.
SG - Silica Gel - Clean-Up
U - Indicates the compound was analyzed for, but not detected.
N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for
each analyte is a combined concentration.
Reported results are not rounded until the final step prior to reporting. Therefore, calculated parameters that are typically reported as
"Total" may vary slightly from the sum of the reported component parameters.
Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes.
TNI - The NELAC Institute.
ANALYTE QUALIFIERS
Analyte was detected in the associated method blank.B
Matrix spike recovery exceeded QC limits. Batch accepted based on laboratory control sample (LCS) recovery.M1
Re-extraction or re-analysis could not be performed due to insufficient sample amount.P2
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 10/07/2024 03:21 PM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 11 of 15
#=CR#
QUALITY CONTROL DATA CROSS REFERENCE TABLE
Pace Project No.:
Project:
10709087
24-08573 Pit741 Scandia 2024
Lab ID Sample ID QC Batch Method QC Batch Analytical Method
Analytical
Batch
10709087001 970495 970625Potable Well WI MOD DRO WI MOD DRO
10709087002 970495 970625Production Well WI MOD DRO WI MOD DRO
10709087003 970495 970625PondWI MOD DRO WI MOD DRO
10709087004 970495 970625PZ-3 WI MOD DRO WI MOD DRO
10709087005 970495 970625PZ-6 WI MOD DRO WI MOD DRO
10709087003 970864PondSM 2540D
10709087005 970864PZ-6 SM 2540D
10709087003 970791PondEPA 350.1
10709087005 970791PZ-6 EPA 350.1
10709087003 971091 971168PondSM 4500-P B SM 4500-P F
10709087005 971091 971168PZ-6 SM 4500-P B SM 4500-P F
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 10/07/2024 03:21 PM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 12 of 15
001
002
003
004
005
Page 13 of 15
9/25/2024
Page 14 of 15
Page 15 of 15
pacelabs.com 1700 Elm Street SE, Minneapolis, MN 55414
January 3, 2025
Mr. Paul Schultz
Barton Sand and Gravel
P.O. Box 1480
Maple Grove, MN 55311-6480
RE: Pace Field Project No. 24-08822 Lab ID: 10718386
Client Project ID: Barton Sand & Gravel – Annual Scandia Pit 741
Dear Mr. Shultz,
Enclosed are the analytical results for our recent monitoring event at Barton Sand & Gravel Elk
River Pit 718, Pace® Field P/N: 24-08822 and Pace® Lab P/N: 10718386. The enclosed
materials relate to the Annual 2024 Resample monitoring event for the sampling conducted at
Scandia site on December 10, 2024. There was no sample collected at the "Pond" sample
point, since the pond was frozen over and unsafe to collect sample.
Please note that WIDRO results were “ND”, or Not-Detected, at all wells.
Results reported herein conform to the applicable TNI/NELAC Standards and the laboratory's
Quality Manual, where applicable, unless otherwise noted in the
body of the report.
If you have any questions concerning this report, please feel free to contact me.
Sincerely,
Riley Jacobson
Field Scientist I
612-280-5475
State of Minnesota Laboratory No. 027-053-137
CC: Ms. Christina Morrison
#=CL#
December 16, 2024
LIMS USE: FR - RILEY JACOBSON
LIMS OBJECT ID: 10718386
10718386
Project:
Pace Project No.:
RE:
Riley Jacobson
Pace Analytical Services - Field Services
1700 Elm Street SE
Minneapolis, MN 55414
24-08822 Scandia Resample
Dear Riley Jacobson:
Enclosed are the analytical results for sample(s) received by the laboratory on December 11, 2024. The results relate only
to the samples included in this report. Results reported herein conform to the applicable TNI/NELAC Standards and the
laboratory's Quality Manual, where applicable, unless otherwise noted in the body of the report.
The test results provided in this final report were generated by each of the following laboratories within the Pace Network:
• Pace Analytical Services - Minneapolis
If you have any questions concerning this report, please feel free to contact me.
Sincerely,
Annika Asp
annika.asp@pacelabs.com
Project Manager
(612)607-1700
Enclosures
cc:Brad Jacobson, Pace Analytical Services - Field Services
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 1 of 10
#=CP#
CERTIFICATIONS
Pace Project No.:
Project:
10718386
24-08822 Scandia Resample
Pace Analytical Services, LLC - Minneapolis MN
1700 Elm Street SE, Minneapolis, MN 55414
Alabama Certification #: 40770
Alaska Contaminated Sites Certification #: 17-009
Alaska DW Certification #: MN00064
Arizona Certification #: AZ0014
Arkansas DW Certification #: MN00064
Arkansas WW Certification #: 88-0680
California Certification #: 2929
Colorado Certification #: MN00064
Connecticut Certification #: PH-0256
DoD Certification via A2LA #: 2926.01
EPA Region 8 Tribal Water Systems+Wyoming DW
Certification #: via MN 027-053-137
Florida Certification #: E87605
Georgia Certification #: 959
GMP+ Certification #: GMP050884
Hawaii Certification #: MN00064
Idaho Certification #: MN00064
Illinois Certification #: 200011
Indiana Certification #: C-MN-01
Iowa Certification #: 368
ISO/IEC 17025 Certification via A2LA #: 2926.01
Kansas Certification #: E-10167
Kentucky DW Certification #: 90062
Kentucky WW Certification #: 90062
Louisiana DEQ Certification #: AI-03086
Louisiana DW Certification #: MN00064
Maine Certification #: MN00064
Maryland Certification #: 322
Michigan Certification #: 9909
Minnesota Certification #: 027-053-137
Minnesota Dept of Ag Approval: via MN 027-053-137
Minnesota Petrofund Registration #: 1240
Mississippi Certification #: MN00064
Missouri Certification #: 10100
Montana Certification #: CERT0092
Nebraska Certification #: NE-OS-18-06
Nevada Certification #: MN00064
New Hampshire Certification #: 2081
New Jersey Certification #: MN002
New York Certification #: 11647
North Carolina DW Certification #: 27700
North Carolina WW Certification #: 530
North Dakota Certification (A2LA) #: R-036
North Dakota Certification (MN) #: R-036
Ohio DW Certification #: 41244
Ohio VAP Certification (1700) #: CL101
Oklahoma Certification #: 9507
Oregon Primary Certification #: MN300001
Oregon Secondary Certification #: MN200001
Pennsylvania Certification #: 68-00563
Puerto Rico Certification #: MN00064
South Carolina Certification #:74003001
Tennessee Certification #: TN02818
Texas Certification #: T104704192
Utah Certification #: MN00064
Vermont Certification #: VT-027053137
Virginia Certification #: 460163
Washington Certification #: C486
West Virginia DEP Certification #: 382
West Virginia DW Certification #: 9952 C
Wisconsin Certification #: 999407970
Wyoming UST Certification via A2LA #: 2926.01
USDA Permit #: P330-19-00208
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 2 of 10
#=SS#
SAMPLE SUMMARY
Pace Project No.:
Project:
10718386
24-08822 Scandia Resample
Lab ID Sample ID Matrix Date Collected Date Received
10718386001 Potable Well Water 12/10/24 10:30 12/11/24 07:17
10718386002 Production Well Water 12/10/24 10:05 12/11/24 07:17
10718386003 PZ-3 Water 12/10/24 08:50 12/11/24 07:17
10718386004 PZ-6 Water 12/10/24 08:10 12/11/24 07:17
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 3 of 10
#=SA#
SAMPLE ANALYTE COUNT
Pace Project No.:
Project:
10718386
24-08822 Scandia Resample
Lab ID Sample ID Method
Analytes
ReportedAnalysts
10718386001 Potable Well WI MOD DRO 2HJN
10718386002 Production Well WI MOD DRO 2HJN
10718386003 PZ-3 WI MOD DRO 2HJN
10718386004 PZ-6 WI MOD DRO 2HJN
PASI-M = Pace Analytical Services - Minneapolis
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 4 of 10
#=AR#
ANALYTICAL RESULTS
Pace Project No.:
Project:
10718386
24-08822 Scandia Resample
Sample:Potable Well Lab ID:10718386001 Collected:12/10/24 10:30 Received:12/11/24 07:17 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit
Analytical Method: WI MOD DRO Preparation Method: WI MOD DRO
Pace Analytical Services - Minneapolis
WIDRO LV GCS
WDRO C10-C28 ND mg/L 12/13/24 18:3912/12/24 07:290.096 1
Surrogates
n-Triacontane (S)83 %.12/13/24 18:3912/12/24 07:2950-150 1
Sample:Production Well Lab ID:10718386002 Collected:12/10/24 10:05 Received:12/11/24 07:17 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit
Analytical Method: WI MOD DRO Preparation Method: WI MOD DRO
Pace Analytical Services - Minneapolis
WIDRO LV GCS
WDRO C10-C28 ND mg/L 12/13/24 18:4712/12/24 07:290.096 1
Surrogates
n-Triacontane (S)84 %.12/13/24 18:4712/12/24 07:2950-150 1
Sample:PZ-3 Lab ID:10718386003 Collected:12/10/24 08:50 Received:12/11/24 07:17 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit
Analytical Method: WI MOD DRO Preparation Method: WI MOD DRO
Pace Analytical Services - Minneapolis
WIDRO LV GCS
WDRO C10-C28 ND mg/L 12/13/24 18:5512/12/24 07:290.096 1
Surrogates
n-Triacontane (S)107 %.12/13/24 18:5512/12/24 07:2950-150 1
Sample:PZ-6 Lab ID:10718386004 Collected:12/10/24 08:10 Received:12/11/24 07:17 Matrix:Water
Parameters Results Units DF Prepared Analyzed CAS No.QualReport Limit
Analytical Method: WI MOD DRO Preparation Method: WI MOD DRO
Pace Analytical Services - Minneapolis
WIDRO LV GCS
WDRO C10-C28 ND mg/L 12/13/24 19:0312/12/24 07:290.096 1
Surrogates
n-Triacontane (S)81 %.12/13/24 19:0312/12/24 07:2950-150 1
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 12/16/2024 05:44 PM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 5 of 10
#=QC#
QUALITY CONTROL DATA
Pace Project No.:
Project:
10718386
24-08822 Scandia Resample
Results presented on this page are in the units indicated by the "Units" column except where an alternate unit is presented to the right of the result.
QC Batch:
QC Batch Method:
Analysis Method:
Analysis Description:
984127
WI MOD DRO
WI MOD DRO
WIDRO Low Volume GCS
Laboratory:Pace Analytical Services - Minneapolis
Associated Lab Samples:10718386001, 10718386002, 10718386003, 10718386004
Parameter Units
Blank
Result
Reporting
Limit Qualifiers
METHOD BLANK:5141293
Associated Lab Samples:10718386001, 10718386002, 10718386003, 10718386004
Matrix:Water
Analyzed
WDRO C10-C28 mg/L ND 0.10 12/13/24 17:46
n-Triacontane (S)%.88 50-150 12/13/24 17:46
Parameter Units
LCS
Result
% Rec
Limits Qualifiers% RecConc.
5141294LABORATORY CONTROL SAMPLE & LCSD:
LCSSpike LCSD
% Rec RPD
Max
RPD
LCSD
Result
5141295
WDRO C10-C28 mg/L 0.640.8 79 75-115820.66 3 20
n-Triacontane (S)%.86 50-15089
Parameter Units
MS
Result
% Rec
Limits Qual% RecConc.
5141296MATRIX SPIKE & MATRIX SPIKE DUPLICATE:
MSSpike
Result
10718542001
5141297
MSD
Result
MSD
% Rec RPD RPD
Max
MSDMS
Spike
Conc.
WDRO C10-C28 mg/L 0.8 79 75-11598 19 200.8ND 0.68 0.82
n-Triacontane (S)%.86 50-150108
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 12/16/2024 05:44 PM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 6 of 10
#=QL#
QUALIFIERS
Pace Project No.:
Project:
10718386
24-08822 Scandia Resample
DEFINITIONS
DF - Dilution Factor, if reported, represents the factor applied to the reported data due to dilution of the sample aliquot.
ND - Not Detected at or above adjusted reporting limit.
TNTC - Too Numerous To Count
J - Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit.
MDL - Adjusted Method Detection Limit.
PQL - Practical Quantitation Limit.
RL - Reporting Limit - The lowest concentration value that meets project requirements for quantitative data with known precision and
bias for a specific analyte in a specific matrix.
S - Surrogate
1,2-Diphenylhydrazine decomposes to and cannot be separated from Azobenzene using Method 8270. The result for each analyte is
a combined concentration.
Consistent with EPA guidelines, unrounded data are displayed and have been used to calculate % recovery and RPD values.
LCS(D) - Laboratory Control Sample (Duplicate)
MS(D) - Matrix Spike (Duplicate)
DUP - Sample Duplicate
RPD - Relative Percent Difference
NC - Not Calculable.
SG - Silica Gel - Clean-Up
U - Indicates the compound was analyzed for, but not detected.
N-Nitrosodiphenylamine decomposes and cannot be separated from Diphenylamine using Method 8270. The result reported for
each analyte is a combined concentration.
Reported results are not rounded until the final step prior to reporting. Therefore, calculated parameters that are typically reported as
"Total" may vary slightly from the sum of the reported component parameters.
Pace Analytical is TNI accredited. Contact your Pace PM for the current list of accredited analytes.
TNI - The NELAC Institute.
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 12/16/2024 05:44 PM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 7 of 10
#=CR#
QUALITY CONTROL DATA CROSS REFERENCE TABLE
Pace Project No.:
Project:
10718386
24-08822 Scandia Resample
Lab ID Sample ID QC Batch Method QC Batch Analytical Method
Analytical
Batch
10718386001 984127 984490Potable Well WI MOD DRO WI MOD DRO
10718386002 984127 984490Production Well WI MOD DRO WI MOD DRO
10718386003 984127 984490PZ-3 WI MOD DRO WI MOD DRO
10718386004 984127 984490PZ-6 WI MOD DRO WI MOD DRO
REPORT OF LABORATORY ANALYSIS
This report shall not be reproduced, except in full,
without the written consent of Pace Analytical Services, LLC.Date: 12/16/2024 05:44 PM
Pace Analytical Services, LLC
1700 Elm Street
Minneapolis, MN 55414
(612)607-1700
Page 8 of 10
Page 9 of 10
12/12/2024
Page 10 of 10
2024 Annual Report
Recycling Facility
Barton Sand & Gravel Co. / Martin Marietta – Scandia
A Martin Marietta Materials, Inc. company
Facility: Barton Sand & Gravel Co. / Martin Marietta – Scandia
22303 Manning Trail
Scandia, MN
Reporting Year: 2024
Type and weight of materials handled at the facility:
During 2024, approximately 24,000 tons of recycled asphalt products (RAP) were
imported to the site for recycling and 30,000 tons of RAP was used in the production of
hot mix asphalt or similar.
Quantity of chunks processed during reporting year: 0 tons
Quantity of chunks on-site at year end: 17,000 tons
Quantity of RAP on-site at year end: 71,000 tons
The distribution of materials by weight: see above
Approximate weight of material being stored for greater than one year:
Chunks: 17,000 tons
RAP: 10,000 tons
Concrete and asphalt chunks 100,000 tons $180,000 to process material Barton Sand & Gravel Co.
$180,000
$PODSFUFBOEBTQIBMUDIVOLTXJMMCFQSPDFTTFE DSVTIFE
UPQSPEVDFSFDZDMFDMBTT
XIJDIJTBTBMFBCMFQSPEVDU
DPNNPOMZVTFEJOSPBEDPOTUSVDUJPO
/"
/"
/"
/"
#BSUPO4BOE(SBWFM$P
)FNMPDL-BOF/
.BQMF(SPWF
./
4UFWFO%4BVFS
April8
20
&YFDVUJWF71$00
Minnesota District Office
7200 Hemlock Lane, Suite 200, PO Box 1480, Maple Grove, MN 55311
www.martinmarietta.com
Interoffice Memorandum
DATE: 01/24/2025
TO: Washington County
FROM: Bobby Foust
Safety Manager
SUBJECT: Solid Waste Facility License – Personnel Training Records
This memo is to certify that all Martin Marietta Materials, Inc. field personnel undergo initial and 8-
hours of annual refresher safety training including Emergency Action notification and response
procedures. This training is conducted for all Minnesota field employees prior to the operating season
each calendar year.
Records of training are maintained for all employees in our Maple Grove office. If you have any
questions, I can be reached at (763)425-4191.
1
TJ Hofer
From:Dave Hume <dave.hume@lrewater.com>
Sent:Monday, March 10, 2025 10:59 PM
To:TJ Hofer
Cc:k.morell@ci.scandia.mn.us; b.eklund@ci.scandia.mn.us
Subject:Tiller 2025 AOP Application - Groundwater Monitoring Data Review
Attachments:Groundwater Elevations All Monitoring Locations (through 10_17_24).pdf
T.J.,
LRE Water has reviewed the 2024 groundwater monitoring data in Tiller’s (Martin Marietta) 2025 AOP
Application for their operation on Manning Ave. All groundwater levels, water quality, and pumping
volumes reported are in compliance. The well and pond hydrographs (attached) have been updated to
include the 2024 water level data through October 16, 2024. Annual precipitation data from the National
Weather Service for the Minneapolis-St. Paul area are also included on the graph.
2024 Groundwater Monitoring Data Review
The 2024 groundwater monitoring was completed in accordance with the approved
monitoring plan.
Groundwater samples were collected from the monitoring well and piezometers, and
production well and potable well on September 24, 2024, and December 10, 2024. As required by
the monitoring plan, select samples were analyzed for total suspended solids, am monia nitrogen,
phosphorus, and Diesel Range Organics (DRO). DRO was not detected above the method
detection limit in any of the samples. These rand the other analyte results indicate no
groundwater quality concerns. The pond was not sampled due to ice cover.
The groundwater flow direction across the site is generally to the north and is consistent
with previous data.
From October 2023 through April 2024, groundwater levels across the site showed
continued to decrease and following the same general trend that has been observed since the fall
of 2020. From April 2024 through August 2024, levels increased by approximately 1 foot, then
decreased a slight amount over the last few months of the year. The water level changes result
from local and regional changes in precipitation and are unrelated to mining operations and
pumping the production well. This is shown by the annual precipitation data that is plotted with
water levels on the attached hydrograph (Figure 1). The water levels and precipitation show
similar trends over time.
2024 Pumping
The production well pumped approximately 17 million gallons in 2024, which is below the
permitted amount of 30 million gallon per year.
2
2024 Recommendations
Continue the annual sampling for water quality parameters as outlined in the monitoring
plan.
Continue to map the area(s) of excavation into the water table.
Provide the approximate maximum depth of excavation below the water table during the
2025 operation year.
If you have any questions or need additional information, please contact me.
Regards,
Dave Hume, PG
LRE Water | A Spheros Environmental Company
612-805-0919
Dave.Hume@lrewater.com
LREWATER.COM
U:\5028SCA02_Scandia Tiller Manning 2023-2024\2025 AOP Application\Groundwater Elevations - All Wells (through 10_17_24)
GW Elev All Wells
10
15
20
25
30
35
40
45
910
912
914
916
918
920
922
924
An
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a
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P
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e
c
i
p
i
t
a
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Date
FIGURE 1
GROUNDWATER AND POND ELEVATIONS WITH ANNUAL PRECIPITATION VS. TIME
2008 through 2024
TILLER (MARTIN MARIETTA) MINE
SCANDIA, MINNESOTA
PZ-4 PZ-5 MW-1
MW-2 (aband. June 2011)PZ-6 Prod Well
PZ-3 Pond Annual Precipitation
Note: Annual precipiation from National Weather Service Mnneapolis-St. Paul Area
https://www.dnr.state.mn.us/climate/historical/acis_stn_data_monthly_table.html?sid=mspthr&snam
1
TJ Hofer
From:Kyle Morell <k.morell@ci.scandia.mn.us>
Sent:Thursday, February 27, 2025 10:19 AM
To:TJ Hofer
Subject:Fw: Questions for Tiller re: 2025 AOP Application
Attachments:Outlook-nonn4fet; Questions for Tiller re groundwater and 2025 AOP.docx
Kyle H. Morell
City Administrator
City of Scandia
14727 209th Street North
Scandia, MN 55073
Phone: 651.433.2274 Fax: 651-433-5112
Cell: 651.245.2654
Web: www.cityofscandia.com
Email: k.morell@ci.scandia.mn.us
From: jon lindel <jon.scandia@gmail.com>
Sent: Wednesday, February 26, 2025 2:37 PM
To: Kyle Morell <k.morell@ci.scandia.mn.us>; b.eklund <b.eklund@ci.scandia.mn.us>
Subject: Questions for Tiller re: 2025 AOP Application
Kyle, see attached Qs that are pertinent to the Tiller AOP and groundwater impacts. Pls forward to Tiller
and others who will be advising the Scandia Council on the AOP Application.
Questions for Tiller re: groundwater and mining in Scandia
1) What is the depth of excavation measured from the ground level at
the common border for Tiller and adjacent property of Lindell and to
the bottom of the created lake on Tiller property directly north of the
Tiller/Lindell border?
2) Item 12 of the AOP discusses water monitoring. What is the extent of
groundwater level monitoring? Provide historical groundwater depth
that Tiller monitors near the Tiller/Lindell border.
3) Provide details, including a summary of PCA investigation of Tillers
chemical contaminations in the Tiller mine in the past.
4) Explain the Washington County response to Tiller ’s request to
excavate into the groundwater prior to Scandia becoming a city when
regulatory oversight changed. Include dates and decisions by
Washington County in text. Confirm whether Washington County
prohibited excavation into the groundwater.
5) Provide an ariel photo of the Lindell pond that is current as of 2024
that includes the Tiller boundary with Lindell property. This photo
should be in color and represent the same mapping as was shown in
Tiller’s March 10, 2022 response to Lindell email. This is identified as
Item 1 of Tiller’s response, which is an aerial photo through
Washington County dated 2020.
1
TJ Hofer
From:jon lindel <jon.scandia@gmail.com>
Sent:Friday, March 7, 2025 9:35 AM
To:Kyle Morell; TJ Hofer; b.eklund
Subject:Fwd: Pics
Attachments:IMG_20241112_152553191_BURST000_COVER.jpg; IMG_20241024_131820078_HDR.jpg;
IMG_20241024_131811377_HDR.jpg
Kyle and TJ,
This is my recommendation for the Council to address the groundwater issue with Tiller that has
rreduced my pond to about 60%
of its prvious coverage and depth. I am attaching three photos to this email - one that shows the
significant dropoff near my property due to excavation,
the other two show the loss off water in the pond. This area was formally covered in water and now its
dryed up and filled with
vegitation. I think a site visit later this Spring would be appropiate and confirm my claims.
I will send another email after this one that contains an explanation of how groundwater works. My pond
was spring fed prior
to the massive excavation near my property by Tiller. All this information will be useful to the Council to
understand and make informed
decisions.
My recommendations for the Council regarding the Annual Operating Permit Application (AOP).
1) Deny the AOP request to excavate any further into the groundwater. This would be consistent
with Washington County Board's previous mining restrictions when it approved mining operations
prior to when Scandia became a city and took over review and approval of mining operating conditions.
2) Require that Tiller respond and cooperate with inquiries from Jon Lindell and other parties including
the DNR.
3) Increase the mining setback requirement from all adjoining properties to 200 feet.
4) Require that Tiller and/or its successor Martin Marietta provide a water restoraration plan that restores
water levels to the Lindell pond prior to when excavation into the groundwater was requested and
permitted by
the Scandia Council.
jl
1
TJ Hofer
From:jon lindel <jon.scandia@gmail.com>
Sent:Friday, March 7, 2025 9:38 AM
To:Kyle Morell; TJ Hofer; b.eklund
Subject:Fwd: groundwater flow explained
This explanation would be helpful to the Council for its consideration of Tiller's AOP.
Subject: groundwater flow explained
Groundwater flow is the movement of water underground through soil and rock. It's a vital
part of the water cycle, supplying water to wells, rivers, lakes, and wetlands.
How does groundwater flow occur?
Gravity and pressure: Gravity and pressure differences drive groundwater flow.
Permeability: The size and connectivity of spaces in soil and rock affects the speed
and direction of groundwater flow.
Hydraulic head: Water pressure affects the rate of groundwater flow.
Why is groundwater flow important?
Water resources: Groundwater flow is essential for managing water resources and
protecting groundwater quality.
Ecosystems: Groundwater flow is vital for maintaining ecosystems.
Drought and flooding: Understanding groundwater flow helps address issues
related to drought and flooding.
Upper Midwest Region
7200 Hemlock Lane, Suite 200, PO Box 1480, Maple Grove, Minnesota 55311
t.(763) 425-4191 f. (763) 425-7173
www.martinmarietta.com
March 13, 2025
Kyle Morell, City Administrator
City of Scandia
14727 209th St. N
Scandia, MN 55073
Dear Mr. Morell:
This letter is written in response to a list of questions from Mr. John Lindell, to the City of Scandia and
received by Tiller Corporation, a Martin Marietta Materials, Inc. company (herein referred to as Tiller) on
March 3, 2025 regarding Tiller’s 2025 AOP Application for our Scandia mine (Site).
Tiller takes comments from its’ neighbors seriously. The email received from Mr. Lindell prompted
an evaluation of the matters raised and Tiller offers the following responses:
1.What is the depth of excavation measured from the ground level at the common border for Tiller and
adjacent property of Lindell and to the bottom of the created lake on Tiller property directly north of
the Tiller/Lindell border?
The depth of excavation from the ground level at the common border of Tiller and Lindell
property to the lake is approximately 80 feet and the depth of excavation to the bottom of the
created lake has varied from between 15 ft and 50 ft feet below the water table during years
when mining below the water table has occurred.
2.Item 12 of the AOP discusses water monitoring. What is the extent of groundwater level monitoring?
Provide historical groundwater depth that Tiller monitors near the Tiller/Lindell border.
The water level monitoring network consists of five (5) wells and one (1) staff gauge located in
the on-site pond. The water levels are collected monthly while operating and are provided in the
annual report to the City. The groundwater level data has been reported since 2006 and includes
19 years of data to-date. The closest water level monitoring point to the Tiller/Lindell border
would be well “MW-1” which is approximately 850 linear feet to the east of the Lindell border.
3.Provide details, including a summary of PCA investigation of Tillers chemical contaminations in the
Tiller mine in the past.
Tiller operates its’ mining sites with a great deal of corporate responsibility. Tiller has substantial
safeguards built into its’ operations as a result of the various permitting requirements and
March 13, 2025
Page 2
company polices. Safeguards include proper storage and handling of fuels, equipment
maintenance protocols, spill prevention, spill response and reporting policies, maintaining a spill
clean-up kit, and on-going routine employee training. All of this is documented in the Spill
Prevention Control and Countermeasure Plan (SPCC) for the Site.
The reason so many safeguards are in place is that we are operating in areas where sand and
gravel are present. Sand and gravel are permeable materials. The equipment operating at our
various sites is mechanical in nature. Equipment contains and operates on petroleum products
including fuels, hydraulic oils and lubricating oils. It is known that mechanical equipment can
breakdown or fail. In certain instances, these breakdowns or failures may cause a petroleum
release. For this reason, Tiller is very diligent about having our SPCC Plans, safeguards, and training
up-to-date and in place.
During any given year, we will have hundreds of pieces of equipment operating and thousands of
customer trucks visiting our various sites. Company-wide, any spills of five gallons or more of
petroleum products or any volume of hazardous materials are reported to the State Duty Officer
as required by applicable State statutes and regulations (Minn. Stat. 299K).
There have not been any Minnesota Pollution Control Agency investigations of the Tiller Site in
the 2000’s. If a reportable spill occurs, it is reported to the Minnesota State Duty Officer and
cleaned-up in accordance with the rules.
The groundwater quality data collected to-date indicates that there has not been any
contamination or degradation of groundwater.
4. Explain the Washington County response to Tiller’s request to excavate into the groundwater prior to
Scandia becoming a city when regulatory oversight changed. Include dates and decisions by
Washington County in text. Confirm whether Washington County prohibited excavation into the
groundwater.
The Conditional Use Permit (CUP) issued by Washington County that was in effect prior to
Scandia’s incorporation as a city set a maximum excavation depth above the groundwater
because the mining phases that were active at that time had not yet extended to the
groundwater table. The County issued five-year permits and the 2005 CUP application supplied
by Tiller included mining below the groundwater table. The Site had undergone two
environmental assessment worksheets (EAW) in the past and mining into the unconfined
aquifer was evaluated during both processes. The County followed-up with additional review
which resulted in an extension to the permitting process such that the additional review
intercepted the timeline in which New Scandia Township incorporated as a City in 2007 and
became the permitting authority of the Site. In 2008, the City of Scandia issued a CUP to Tiller
which based on the results of the EAW allowed mining below the groundwater table.
Washington County does not prohibit excavation into the groundwater. The Washington County
Development Code, Chapter Seven Mining Regulations, Section 5.5 Protection of Water Tables
states that, “Excavation into unconfined (emphasis added) aquifers must be closely monitored
March 13, 2025
Page 3
and conducted according to the conditions of the permit.” The County and the City both allow
mining into unconfined aquifers. In addition, they both prohibit excavation into confined
aquifers. Excavation into the groundwater at the Scandia Site is taking place in an unconfined
aquifer.
5. Provide an aerial photo of the Lindell pond that is current as of 2024 that includes the Tiller boundary
with Lindell property. This photo should be in color and represent the same mapping as was shown in
Tiller’s March 10, 2022 response to Lindell email. This is identified as Item 1 of Tiller’s response,
which is an aerial photo through Washington County dated 2020.
Please find the requested aerial photo, an updated Washington County Drought Monitoring
Report, as well as the March 10, 2022 response.
Please let me know if you have any questions or require additional information on this matter. I may be
reached at (763) 425-4191.
Sincerely,
Christina Morrison
Regional Land Manager
Enc
0 200 400100Feet¯
2024 Aerial Ph oto - Scandia
Tiller Prope rty
Tiller Prope rty
Aerial Photo Source: Washington County
218th Street
Linde ll Property
Minnesota District
7200 Hemlock Lane, Suite 200, PO Box 1480, Maple Grove, Minnesota 55311
t. (763) 425-4191 f. (763) 425-7173
www.martinmarietta.com
March 10, 2022
Ken Cammilleri, City Administrator
City of Scandia
14727 209th St. N
Scandia, MN 55073
Dear Mr. Cammilleri:
This letter is written in response to an email dated March 7, 2022 from Mr. John Lindell, to the City of
Scandia and received by Tiller Corporation, a Martin Marietta Materials, Inc. company (herein referred to
as Tiller) on March 7, 2022 regarding Tiller’s 2022 AOP Application for our Scandia mine (Site). The email
from Mr. Lindell expressed three separate matters, which include: utilizing current aerial imagery for use
in the AOP application, changes to the surface expression for nearby wet features and mining into the
groundwater. Tiller takes comments from its neighbors seriously. The email received from Mr. Lindell
prompted an evaluation of the matters raised and Tiller offers the following responses.
1. Matters Pertaining to Use of Aerial Imagery in the AOP
a. Mr. Lindell recommends that Tiller’s AOP approval be delayed and Tiller provides an accurate, up
to date aerial photo of the mining property and adjacent properties.
The City of Scandia requires aerial photos to be included in the AOP for the purpose of showing
the active mining area and location of the active stockpiling area.
Figure 3: Aerial Photo includes an aerial photo captured by an unmanned aerial vehicle (UAV) for
areas within the Site, dated September 13, 2021. The aerial photo shows the active mining area
and location of the active stockpiling area, which complies with the City’s required use of aerial
imagery in the AOP. Use of the UAV is limited to Tiller property.
For areas outside of the Tiller property, the most current aerial photo available through
Washington County is used, which is dated 2020.
2. Matters Pertaining to the Surface Expression of Nearby Features
a. Mr. Lindell shared observations that “ponds” on and near his property have exhibited a drier
surface expression more recently in comparison to a few years ago when a wetter surface
expression was present.
These observations are not surprising when considering the precipitation and estimated relative
soil moisture conditions during this timeframe within our local region. Review of the
precipitation trends is important because surface water in the form of precipitation is largely
March 10, 2022
Page 2
what influences the characteristics of the shallow depressions associated with the moraine
southwest of the Site. The shallow wet depressions and wetland features located in the area
have been described in the past as being perched, which means the feature is underlain by a low
permeability layer that allows water to perch. These features have water levels that are perched
above the regional water table, thereby relying more on precipitation to maintain wet
characteristics.
With this in-mind, we could expect to see changes in the surface expression of these features in
response to precipitation and climatic trends. The precipitation graph shown below as Figure 1:
Annual Precipitation (2016-2021) illustrates annual precipitation from 2016 through 2021 for
the Lower St. Croix River area. From 2016 through 2018, there was a decline in annual
precipitation followed by a substantial peak in annual precipitation in 2019 and a subsequent
decline through 2021. The peak in annual precipitation for the years mentioned above occurred
in 2019 and correlates with observations that wetter conditions occurred a few years ago.
Figure 1: Annual Precipitation (2016-2021)
We can also look at the Palmer Drought Severity Index (PDSI) to inform on the surface expression
of the wetlands in the subject area. The PDSI is a standardized index based on a simplified soil
water balance and estimates relative soil moisture conditions. The magnitude of PDSI indicates
the severity of the departure from normal conditions. A PDSI value >4 represents very wet
conditions, while a PDSI <-4 represents an extreme drought. Figure 2: PDSI (2016-2021) illustrates
the PDSI in the month of July for the Lower St. Croix River area from 2016 through 2021. As shown
in the figure, from 2016 through 2018 there was a decline in the PDSI or estimate of the relative
soil moisture conditions. Then, in 2019 and 2020, the PDSI indicates very wet conditions followed
by significant drought conditions in 2021.
March 10, 2022
Page 3
With the exception of a spike in precipitation in 2019, the annual precipitation had been declining
over the last six years in the Lower St. Croix River area. The PDSI also indicates a downward trend
in estimated relative soil moisture conditions for the last six years during the month of July, with
the exception of the very wet conditions in July of 2019 and July 2020. The drought conditions in
2021 represent a more significant departure toward dry conditions experienced more recently.
The variations in precipitation and estimated relative soil moisture help demonstrate the range in
seasonal variations that can occur each year. For features in the landscape that are influenced by
and respond to precipitation and soil moisture, it can be expected that observable changes will
occur in response to these conditions as they change over time.
A review of a few aerial photos, both historical and recent helps illustrate the range in surface
expressions for the shallow depressions in the area. To provide an area of reference, a yellow
outline is made around the wet perimeter of a feature located in the area subject to Mr. Lindell’s
comment. The yellow outline is based on the wet perimeter as indicated on a 2020 Washington
County aerial photo. Aerial images included are 1970, 2009 and 2020.
3. Matters Pertaining to Mining into the Groundwater
a. Mr. Lindell describes that when Scandia became a City and assumed regulatory authority over
mining, Tiller was authorized to excavate into the groundwater and goes on to suggest that
Washington County prohibits excavation into groundwater.
Washington County does not prohibit excavation into the groundwater. The Washington County
Development Code, Chapter Seven Mining Regulations, Section 5.5 Protection of Water Tables
states that, “Excavation into unconfined (emphasis added) aquifers must be closely monitored
and conducted according to the conditions of the permit.” The County and the City both allow
mining into unconfined aquifers. In addition, they both prohibit excavation into confined
Figure 2: PDSI (2016-2021)
March 10, 2022
Page 4
aquifers. Excavation into the groundwater at the Scandia Site is taking place in an unconfined
aquifer.
Tiller operates its’ mining sites with a great deal of responsibility. As a leader in the aggregate mining
industry in Minnesota, Tiller recognizes the importance of protecting our water resources. Tiller has and
will continue to operate the Site in accordance with local, state and federal rules and regulations.
Please let me know if you have any questions or require additional information on this matter. I may be
reached at (763) 425-4191.
Sincerely,
Christina Morrison, P.G.
Environmental Engineer II
Enc
Tiller Property
Tiller Property
218th Street
¯0 200 400100Feet
1970 Aerial Photo - Scandia
Aerial Photo Source: HIG
Tiller Property
Tiller Property
218th Street
¯0 200 400100Feet
2009 Aerial Photo - Scandia
Aerial Photo Source: NAIP
Tiller Property
Tiller Property
218th Street
¯0 200 400100Feet
2020 Aerial Photo - Scandia
Aerial Photo Source: Washington County