10.a Martin Marietta AOP - CC Packet1 | P a g e
Date of Meeting: March 19, 2024
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 2, 2024
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, has applied for its 2024 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 (CUPs) granted by the City on May 20, 2008. 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
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mining and processing of aggregate, the production of hot-mix asphalt, and the recycling of
concrete and asphalt products.
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 and
operates both sites. The City issued a CUP for mining and processing at the Dresel site on May
20, 2008. As the owner of both sites, Tiller is to comply with the conditions of both the Tiller
and Dresel CUPs. Issues and compliance with each are discussed in this report.
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. The conditions
included the items noted in the table that follows. Tiller’s performance is indicated in the table
on the following pages. There were no issues identified in 2023 for the Tiller Mine site.
Condition
Deadline
Specified in
CUP
Notes
1. Comply with CUP Ongoing In process--monitored by City staff and
consultants
2. 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
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 2023 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. Data collected in
accordance with the short-term monitoring
plan was submitted to the City in August
2022.
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.
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Condition
Deadline
Specified in
CUP
Notes
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
Excavation into the groundwater table is
expected to occur within the 2024 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
Tiller and are available to the City. Water
pumped at the site in 2023 was 9,226,194
gallons. The DNR Water 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.
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Condition
Deadline
Specified in
CUP
Notes
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. Monitoring results were included
with the application and reviewed by LRE
Water. No DRO were detected in the
samples in 2023.
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
2023.
13. Truck Signage and
Roadway Cleaning July 20, 2008
Washington County has posted signs on
Lofton and Manning Avenues per their
County requirements. Tiller 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
breaking on the road. Signage was in place
during the City site visit in 2023.
14. Lofton/ Highway 97
Intersection July 20, 2008
Tiller 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.
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Condition
Deadline
Specified in
CUP
Notes
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 31,
2021, 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. Tiller Corporation now owns and
operates this site, and therefore must also comply with the conditions of the Dresel CUP. There
were no issues identified in 2023 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
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
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Condition
Deadline
Specified in
CUP
Notes
monitoring well MW-2 in 2013. The site
complied with the plan in 2023.
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
contaminants were detected in 2023
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 2023 site visit.
12. Truck Cleaning Ongoing Trucks must meet requirements for
cleaning, per CUP. No issues were
identified during the 2023 site visit.
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Condition
Deadline
Specified in
CUP
Notes
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 31,
2021, and determined to be complete.
Proposed Operating Conditions, Deviations from Previous Year, and Ordinance
Requirements
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 2023. No mining activities occurred
on the Dresel site in 2023. 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
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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, or 2022.
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:
2022 2023
Amount of material removed from the
site (in tons) 378,000 229,000
Amount of add-rock brought onto site
(in tons) 92,000 44,000
Recycled asphalt and concrete brought
to the site (in tons) 41,000 22,000
Average number of trips to and from
the site each day (in trips/day) 214 140
The application anticipates that mining and processing will continue at the site in 2024. The level
of activity will depend on market demand for the site’s products. The Site Plan identifies the
Potential Mining Areas for 2024, 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
2024 application as it relates to groundwater quality and quantity. Below are the 2024
Groundwater Monitoring Data Review Comments from LRE Water:
• The 2023 groundwater monitoring was completed in accordance with the approved
monitoring plan.
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• Groundwater samples were collected from the monitoring well and piezometers, pond,
production well and potable well on September 6, 2023. These were analyzed for Diesel
Range Organics (DRO) as outlined in the monitoring plan. DRO was not detected above
the method detection limit in any of the samples. These results and the other groundwater
chemistry results indicate no groundwater quality concerns.
• The groundwater flow direction across the site is generally to the north and is consistent
with previous submittals.
• From October 2022 through August 2023, groundwater levels across the site continued to
show same general decreasing trend that has been observed since the fall of 2020. Levels
dropped another 0.5 to 1 feet. The most recent levels measured on October 2022 are still
approximately 3 to 4 feet higher than the lowest levels measured in 2010. Levels did
show a slight increase of approximately 0.5 to 1 foot from August to October 2023. The
water level trends are the result of local and regional changes in precipitation, and
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 9.2 million gallons in 2023, 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.
• Continue to map the area(s) of excavation into the water table.
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 2023
inspection indicated that the setbacks were maintained and still meet City requirements.
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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 2023 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 operation are
specifically authorized by the City.”
Tiller requested, and the City approved, four extended hours requests in 2023. The
requests were for improvement projects on city roads in Dellwood and county roads in
North Branch/Chisago County. In 2022, there were eight 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
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 Tiller 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. Tiller plans to continue such practices as needed in
2024.
6. Noise
The Applicant must comply with all Federal, State, and City noise standards. In the fall of
2023, Martin Marietta received three complaints regarding noise activity before 7:00 a.m.
Through discussions between the City, operator, and neighbor it was deemed that sound
generated from the repositioning of equipment in preparation of starting operations at
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7:00 a.m. may have caused the complaint. The applicant has adjusted equipment
preparation activity and no further complaints occurred.
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 2023, excavation
into the groundwater table did occur to a level of 910 amsl.
Excavation into the groundwater table is anticipated in 2024. If excavation into the
groundwater table occurs in 2024, it would occur within the 2024 Potential Mining Area
as depicted on their submitted site plan.
8. Site Clearance
Site clearing activities occurred in 2023 along the northeast perimeter of the 2023
proposed mining area. If clearing activity occurs in 2024, it will occur within the 2024
Potential Mining Areas as depicted on Figure 2, Site Plan.
9. Appearance/Condition
The City’s site inspection in 2023 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 2023.
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 2023
confirmed that the Applicant is meeting the requirements of the CUP.
12. Water Quality Monitoring Plan
The CUP required that Tiller Corporation 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. Tiller submitted monitoring
results for 2023 with its application for the 2024 AOP. LRE Water reviewed the
groundwater monitoring activities and found that no DRO (diesel range organics) were
detected in the samples in 2023.
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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 two 32,000-gallon tanks. There is also a 20,000 gallon above-ground
used oil storage tank. The used oil is utilized as an alternative fuel supply for the asphalt
plant. All tanks containing asphalt cement and used oil 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 Tiller staff at the 2023 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.
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 2023 verified that the processing facilities meet the setback
requirements of the CUP, and no violations of permits were reported in 2023.
16. Recycling
Recycling at the site is permitted by Chapter 154. Asphalt production used approximately
30,000 tons of recycled asphalt products (RAP) in 2023. 22,000 tons of RAP was brought
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into the site in 2024; at year-end there were 40,000 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 Tiller 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 2023 was approximately 140 trucks per day.
The proposed conditions for the 2024 AOP are the same as those included in previous
AOPs, which require that Tiller 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.
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 2023.
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
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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 2023 included placement of overburden and topsoil material along the
slopes of 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 2024. These
areas are shown on Figure 2, Site Plan as 2024 Potential Reclamation Activity. Some of the areas
shown as potential reclamation will also see active mining during 2024. Once mining is
complete, reclamation may advance into these areas during 2024.
Comments
Carnelian-Marine-St. Croix Watershed District Comments
The CMSCWD provided the following comment:
The summary of 2023 activities and planned 2024 activities are all in line with previous
reviews, conditions of the CMSCWD permit, and appears to be in line with Scandia’s
CUP and Operating Conditions. Mining boundary limits have not changed from 2023. No
further comments to the City.
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.
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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 Tiller Corporation Scandia Mining Operation on
September 21, 2023, including documenting conditions on the site. The site visit reviewed
activities and site conditions based on the CUP and 2023 AOP, and discussed expected activity
in 2024.
ACTION REQUESTED
The City Council can:
1. Approve the AOP, with or without conditions
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 2024 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 occurs, maps
submitted for the 2024 AOP shall identify the general areas where excavation depth is
below the water table.
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4. 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.
5. 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.
6. 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.
7. 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
c. Haul loads are required to be covered
8. 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.
9. The reclamation activities shall meet the requirements of the Conditional Use Permit,
including soil and planting requirements.
10. 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.
11. The applicant shall pay all fees and escrows associated with this application.
12. This Annual Operating Permit shall expire on March 31, 2025.
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 03-19-24-09 Approving the AOP for Martin Marietta Mine
B. Location Map
18 | P a g e
C. Application
D. Applicant’s Narrative
E. Comments from David Hume of LRE Water
CITY OF SCANDIA, MINNESOTA
RESOLUTION 03-19-24-09
RESOLUTION APPROVING THE 2024 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 19, 2024.
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 occurs, maps
submitted for the 2024 AOP shall identify the general areas where excavation depth is
below the water table.
4. 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.
5. 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.
6. 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.
7. 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
8. 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.
9. The reclamation activities shall meet the requirements of the Conditional Use Permit,
including soil and planting requirements.
10. 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.
11. The applicant shall pay all fees and escrows associated with this application.
12. This Annual Operating Permit shall expire on March 31, 2025.
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 19th day of March, 2024.
Christine Maefsky, 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 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,
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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 2024 Application for the Annual Operators Permit dated January 2024.
Martin Marietta Sand and Gravel Mining Operation
1/31/2024
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 2024
APPLICATION FOR
2024 ANNUAL OPERATORS PERMIT
Scandia, MN
Consulting Civil Engineers
Martin Marietta Page 1
2024 Annual Operators Permit Application
January 2024
APPLICATION FOR ANNUAL OPERATORS PERMIT
MARTIN MARIETTA
SAND AND GRAVEL MINING OPERATION
CITY OF SCANDIA
WASHINGTON COUNTY, MINNESOTA
January 2024
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
2024 Annual Operators Permit Application
January 2024
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 on four separate occasions in 2023. 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.
Summary of Requests:
Saturday, June 10th from 7 a.m. to 5 p.m. to provide asphalt mix to a large
Dellwood City Streets Project. The extended hours were needed to keep
the project operating within the time constraints established for the road
construction project and minimize impacts to the traveling public.
Saturday, July 8th from 7 a.m. to 5 p.m. to provide asphalt mix to a large
Dellwood City Streets Project. The extended hours were needed to keep
the project on-schedule and minimize impacts to the traveling public.
Saturday, September 30th from 7 a.m. to 5 p.m. to provide asphalt mix to
the CR-21 Project in North Branch. The extended hours were needed to
keep the project operating within the time constraints established for the
road construction project and minimize impacts to the traveling public.
Saturday, October 7th from 7 a.m. to 5 p.m. to provide asphalt mix to the
CR-21 Project in North Branch. The extended hours were needed to keep
the project on-schedule and minimize impacts to the traveling public.
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 2024.
6. Noise: All activities are conducted so as to be in accordance with all Federal, State
and City noise standards.
Between August 8th – August 24th, Martin Marietta received three complaints about
noise-generating activity before 7:00 a.m. Through discussions between the City,
operator, and neighbor it was deemed that sound generated from the repositioning
of equipment in preparation of starting operations at 7:00 a.m. might have been the
cause for complaint. The operator made adjustments to equipment preparation
activity and no further complaints occurred.
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
Martin Marietta Page 3
2024 Annual Operators Permit Application
January 2024
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 occurred in 2023 along the northeast perimeter
of the 2023 proposed mining area. If clearing activity occurs in 2024, it will occur
within the 2024 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.
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 2023. 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. In 2023, a 20,000 gallon above-
ground used oil storage tank was removed and is in the process of being replaced
with an additional 32,000 gallon asphalt cement storage tank. 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.
Martin Marietta Page 4
2024 Annual Operators Permit Application
January 2024
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.
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.
Martin Marietta Page 5
2024 Annual Operators Permit Application
January 2024
5. Excavation Below Water Table: In 2023, excavation into the groundwater table
occurred. The depth of excavation in 2023 was to approximately 910 feet amsl,
which is well above the approved minimum excavation elevation of 865 feet amsl
established in previous AOP’s. In 2024, excavation into the groundwater table is
expected to occur within the 2024 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. Results have been
supplied to the City. 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.
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 amsl 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 229,073 tons of material was
removed in 2023.
Martin Marietta Page 6
2024 Annual Operators Permit Application
January 2024
2. Amount of add-rock brought onto the site: Approximately 43,875 tons of Class A, Class
B, Class C and Class D add-rock were imported to the site in 2023.
3. Area reclaimed and type of reclamation: Reclamation activities in 2023 included
placement of overburden and topsoil material along the slopes of 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 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 2024 Potential
Reclamation Activity. Some of the areas shown as potential reclamation will also see
active mining during 2024. Once mining is complete, reclamation may advance into
these areas during 2024.
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 2023 was
approximately 140 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
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 2024 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 are anticipated to the QM Lab/Scale Office building located on-
site, primarily involving the construction of a new roof for the building. There are no
anticipated changes to the footprint or location of the building.
The 2024 production schedule anticipates mining and processing in 2024. The exact area
of excavation will depend on the required gradation of the end products. Mining anticipated
during 2024 will occur within the 2024 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 December 14,2023
aerial photo and identifies the Mining Limit, the Tiller Mine property boundary and the
Dresel Mine property boundary.
Martin Marietta Page 7
2024 Annual Operators Permit Application
January 2024
Site Plan: Figure 2, Site Plan, is attached which illustrates the 2024 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 2024. These areas are shown on Figure 2, Site Plan as 2024 Potential
Reclamation Activity.
Operating Conditions for 2024: The 2024 production schedule anticipates mining and
processing during 2024. Mining will occur within the 2024 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
September 21, 2023.
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 26, 2024 Reg. No. 21842
Tables
Table 1: Scandia Groundwater Elevation Data
All water level data colelcted and reported by Martin Marietta staff
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
10/17/2023 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
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
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
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
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
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
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
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
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
Page 1 of 4
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
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
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
Page 2 of 4
PZ-6
Date Diesel Range Organics mg/L Total Suspended Solids mg/L Nitrogen, Ammonia mg/L Phosphorous mg/L
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
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
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
Page 3 of 4
*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.
Page 4 of 4
Table 3 Production Well Records
Scandia Mine
Pumping Records: 2023
Production Well
Month Amount Pumped (Gal)
January 0
February 0
March 0
April 0
May 136,500
June 4,743,975
July 2,214,900
August 1,990,340
September 50,000
October 32,000
November 58,479
December 0
9,226,194 Total Pumped in 2023:
Water Appropriation Permit authorizes withdrawal of up to
30 million gallons per year.
Flow meter readings collected and reported by Martin Marietta staff
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 December 14, 2023 over active
portions of Mine and 2021 FSA Aerial Photo from Minnesota
Geospatial Image Service over remaining areas.
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
2024 POTENTIAL
MINING AREA
2024 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
2024 POTENTIAL
RECLAMATION
AREA
Maintain 50'
Wetland Setback
CURRENT LIMITS
OF EXCAVATION
INTO
GROUNDWATER
2024 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
12/28/16
KP
1 of 1
Figure 2
218421/24/2024
SITE PLAN
TILLER
CORPORATION
SCANDIA,
MINNESOTA
ANNUAL
OPERATORS PERMIT
NOTES:
1.TOPOGRAPHY WITHIN MINE LIMITS FROM 12/14/2023 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: \\KIRSTENSOLDPC\dwgs\a-Tiller - All\Tiller Scandia\Annual Operators Permit\AOP 2024\Figure 3 - 2024 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
10/18/07
1 of 7
Figure 3
218421/24/2024
GL7,8 2032 93-253
MINING AND
RECLAMATION
PLAN
600300300
TILLER
CORPORATION
SCANDIA,
MINNESOTA
ANNUAL
OPERATORS PERMIT
3/12/24, 8:44 AM Mail - TJ Hofer - Outlook
https://outlook.office.com/mail/inbox/id/AAMkADFjNzJlYjA5LWIwODgtNGY1Ny1hNjQyLWZmNzY5YjJlMTJkMABGAAAAAABnWVF1sVCLT7CuDtObP…1/1
Tiller 2024 AOP Application Review - LRE Water
Dave Hume <dave.hume@lrewater.com>
Mon 3/11/2024 2:39 PM
To: TJ Hofer <tj.hofer@bolton-menk.com>
Cc: Brenda Eklund <b.eklund@ci.scandia.mn.us>
1 attachments (185 KB)
Groundwater Elevations - All Wells (through 10_17_23).pdf;
T.J.,
LRE Water (LRE) has reviewed the groundwater monitoring data in Tiller’s (Martin Marietta) 2024 AOP Application for the Tiller/Dresel Mine 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 2023 water level data through October 17, 2023. Annual precipitation
data from the National Weather Service for the Minneapolis-St. Paul area are also included on the graph.
2023 Groundwater Monitoring Data Review
· The 2023 groundwater monitoring was completed in accordance with the approved monitoring plan.
· Groundwater samples were collected from the monitoring well and piezometers, pond, production well and potable well on September 6, 2023.
These were analyzed for Diesel Range Organics (DRO) as outlined in the monitoring plan. DRO was not detected above the method detection limit
in any of the samples. These results and the other groundwater chemistry results indicate no groundwater quality concerns.
· The groundwater flow direction across the site is generally to the north and is consistent with previous submittals.
· From October 2022 through August 2023, groundwater levels across the site continued to show same general decreasing trend that has been
observed since the fall of 2020. Levels dropped another 0.5 to 1 feet. The most recent levels measured on October 2022 are still approximately 3 to
4 feet higher than the lowest levels measured in 2010. Levels did show a slight increase of approximately 0.5 to 1 foot from August to October
2023. The water level trends are the result of local and regional changes in precipitation, and 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.
2023 Pumping
The production well pumped approximately 9.2 million gallons in 2023, which is below the permitted amount of 30 million gallon per year.
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.
Please let me know if you have any questions, or need additional information.
Thanks,
Dave Hume, PG
Sr. Project Manager & VP Midwest Operations
Cell: 612-805-0919
Dave.Hume@LREwater.com
https://dg01.redatatech.com/onprem_image_fetch?
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LREWATER.COM
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U:\5028SCA01_Scandia Tiller Manning Pre 2023\2024 AOP Application\Groundwater Elevations - All Wells (through 10_17_23).xlsx
GW Elev All Wells
10
15
20
25
30
35
40
45
910
912
914
916
918
920
922
924
An
n
u
a
l
P
r
e
c
i
p
i
t
a
t
i
o
n
(
i
n
c
h
e
s
)
El
e
v
a
t
i
o
n
(
f
t
a
m
s
l
)
Date
FIGURE 1
GROUNDWATER AND POND ELEVATIONS WITH ANNUAL PRECIPITATION VS. TIME
5/2008 - 10/17/2023
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&sname