10.a1 Application_Scandia Mine AOPSunde Engineering, PLLC.
10830 Nesbitt Avenue South • Bloomington, Minnesota 55437-3100
Phone: (952) 881-3344 • Fax: (952) 881-1913 • E-Mail: info@sundecivil.com
January 2022
a Martin Marietta Materials, Inc. Company
APPLICATION FOR
2022 ANNUAL OPERATORS PERMIT
Scandia, MN
Consulting Civil Engineers
Tiller Corporation Page 1
2022 Annual Operators Permit Application
January 2022
APPLICATION FOR ANNUAL OPERATORS PERMIT
TILLER CORPORATION
SAND AND GRAVEL MINING OPERATION
CITY OF SCANDIA
WASHINGTON COUNTY, MINNESOTA
January 2022
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
“Tiller”) 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 Materials, Inc. acquired Tiller in April 2021. Tiller 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 the
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.
Tiller Corporation Page 2
2022 Annual Operators Permit Application
January 2022
It was noted during the November 2021 inspection with the City that several of the
“No Trespassing” signs installed along 218th Street were in need of replacement
and/or maintenance. In December 2021, Tiller completed the replacement of several
signs along 218th Street and Lofton Ave.
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 2021. As part of the request for extended
hours, Tiller asked to be notified if the City received any complaints regarding the
extended hours of operations. Tiller 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, May 22nd from 8 a.m. to 4:00 p.m. in order to provide asphalt mix
to a state aid project located on US Hwy 8 in Chisago County. 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 travelling public.
Tuesday, July 6th from 5 a.m. to 7 a.m. in order to produce the asphalt mix
and store it in the insulated silos so that it is ready-to-go for a large state aid
project on US Hwy 61 by 7:00 a.m. that morning.
Monday, July 26th from 5 a.m. to 7 a.m. in order to produce the asphalt mix
and store it in the insulated silos so that it is ready-to-go for a large project
on CR-3 by 7:00 a.m. that morning.
Monday, August 9th from 5 a.m. to 7 a.m. in order to produce the asphalt
mix and store it in the insulated silos so that it is ready-to-go for a large
project on CR-3 by 7:00 a.m. that morning.
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 2022. In July 2021,
approximately 4,300 gallons of calcium chloride was applied to unpaved portions of
the haul road from Lofton Avenue to the asphalt plant.
6. Noise: All activities are conducted so as to be in accordance with all Federal, State
and City noise standards.
7. Depth of excavation: Depth of excavation will not be lower than 922 feet above mean
sea level (msl) for the property described in Resolution No. 05-20-08-02, approving
Tiller Corporation Page 3
2022 Annual Operators Permit Application
January 2022
the Conditional Use Permit Application of Dresel Contracting for Sand and Gravel
Mining Processing. On the balance of the property, the depth of excavation below
the water table will not be lower than 865.87 feet msl.
8. Site clearance: Site clearing activities did not occur in 2021. Clearing activity is not
anticipated in 2022. If clearing activity occurs, it will occur within the 2022 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 2021. 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 which is located within a steel secondary
containment area and a 1000-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.
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 on file
with the City of Scandia.
Tiller Corporation Page 4
2022 Annual Operators Permit Application
January 2022
15. Added Provisions: The 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.
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 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.
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.
Tiller Corporation Page 5
2022 Annual Operators Permit Application
January 2022
4. Groundwater Monitoring Plan: A monitoring plan with protocols is on file with the
City.
5. Excavation Below Water Table: In 2021, excavation into the groundwater table did
not occur. In 2022, excavation into the groundwater table is expected to occur within
the 2022 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 maximum excavation elevation of 865 feet msl has been established in
previous AOP’s.
11. Truck Hauling Signs: Washington County has posted Lofton and Manning Avenues
per the County’s requirements. Tiller has posted signs on 218th Street per the City
of Scandia requirements.
At the request of the City, Tiller made application to Washington County to install a
“No Engine Braking” sign on northbound Manning Trail North near the entrance to
the site to address an increase in concerns over engine braking on Manning Trail
North. Washington County authorized the sign and the sign was initially installed
early September 2020. Since the site typically operates seasonally, the sign is
installed only during the construction season and, at the County’s request, removed
during the off-season.
12. Lofton/Hwy 97 Intersection: Tiller restricts importing add-rock from Lofton Ave. N.
during non-daylight hours as defined in their CUP.
13. 228th Street Sign: Tiller 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.
Tiller Corporation Page 6
2022 Annual Operators Permit Application
January 2022
C. Annual Activity
1. Amount of material removed from the site: Approximately 430,000 tons of material was
removed in 2021.
2. Amount of add-rock brought onto the site: Approximately 77,000 tons of Class A, Class
B, Class C and Class D add-rock were imported to the site in 2021.
3. Area reclaimed and type of reclamation: Reclamation activities in 2021 included
seeding and mulching an area south of the Scandia Mine/Dresel Mine common mining
border. Placement of overburden and suitable fill material along the slopes of the
mining area, north of the Scandia Mine/Dresel Mine common mining border is ongoing.
The completed and ongoing reclamation areas are indicated on Figure 2, Site Plan.
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 2022. These areas are shown on Figure 2, Site Plan as 2022
Potential Reclamation Activity. Some of the areas shown as potential reclamation will
also see active mining during 2022. Once mining is complete, reclamation may
advance into these areas during 2022.
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 2021 was
approximately 225 trucks per day.
D. Description of operating conditions planned for the coming year:
During the 2022 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.
The 2022 production schedule anticipates mining and processing in 2022. The exact area
of excavation will depend on the required gradation of the end products. Mining anticipated
during 2022 will occur within the 2022 Potential Mining Area and some of the Potential
Reclamation Areas as indicated on Figure 2, Site Plan.
Aerial Photo: Figure 1, Aerial Photo, is attached which includes a September 13, 2021
aerial photo and identifies the Mining Limit, the Tiller Mine property boundary and the
Dresel Mine property boundary.
Site Plan: Figure 2, Site Plan, is attached which illustrates the 2022 potential active mining
area, reclamation area, stockpile and processing area, reclaimed area and the current
limits of excavation into groundwater.
Tiller Corporation Page 7
2022 Annual Operators Permit Application
January 2022
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 2022. These areas are shown on Figure 2, Site Plan as 2022 Potential
Reclamation Activity.
Operating Conditions for 2022: The 2022 production schedule anticipates mining and
processing during 2022. Mining will occur within the 2022 Potential Mining Area as
indicated on Figure 2, Site Plan. The exact area of excavation will depend on the required
gradation of the end products.
E. Inspection:
The City conducts an annual inspection of the site. The last inspection occurred on
November 12, 2021.
III. CERTIFICATION
I certify that the plans, specifications or reports for the
above described facility were prepared by me or under my
direct supervision and that I am a duly Registered
Professional Engineer under the laws of the State of
Minnesota.
Kirsten Pauly
Date: January 27, 2022 Reg. No. 21842
Tables
Table 1: Scandia Groundwater Elevation Data
Groundwater elevation levels are recorded in feet above mean sea level
NM=Not Measured (due to obstruction)
MW‐2 Taken out of service 6/21/2011
PZ‐4 Taken out of service 5/12/2020
914.99 = Apparent incorrect reading at time of field visit
Date
Scandia
Production
Well Scandia PZ‐3 Scandia PZ‐4 Scandia PZ‐5 Scandia PZ‐6 Scandia MW‐1 Scandia MW‐2
Scandia On‐
Site Pond
10/20/2021 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
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
Table 1 Scandia Groundwater Elevation Data
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
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
2
Table 1 Scandia Groundwater Elevation Data
Date
Scandia
Production
Well Scandia PZ‐3 Scandia PZ‐4 Scandia PZ‐5 Scandia PZ‐6 Scandia MW‐1 Scandia MW‐2
Scandia On‐
Site Pond
3/28/2008 914.07 914.11
2/22/2008 914.16 914.18
1/9/2008 914.30 NM
12/12/2007 914.48 NM
11/8/2007 914.70 914.74
10/11/2007 914.64 914.68
9/11/2007 914.60 914.64
7/19/2007 914.77 914.82
6/13/2007 914.85 914.91
5/2/2007 915.06 915.11
9/6/2006 915.87 915.90
3
Table 2 Water Quality Monitoring Results
Potable Well:
Date Diesel Range Organics Total Suspended Solids Nitrogen, Ammonia Phosphorous
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 Total Suspended Solids Nitrogen, Ammonia Phosphorous
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 0.053 ND
Table 2: Page 1
Table 2 Water Quality Monitoring Results
PZ‐3:
Date Diesel Range Organics Total Suspended Solids Nitrogen, Ammonia Phosphorous
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 Total Suspended Solids Nitrogen, Ammonia Phosphorous
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
PZ‐6
Date Diesel Range Organics Total Suspended Solids Nitrogen, Ammonia Phosphorous
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
Table 2: Page 2
Table 2 Water Quality Monitoring Results
Pond
Date Diesel Range Organics Total Suspended Solids Nitrogen, Ammonia Phosphorous
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
*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.
Table 2: Page 3
Table 3 Production Well Records
Scandia Mine
Pumping Records: 2021
Production Well
Month Amount Pumped (Gal)
January 0
February 0
March 0
April 1,755,558
May 10,578,538
June 2,750,784
July 274,400
August 254,800
September 127,400
October 156,800
November 9,800
December 0
15,908,079 Total Pumped in 2021:
Water Appropriation Permit authorizes withdrawal of up to
20 million gallons per year.
Figures
TILLER
MINE
MINING
LIMITS
MINING
LIMITS
MINING
LIMITS
DRESEL
MINE
COMMON
MINING
BORDER
Engineering, PLLC.
Sunde
Figure 1
Aerial Photo
Annual Operators Permit
Aerial image from Kespry Aerial Photo (collected via UAV
on September 13, 2021) over active portions of Mine and
Washington County 2020 over remaining areas.
PEMBgPEMBPEMBPEMBPEMCPSS1BPEMBPUBGPEMBPEMCPEMBPEMBPEMBPSS1BPEMCPEMCxPEMBPEMCPEMCPUBGPUBGPFO1CPEMCPSS1/3BPEM/SS1BPEMCPEMAPEMCPEMCPEMCPEMBPEMB SS1PSS1BPEMCPEMCPSS1BPEMCPEMCPUBG218TH ST. N.PSSIBPEMFPEMCPEMCMW-1PZ-5PZ-6PZ-3PRODUCTIONWELLSCALE HOUSEWELLSTOCKPILE ANDPROCESSINGAREA(Future Mining)RECLAIMEDAREARECLAIMEDAREARECLAIMEDAREAMININGLIMITSSCREENING BERMLOCKINGGATEMININGLIMITSMININGLIMITSRECLAIMEDAREAHAUL RD. TOLOFTON AVE.DRESEL MINETILLER MINECOMMON MINING BORDERCURRENT LIMITSOF EXCAVATIONINTOGROUNDWATER2022 POTENTIALMINING AREA2022 POTENTIALMINING AREAHAULROADLOCKINGGATELOCKINGGATE SCREENING BERMMaintain 50'Wetland Setback2022 POTENTIALRECLAMATIONAREAMaintain 50'Wetland Setback2022 POTENTIAL RECLAMATION AREA -INCLUDES RECLAMATION OF A PORTIONOF THE GROUNDWATER PONDSTAFF GAUGEINSTALLED ATNORTH END OFGROUNDWATERPONDCURRENT LIMITSOF EXCAVATIONINTOGROUNDWATERSHEET NO:DATE:DRAWN BY:CHECKED BY:SCALE:APPROVED BY:PROJECT NO.:REG. NO.:DATE:I HEREBY CERTIFY THAT THIS PLAN,SPECIFICATION, OR REPORT WAS PREPAREDBY ME OR UNDER MY DIRECT SUPERVISIONAND THAT I AM A DULY LICENSEDPROFESSIONAL ENGINEER UNDER THE LAWSOF THE STATE OF MINNESOTA.DESCRIPTION:INFORMATION:REVISIONDATEEngineering, PLLC.CONSULTING CIVIL ENGINEERS10830 NESBITT AVENUE SOUTHBLOOMINGTON, MINNESOTA 55437(952) 881-3344 TELEPHONE(952) 881-1913 FAXwww.sundecivil.comSundeKirsten Pauly 93-253KPGraphic12/28/16KP1 of 1Figure 2218421/19/2022SITE PLANTILLERCORPORATIONSCANDIA,MINNESOTAANNUALOPERATORS PERMITNOTES:1.TOPOGRAPHY WITHIN MINE LIMITS FROM 9/13/2021 UMV FLIGHT.REMAINING TOPOGRAPHIC INFORMATION FROM 2011 LiDARELEVATION, 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 SUBDIVIDEDINTO RESIDENTIAL LOTS OF FIVE (5) ACRES OR LESS(NOT APPLICABLE)·100' FROM ROAD R-O-WPROCESSING AREA SHOWN REFLECTS CURRENTCONDITION. PROCESSING AREAS WILL CHANGEWITH THE PROGRESSION OF MINING. MULTIPLEPROCESSING OPERATIONS MAY BE LOCATEDTHROUGHOUT THE PROCESSING AREA ORAREAS. CERTAIN PROCESSING OPERATIONSREQUIRE EQUIPMENT TO BE PLACED NEAR THEVARIOUS MATERIALS NEEDED TO MAKE SPECIFICPRODUCTS AND OTHER PROCESSINGOPERATIONS NEED TO BE PLACED IN A MANNERTHAT AVOIDS CONFLICTS WITH THE ACTUALMINING.ADDITIONAL MINING MAY BE REQUIRED IN POTENTIALRECLAMATION AREAS.
Mining Limit9509809709409509609709809909309
5
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9
6
0
9
7
0970 9809909
8
0
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1000 10109309409609801000950960970980940950960930940950960970980950950
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970
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96
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0
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0
950 960930980990970 950950960
960940
95096093
0 W.E.933.322044Z 995.73022045Z 989.82011043E 692146.185N 120313.24022046Z 950.800MANNING AVENUE EAST 1223.25S 89°22'12" W 1422.96S 89°41'05" W 1287.61S 89°19'52" W 1277.99N 89°57'12" E 2649.44S 89°44'30" E 693.00N 89°52'27" E 983.08N 5°42'43" E 6
2
3
.
5
1
N 89°37'35" E631.03R = 2291.82
= 0°26'05"
L = 17.39
R = 1909.86
= 9°57'32"
L = 331.96
N 12°23'
4
6
"
E
9
0
6
.
9
4
N 1°25'56" E 1420.46
N 0°35'31" W 1317.76
S 1°01'20" E 1325.79
S 41°53'22" W363.70 S 17°44'22" W428.16L = 331.96 = 9°57'32"R = 1909.86L = 331.96 = 9°57'32"R = 1909.86L = 331.96 = 9°57'32"R = 1909.86249.34 S 0°01'45" W 659.62
S 0°33'43" E 1319.60
1978.57
50' SETBACK4:1 SLOPESS 89°31'35"W65.46NSP CO. EASEMENTR = 1980.97
= 20°29'54"
L = 674.38 963.2955.5958.5956.9964.4962.4969.7962.4958.2962.9961.3970950970960940972.8960.2973.8968.9966.3959.2951.3945.2942.6945.6962.4945.2940.8940.2944.2950.7954.4957.6958.3957.6953.7948.8962.3956.1961.9972.7994.9969.4969.6965.5981.3974.5930.4939.9956.8968.6974.4959.0928.2958.2962.9986.750' SETBACKGATELOFTON ROAD970980960950940920930950960990
980
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940
930
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940930 916±100 FEETVARIESMINIMUM TOPSOIL ANDSEEDED TO ESTABLISHNATIVE VEGETATION6:1 SLOPE FOR AHORIZONTALDISTANCE OF 100'SLOPE VARIES- 4:1 MAX.146:1 SLOPE61VARIESSLOPE VARIES- 3:1 MAX.13TYPICAL SECTION EDGE OF WATER BODYDEPTHVARIES218TH ST. N.LOFTON AVE. N.10001000990980970970980990970980960950940920930950960990
980
970
960
950
940
930
920
940930920950960970980990960960950920
9409301000
9309409509609709809901000932934936938922924926928930940950960PROPOSED FUTURE LAKE CONFIGURATIONWATER ELEVATION AT 916+/-BOTTTOM OF LAKE AT 870-8904.ISHEET NO:DATE:DRAWN BY:CHECKED BY:SCALE:APPROVED BY:PROJECT NO.:REG. NO.:DATE:I HEREBY CERTIFY THAT THIS PLAN,SPECIFICATION, OR REPORT WAS PREPAREDBY ME OR UNDER MY DIRECT SUPERVISIONAND THAT I AM A DULY LICENSEDPROFESSIONAL ENGINEER UNDER THE LAWSOF THE STATE OF MINNESOTA.DESCRIPTION:INFORMATION:REVISIONDATET. , R. , S. #DRAWING: \\kirstensoldpc\DWGS\a-Tiller - All\Tiller Scandia\Annual Operators Permit\AOP 2022\Figure 3 - 2012 AOP Mining and Reclamation Plan.dwg LAYOUT: C3 11x17Engineering, PLLC.CONSULTING CIVIL ENGINEERS10830 NESBITT AVENUE SOUTHBLOOMINGTON, MINNESOTA 55437(952) 881-3344 TELEPHONE(952) 881-1913 FAXwww.sundecivil.comSundeKIRSTEN PAULY 93-253 KPGraphic10/18/07 1 of 7Figure 3218421/18/2021 GL7,8 2032 93-253MINING ANDRECLAMATIONPLAN600300300TILLERCORPORATIONSCANDIA,MINNESOTAANNUALOPERATORS PERMIT