Loading...
9.a Discussion on approval of 2018 Annual Operating Plan for the Tiller Corp Scandia mine Memorandum To: Scandia City Council Reference: Tiller Corporation— 2018 Annual Operating Permit Application for Scandia Mine Copies To: Neil Soltis, City Administrator Mike Caron, Tiller Corporation Christina Morrison, Tiller Corporation Kirsten Pauley, Sunde Engineering Project No.: 16622.003 From: Sherri Buss, RLA AICP, Planner Routing: Date: February 12, 2018 SUBJECT: Tiller Corporation, Inc. – 2018 Annual Operating Permit (AOP) Application for a Mining and Processing Operation MEETING DATE: February 20, 2018 LOCATION: Sections 7 and 8, Township 32 North, Range 20 West; all that part of the south half of the Northwest Quarter of Section 35,Township 32, Range 20, Washington County, Minnesota; and Section 17, Township 32, Range 20 APPLICANT: Tiller Corporation P.O. Box 1480 Maple Grove, Minnesota 55311 60-DAY PERIOD: April 1, 2018 ZONING: Aggregate Mining Overlay District ITEMS REVIEWED: Application, Plans and Related Submittals; subconsultant and agency comments, site visit findings Scandia City Council Tiller Scandia Mine 2018 AOP Page 2 February 20, 2018 BRIEF DESCRIPTION OF THE REQUEST: Tiller Corporation has applied for its 2018 Annual Operating Permit (AOP) for an existing sand and gravel mining operation located on Manning Avenue near 225th Street in Scandia. The site has been actively mined since 1966, and currently operates under Conditional Use Permits (CUP’s) 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 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, so that permits can be approved before the start of the mining season in that year. The applications for the Scandia Mine Site since 2010 have included both the Tiller site and the adjacent site that was formerly the Dresel Mine site. The former Dresel site is south of Tiller’s Scandia Mine. Tiller purchased the Dresel site in 2009 and is operating 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 needs to comply with the conditions of both the Tiller and Dresel CUP’s. Issues and compliance with each are discussed in this report. EVALUATION OF THE AOP REQUEST The Applicant is requesting an Annual Operating Permit (AOP) for a mining and processing operation. The permit requirements are governed by the City’s Ordinance No. 103, Regulation of Mining and Related Activities, which is 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 CUP’s 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 REQUIREMENTS 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 on the table below. Tiller’s performance is also indicated on the table and in the text sections that follow: 2017 issues are identified in underlined text on the table. Scandia City Council Tiller Scandia Mine 2018 AOP Page 3 February 20, 2018 Condition Deadline Specified in CUP Status 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. 4. Permits from CMSCWD None specified * Current permit is dated July 10, 2008 and on file at the City. Tiller is in the process of renewing its 5-year Watershed District permit. Tiller will submit a copy of the approved permit to the City. 5. Installation of three Monitoring Wells July 20, 2008 + The required monitoring wells were installed in 2008. One well was taken out of service in 2011 to accommodate reclamation activities (MW -2). Tiller has sealed this well. Monitoring results for 2017 were provided with the AOP application and reviewed by Leggett, Brashears, and Graham, Inc. (LBG), 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 at the City. 7. Excavation below water table May not begin before August 20, 2008 + Excavation into the water table began in 2009. CUP permits mining into ground water to a depth of 50 feet. Excavation into the groundwater table occurred in 2013 to a depth of 15 to 20 feet. Tiller did not mine into the groundwater table in 2014 or 2015, but did mine approximately into the groundwater table in 2016 to about the same maximum depth as the mining activity in 2013. Excavation into the groundwater table did not occur in 2017, but may occur again in 2018. Water level data is collected on an ongoing basis and submitted to the City. Water level data has been submitted for this application, and LBG’s review and recommended conditions are discussed in the section on Groundwater Monitoring. 8. Production Well Records July 20, 2008 + Production well records are being kept by Tiller Corp. and are available to the City. Water pumped at the site in 2017 was 13,240,000 gallons. The DNR Water Scandia City Council Tiller Scandia Mine 2018 AOP Page 4 February 20, 2018 Condition Deadline Specified in CUP Status Notes Appropriation Permit for the site allows up to 20 million gallons to be used each year --18 million gallons per year for washing, and 2 million gallons per year for dust control. 9. Ground Water Analysis - DRO (Diesel Range Organics) and GRO None specified + Groundwater samples were analyzed for DRO. No gasoline is stored on site. If gasoline storage is added, GRO will be analyzed. Monitoring results were included with the application and reviewed by LBG. No DRO were detected in the samples in 2017. 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 feet below the water table, per the CUP. Excavation depth to date was approximately 15-20 feet into the groundwater table through 2017. 13. Truck Signage and Roadway Cleaning July 20, 2008 + Washington County has posted Lofton and Manning Avenues per County requirements. Tiller has posted signs on 218th Street and at Lofton Avenue to restrict trucks from using 228th Street per City of Scandia requirements. The signs were in place at the City site visit in 2017. 14. Lofton/Highway 97 Intersection July 20, 2008 + Tiller restricts importing add-rock from Lofton Avenue during non-daylight hours per the CUP requirements. The City received complaints regarding trucks on Lofton and 228th Street in January, 2018. 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 submitted on January 31, 2018 and determined to be complete. Scandia City Council Tiller Scandia Mine 2018 AOP Page 5 February 20, 2018 Dresel Mine Site 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. 2017 issues are identified in underlined text. Condition Deadline Specified in CUP Status 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. In May, 2017 excavations at the Dresel pit included some contaminated soils. Tiller reported the incident as required by the State of Minnesota and completed clean up and disposal of the contaminated soils. The incident is discussed in greater detail in the text below. 4. Permits from CMSCWD None specified * Tiller is required to renew its 5-year CMSCWD permit in 2018. The renewal is in process. Tiller will file a copy of the approved permit at the City. 5. Installation of Monitoring Wells July 20, 2008 + Installed in May, 2008. Groundwater Plan was updated to reflect changes to monitoring well MW -2 in 2013. Site complied with plan in 2017. 6. Revise Proposed Conditions Plan Pit Elevations July 20, 2008 + The City approved a maximum mining depth at 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. LBG review and recommendations are included for the 2018 AOP. 7. Ground Water Monitoring Plan July 20, 2008 + Approved in October, 2008 and on file at the City. 8. Revise Site Plan to 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 Scandia City Council Tiller Scandia Mine 2018 AOP Page 6 February 20, 2018 Condition Deadline Specified in CUP Status Notes added, GRO will be analyzed. No DRO or other contaminants detected in 2017 monitoring at the Dresel site. 11. Signage on 218th and Roadway Cleaning Ongoing + Signage was installed and meets the CUP requirements; inspected by City staff during 2017 site visit. 12. Truck Cleaning Ongoing + Trucks must meet requirements for cleaning per CUP. No issues identified in 2017. 13. Delineate Northern Wetland None specified + Wetland report and delineation completed. Buffer marked by September 15, 2008. Complaint received regarding encroachment into wetland in late 2014. Mitigation and replacement plan were completed and approved by TEP panel and wetland credits successfully withdrawn from the BWSR Wetland Bank in 2016. 14-17. Updated Reclamation Plan July 20, 2008 + Reclamation Plan revised as part of combined Reclamation Plan submitted for the Tiller site with the AOP application. 18. Letter of Credit/Security Before AOP approval + Financial guarantees are current. 19. AOP Application January 31 + Application submitted on January 31, 2018, and determined to be complete. OPERATING CONDITIONS - EVALUATION FOR THE AOP Site Operations - Background Information The Tiller mine site includes several parcels, as indicated on the Site Plan (Figure C-1). Excavation activities in 2010-2011 removed material between the Tiller site and former Dresel Mine site, merging the two sites into one. Tiller mined both sites in 2017. 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 site as needed to produce required mixes and materials. The Applicant indicated that the mining and reclamation activities within the site will continue to operate as they have in the past during the 2018 mining season, and will occur on both the Tiller and Dresel sites. Mining activity in 2017 focused on the southern end of the mine. Proposed active mining areas are indicated on the Site Plan (sheet C1). Mining will occur in both the east Scandia City Council Tiller Scandia Mine 2018 AOP Page 7 February 20, 2018 and west portions of the Scandia mine. Processing activities will also occur at the site in 2018. The site plan projects that nearly all of the Dresel site will be reclaimed by the end of 2018. Mining into the groundwater 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. Excavation depth to date is approximately 15-20 feet into the groundwater table. (The CUP allows mining into the groundwater to a maximum depth of 50 feet.) The AOP application indicates that mining into the groundwater table occurred in 2013, and did not occur in 2014, 2015, or 2017. Mining into the groundwater table occurred in 2016, and additional mining into the groundwater table may occur in 2018. Mining in 2016 stayed within the same depth range (15-20 feet into the groundwater table) as the mining that occurred previously, and the same depth limit is anticipated for 2018. The equipment that Tiller is using to mine into the groundwater is capable of mining to a maximum depth of 15-20 feet below grade. 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 as 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 2017 Activity. The application generally includes the data required by the ordinance regarding annual activity on the site, as follows: ___2017 2016 _____ The amount of material removed from the site: 413,000 Tons 353,000 Tons Amount of add-rock brought onto the site: 61,000 Tons* 272,200 Tons Recycled asphalt and concrete brought to the site: 30,000 CY 55,000 CY Average number of trips to and from the site each day: 195 Trips/day 253 Trips/day* *Past AOP’s required Tiller to report the numbers and source of trucks hauling Class C add-rock from the Zavoral Mine site and other sites to the Scandia Mine site to ensure that additional truck traffic did not result from the Zavoral Site operations. Aggregate mining is no longer occurring at the Zavoral site. Tiller reports that no class C add-rock was imported to the site during 2017. Approximately 25,000 tons of Class C add-rock are expected to be imported to the site during 2018. 2018 Activity. The 2018 application anticipates that mining and processing will continue at the site in 2018. The level of activity will depend on market demand for the site products. The Site Plan identifies the Potential Mining Areas for 2018, which are on the west, south and east sides of the Stockpile and Processing Area, and within the approved mining limits. Scandia City Council Tiller Scandia Mine 2018 AOP Page 8 February 20, 2018 Ground Water Monitoring Plan and Monitoring Issues The approved Groundwater Monitoring Plan for the site is on file at the City. The City’s groundwater consultant, Legette, Brashears, and Graham, Inc. (LBG) reviews the ground water monitoring results each year for the AOP and provides comments to the City. LBG Analysis Based on 2016 Monitoring Data LBG reviewed the data and analytical reports from the monitoring wells on the Tiller site that were submitted with the application. LBG’s comments noted the following:  2017 groundwater monitoring was completed in accordance with the approved monitoring plan.  Diesel Range Organics (DRO) were not detected above the method detection limit in any of the wells for samples collected. These results and the other groundwater chemistry results indicate no groundwater quality concerns.  Groundwater flow direction across the site is generally to the north and consistent with previous submittals.  Groundwater levels in the monitoring wells across the site rose 2-3 feet from November 2016 to November 2017. The increase is the result of local and regional water table fluctuations associated with greater precipitation compared to previous years. LGB Recommendations LBG included the following recommendations in their report. The Planner has included the recommendations in the proposed conditions for the 2018 AOP for the Scandia mine:  It is recommended that Tiller pay close attention to the groundwater levels across the site in 2018 to ensure the minimum excavation elevation of 922 ft amsl (included in the CUP for the Dresel site) will not extend below the water table in the event groundwater levels continue to rise. Tiller also provided groundwater elevations data for the site from September, 2008 to October 2017 as part of their annual report. The data show that groundwater levels in each of the sampling locations were higher in 2017 than in 2008. Setbacks The AOP application indicates that the minimum setbacks are maintained as follows:  50 feet from the adjoining property line  200 feet from an existing occupied structure  100 feet from residential property boundaries of 5 acres or less  100 feet from any road right-of-way The setbacks meet the requirements of Ordinance No. 103. City inspection during 2017 indicated that the setbacks were maintained and meet City requirements. Scandia City Council Tiller Scandia Mine 2018 AOP Page 9 February 20, 2018 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 November, 2017, and verified that it meets the requirements of the Ordinance and CUP. Hours of Operation The site is operated from 7 a.m. to 7 p.m. 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 Ordinance No. 103. The City approved extended hours on August 13 and 15, 2017 to operate the asphalt plant to prepare mix for County projects that had been delayed due to wet weather and to allow truck traffic until 8 p.m. for the CSAH 26 project. The City authorized extended hours on Saturday, September 30 for the operation of the asphalt plant and hauling between the hours of 7:00 a.m. and 2 p.m. to complete the County Road 4 project in Marine. The city received no complaints about the activity conducted during the extended hours. Screening and Berms The mine is screened from surrounding areas by berms, wooded areas, and agricultural fields. The operator has planted large numbers of trees over the years of mine operation to augment the screening. Processing and stockpiling operations are conducted in recessed portions of the site to minimize visibility. The City received no complaints about screening in 2017. 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 provide dust generated by trucking activity. The applicant indicated that these actions were implemented in 2017 and will be continued as needed in 2018. The CUP does not require additional dust control efforts. The City did not receive complaints about dust control at the site in 2017. Noise The Applicant must comply with all Federal, State, and City noise standards. The City received no noise complaints related to the Scandia Mine in 2017. 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 (msl) on the former Dresel Mine site. The depth of excavation at the Scandia mine has been limited to a depth of 15-20 feet within the groundwater table in the past and will continue to be limited to this depth in 2018, which complies with the limits permitted in the CUP. Site Clearance Site clearing did not occur in 2017, but may occur within the areas identified on the site plan for Potential Mining Activity in 2018. The areas are within the permitted mining limits. Scandia City Council Tiller Scandia Mine 2018 AOP Page 10 February 20, 2018 Appearance/Condition The City’s site inspection in 2017 confirmed that the site and facilities are maintained in a neat condition. Sanitary Facilities The application indicates that 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 2017. 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 2017 confirmed that the Applicant is meeting the requirements of the CUP. Contaminated Soils Incident In May, 2017, mining excavations on the Dresel site exposed some contaminated soils. The soils were impacted by petroleum, and were noticeably stained and had a faint diesel fuel odor. Tiller reported the incident to the State Duty Officer as required, and hired Wenck Associates to complete an investigation and remedial activities to address the issue. The State Duty Officer also contacted the Washington County Department of Health about the incident. Wenck completed a technical memo summarizing the results of the investigation and remediation, dated December 19, 2017. The area of contaminated soils was identified, excavated, and properly disposed. After the final day of excavation on November 13, 2017, none of the analyzed parameters were detected above their applicable laboratory reporting limits at the site, indicating that the remedial excavation activities were successful in removing the petroleum impacts. Approximately 150 tons of petroleum-impacted soils were properly disposed. The County Health Department and Wenck stated that no further action is recommended. Water Quality Monitoring Plan The CUP required that Tiller Corporation complete a plan for groundwater monitoring within 60 days of approval of the CUP (July 20, 2008). The approved ground water monitoring plan was completed and is on file at the City. Tiller submitted monitoring results for 2017 with its application for the 2018 AOP. LBG reviewed the ground water monitoring activities and reports, and indicated that the applicant is completing the required monitoring in compliance with the CUP. LBG did not recommend a change in conditions for the 2017 AOP. Fuel and Chemical Storage The application describes fuel and chemical storage at the site. The applicant notes that these materials are stored in accord with Federal and State standards and County requirements. On- site fuel storage consists of a 1,000-gallon above-ground storage tank which is located within a concrete secondary containment area and a 200-gallon above-ground double-walled tank located next to the standby electrical generator. When production or reclamation crews are Scandia City Council Tiller Scandia Mine 2018 AOP Page 11 February 20, 2018 present, an additional 1,000-gallon double-walled tank is brought to the site and used to fuel the equipment for those operations. All asphalt-cement storage tanks are above-ground. This includes two 40,000 gallon tanks and two 32,000-gallon tanks. There is also a 20,000 gallon above-ground used oil storage tank at the site. The used oil is an alternative fuel supply for the asphalt plant. All tanks containing asphalt cement and used oil are located within a concrete secondary containment area. The storage tanks are registered with the MPCA. Storage meets the requirements of the CUP and agency standards. City staff reviewed the facilities with Tiller staff at the 2017 site visit. 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. Processing and Recycling 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 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 2017 verified that the processing facilities meet the setback requirements of the CUP, and no violations of permits were reported in 2017. Recycling at the site is permitted by Ordinance 103. In 2017, the site processed 23,500 tons of recycled concrete and approximately 30,000 tons of recycled asphalt pavement. Asphalt production used approximately 31,000 tons of recycled asphalt pavement in 2017. The recycled concrete and asphalt are sold in a variety of aggregate products. Tiller maintains 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 approved by Washington County. The County reviews the license on an annual basis and may inspect the property annually. Trucking Operations The application indicates that truck operations have access to County Road 15 (Manning Avenue) and County Road 1 (Lofton Avenue), which are paved roads. The City received two complaints about trucking activities in early 2018: 1. A complaint about trucks travelling north on Lofton Avenue shortly after 6:30 a.m. Comment: The CUP prohibits hauling before daylight, but does not prohibit empty trucks from travelling to the mine site prior to the 7 a.m. permitted start of operations. The City Administrator called Tiller about the complaint to determine if the activity included hauling. Mike Caron checked with his drivers and stated that none of them were hauling in before 7. The drivers noted that Shaw Trucking was hauling on Lofton that week but they were not sure of the destination. 2. The City received a complaint that Tiller is hauling sand, gravel, and other materials into the Scandia Mine site from other sites. Comment: The CUP permits Tiller to haul sand, gravel, aggregates, and materials to be recycled to the site. Tiller maintains appropriate County permits for Solid Waste Storage and Recycling with Washington County. Scandia City Council Tiller Scandia Mine 2018 AOP Page 12 February 20, 2018 The Planner’s proposed conditions for the trucking activities at Scandia Mine 2018 AOP are the same as those included in previous AOP’s and require that Tiller inform all contractors about the following requirements related to trucking operations, and monitor compliance with the requirements by all of its contractors:  Engine braking is prohibited in Scandia  Lofton Avenue is restricted to daytime use only  Loads are required to be covered 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 2017. Reclamation Plan The applicant submitted a Reclamation Plan with the AOP application that combines the Tiller and Dresel site reclamation plans. 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 at least four inches;  The topsoil shall be planted with trees, shrubs, legumes or grasses  Slopes shall not be steeper than 4:1 Section 8.2 of Ordinance 103 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 at 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 an un-reclaimed state, encouraging erosion, dust and weed establishment  The mining operation is making an ongoing investment in reclamation, to avoid potential problems that may occur at the end of the mining operation if a large investment is needed in reclamation, and the applicant’s resources are limited at that point, or the applicant abandons the site. Reclamation activities in 2017 included placement of overburden and suitable fill material in the area just west of the screening berm that runs north-south on the east side of the site access from 218th Street. Placement of overburden also occurred on portions of the slope along the west perimeter of the mining area, near the common mining border with the Dresel Mine. The locations of completed and ongoing reclamation activities are shown on the Site Plan. Tiller anticipates completing additional reclamation activities within the Dresel Site in 2018. The areas are shown on the Site Plan. The reclamation completed meets the requirement of the CUP. Scandia City Council Tiller Scandia Mine 2018 AOP Page 13 February 20, 2018 Watershed District Comments The Carnelian-Marine-St. Croix Watershed District reviewed the 2018 AOP application and Jim Shaver, the District Administrator, provided the following comments: “Tiller is required to renew their permit for an additional 5 year term in 2018 supplying the District with the following:  Updated restoration plan  Updated operational plans  Copies of Annual Operator Reviews from the City of Scandia  Permit renewal fee and surety adjustments as required  Additional Information as may be required to review anticipated future operations The Planner included the requirement to renew the CMSCWD permit in the proposed conditions of approval for the 2018 AOP. SITE INSPECTION City staff completed a site visit to the Tiller Corporation Scandia Mining Operation on November 13, 2017, including documenting conditions on the site. The site visit reviewed 2017 activities and site conditions based on the CUP and 2017 AOP, and discussed expected activity in 2018. ACTION REQUESTED: The City Council can: 1. Approve the AOP; 2. Approve the AOP with conditions; 3. Deny the application if it is found that the request is not consistent with the Comprehensive Plan, CUP, AOP Criteria, and Mining Ordinance, and is not in the best interest of the community; 4. Table the request if the Council needs additional information to make its decision. PLANNING STAFF RECOMMENDATIONS: The Planner recommends approval of the Tiller Corporation 2018 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 pay close attention to the groundwater levels across the site in 2018 to ensure that the minimum excavation elevation of 922 ft. amsl will not extend below the water table in the event groundwater levels continue to rise. Scandia City Council Tiller Scandia Mine 2018 AOP Page 14 February 20, 2018 3. 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. 4. The applicant shall renew Watershed District permit number P08-003 for the Scandia Mine as required by the CMSCWD and provide a copy of the approved permit to the City. 5. The applicant shall submit a lake monitoring plan to the CMSCWD for approval with the renewal of District permit number P08-003. 6. The applicant shall continue to provide the production well records for the site to the City so the pumping records can be compared to past and future groundwater level trends at the site. The applicant should measure the water level in the production well under non- pumping conditions during monitoring periods. 7. Requests for operating hours or haul routes outside those specified in the Conditional Use Permit shall be accompanied by a proposed truck haul route for approval by staff. 8. The applicant shall inform all of its contractors about the following requirements related to trucking operations, and monitor compliance with the requirements by all of its contractors:  Engine braking is prohibited in Scandia  Lofton Avenue is restricted to daytime use only  Haul loads are required to be covered 9. The applicant shall regularly monitor the entrances and exits to the site, and work with their hauling contractors and truck drivers to maintain compliance with traffic laws. 10. The Reclamation activities shall meet the requirements of the Conditional Use Permit, including soil and planting requirements. 11. If the applicant has knowledge that a crash or traffic violation occurs involving a truck hauling for Tiller, Tiller shall contact the City to report the incident immediately. The applicant shall report actions it will take to respond to the incident. 12. The applicant shall pay all fees and escrows associated with this application. 13. This Annual Operating Permit shall expire on March 31, 2019. ACTION REQUESTED: Staff request that the Council review this report and approve the AOP at the meeting on February 20, 2018. Tiller Corporation and its operating divisions Barton Sand & Gravel Co. Commercial Asphalt Co. Barton Enterprises, Inc. General: (763) 425-4191 Facsimile: (763) 425-7153 Web: www.tillercorp.com Corporate Office: P.O. Box 1480 7200 Hemlock Lane, Suite 200 Maple Grove, Minnesota 55311-6840 January 31, 2018 Neil Soltis City of Scandia 14727 209th St. N Scandia MN, 55073 Re: 2018 Annual Operators Permit-Scandia Dear Mr. Soltis: Enclosed please find an Application for Planning and Zoning Request, a narrative for Tiller Corporation’s 2018 Application for the Annual Operators Permit and a check for $5,500 covering the $500 application fee and $5,000 escrow. Please let me know how many additional copies of the narrative the City will require so we can deliver those to you. Also attached to this letter is a technical memo from Wenck Associates summarizing investigation and remedial activities for petroleum contaminated soils. These soils were discovered by our operators during mining activities in an area of the Dresel Mine that had not been active for a number of years. Contact me if you have questions. I may be reached at (763) 425-4191. Sincerely, Tiller Corporation Michael Caron Director of Land Use Affairs enc: 11/19/2010 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) ____ 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 Several 11/19/2010 7. Brief Description of Request: (attach separate sheet 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: _______________________ 1//201 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 2018 APPLICATION FOR 2018 ANNUAL OPERATORS PERMIT Scandia, MN Consulting Civil Engineers Tiller Corporation Page 1 2018 Annual Operators Permit Application January 30, 2018 APPLICATION FOR ANNUAL OPERATORS PERMIT TILLER CORPORATION SAND AND GRAVEL MINING OPERATION CITY OF SCANDIA WASHINGTON COUNTY, MINNESOTA January 2018 I. INTRODUCTION The following Annual Operators Permit (AOP) application is submitted on behalf of Tiller Corporation (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. Tiller and its operating divisions, Barton Sand & Gravel Co. and Commercial Asphalt Co. 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. 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 Tiller Corporation Page 2 2018 Annual Operators Permit Application January 30, 2018 with procedures set forth in Ordinance No. 103, extended hours were requested and approved in 2017. 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. Extended hours were approved for the operation of the asphalt plant on Sunday August 13th to operate the asphalt plant from 3:00 P.M. until 6:00 P.M. in order to prepare mix for the next day. There were several County projects that had been delayed the previous week because of wet weather and an effort was made to get these projects back on schedule by having mix available right away for 7:00 A.M Monday morning. Extended hours were requested and approved for August 15th, 18th and 29th to allow truck traffic until 8:00 P.M. This was done in order to accommodate scheduling for the CSAH 26 project. Finally, extended hours were approved for Saturday September 30th for the operation of the asphalt plant and hauling between the hours of 7:00 A.M. and 2:00 P.M. complete the CR 4 project in Marine. The project was completed by noon on that day. 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 2018. 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 (amsl) for the property described in Resolution No. 05-20-08-02, Approving the Conditional Use Permit Application of Dresel Contracting for Sand and Gravel Mining Processing. On the balance of the property the depth of excavation below the water table will not extend deeper than 865.87 feet amsl, 8. Site clearance: Site clearing activities did not occur during 2017. If clearing activity occurs, it will occur within the 2018 Potential Mining Areas as depicted on the 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 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. Tiller Corporation Page 3 2018 Annual Operators Permit Application January 30, 2018 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 has been developed and approved in conjunction with the monitoring wells placed in 2008 and the CUP permitting process. Groundwater monitoring was conducted in 2017. Water level data is summarized on Table 1 and water quality data is summarized on Table 2. 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. 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. Approximately 23,500 tons of recycled concrete and approximately 30,000 tons of recycled asphalt pavement (RAP) was processed in 2017. Asphalt production used approximately 31,000 tons of RAP in 2017. Processed RAP is used in asphalt production and recycled concrete is sold in various aggregate products. Tiller Corporation Page 4 2018 Annual Operators Permit Application January 30, 2018 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. 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: A Watershed District Permit is in the process of being reviewed. Once the review is complete, information pertaining to the permit will be submitted to the City. 3. Monitoring Wells: All required monitoring wells have been installed. 4. Groundwater Monitoring Plan: A monitoring plan with protocols is on file with the City. 5. Excavation Below Water Table: In 2017, excavation into the groundwater table did not occur. Excavation into the groundwater table is likely to occur in 2018 based on availability of equipment. 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 were analyzed for DRO as indicated in the groundwater monitoring plan (see Table 2). 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. Tiller Corporation Page 5 2018 Annual Operators Permit Application January 30, 2018 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 previous depth of exaction has been measured at approximately 904 feet amsl which is well above the minimum excavation elevation of 865.87 established in previous AOP’s. 11. Truck Hauling Signs: Washington County has posted Lofton and Manning Avenues per their requirements. Tiller has posted signs on 218th Street per City of Scandia requirements. 12. Lofton/Hwy 97 Intersection: Tiller Corporation restricts importing add-rock from Lofton Ave. N. during non-daylight hours as defined in our CUP. 13. 228th Street Sign: Tiller Corporation has posted a sign at the Lofton Ave. N. exit that restricts trucks from using 228th Street. 14. Reclamation and Sequencing Plan: An updated reclamation plan is being submitted as part of the AOP Application. The updated reclamation plan reflects as-built grades in recently reclaimed areas. These grades are higher than what was originally planned. Current reclamation progress and sequencing are indicated on the Site Plan submitted with the AOP application. C. Annual Activity 1. Amount of material removed from the site: Approximately 415,000 tons of material was removed in 2017. 2. Amount of add-rock brought onto the site: No Class C add-rock was imported during 2017. Approximately 61,000 tons of Class A, Class B and Class D add-rock were imported to the site in 2017. 3. Amount of recycled asphalt brought to the site: Approximately 30,000 tons of asphalt for recycling was imported to the site in 2017. 4. Amount of recycled concrete brought to the site: Approximately 18,000 tons of concrete for recycling was imported to the site in 2017. 5. Area reclaimed and type of reclamation: Reclamation activities in 2017 included placement of overburden and suitable fill material to the area just west of the screening berm that runs north-south on the east side of the site access from 218th Street. In addition, placement of overburden occurred on portions of the slope along the west perimeter of the mining area, near the common mining border with the Dresel Mine. The completed and ongoing reclamation areas are indicated on the Site Plan. Tiller Corporation Page 6 2018 Annual Operators Permit Application January 30, 2018 Ongoing reclamation activities are anticipated in the southern portion of the Site along the west perimeter near the common mining border during 2018. These areas are shown on the Site Plan as 2018 Potential Reclamation Activity. Some of the areas shown as potential reclamation will also see active mining during 2018. Once mining is complete, reclamation may advance into these areas during 2018. 6. 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 2017 was approximately 195 trucks per day. 7. As indicated above, no Class C add rock was imported during 2017. Approximately 25,000 tons of Class C add rock is expected to be imported during 2018. D. Description of operating conditions planned for the coming year: During the 2018 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 2018 production schedule anticipates mining and processing during the 2018 mining season. The exact area of excavation will depend on the required gradation of the end products. Mining anticipated during 2018 will occur within the 2018 Potential Mining Area and some of the Potential Reclamation Areas as indicated on the Site Plan. Site Plan: A Site Plan is attached which illustrates the potential active mining area in 2018, potential reclamation activity in 2018, the stockpile and processing area, reclaimed areas and the current limits of excavation into groundwater. Aerial Photo: A 2016 aerial photo is attached that identifies the Mining Limit, the Tiller Mine property boundary and the Dresel Mine property boundary. Reclamation: Ongoing reclamation activities are anticipated in the southern portion of the Site. and the area along the west perimeter near the common mining border during 2018. These areas are shown on the Site Plan as 2018 Potential Reclamation Activity. Operating Conditions for 2018: The 2018 production schedule anticipates mining and processing during 2018. Mining will occur within the 2018 Potential Mining Area as indicated on the 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 13, 2017. Tiller Corporation Page 7 2018 Annual Operators Permit Application January 30, 2018 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 30, 2018 Reg. No. 21842                                                   Tables                Table 1: Scandia Groundwater Elevation Data Table 1: Continued Scandia Groundwater Elevation Data  Table 3: Production Well Records Scandia Mine    Pumping Records: 2017 Operating Season  Production Well   Month  Amount Pumped (Gal)  January 0 February  0 March 0 April  0 May                                        93,800   June                                      140,000   July                                      104,000   August                                        80,000   September                                      102,000   October                                 12,720,200   November 0 December  0   Total Pumped in 2017:                                  13,240,000   MINING LIMITS MINING LIMITS MINING LIMITS DRESEL MINE TILLER MINE COMMON MINING BORDER Engineering, PLLC. Sunde Figure 1 Aerial Photo Annual Operating Permit Aerial image from Google Earth dated 03-11-2016. 100' 50.00 PEMBgPEMBPEMBPEMBPEMCPSS1BPEMBPUBGPEMBPEMCPEMBPEMBPEMBPSS1BPEMCPEMCxPEMBPEMCPEMCPUBGPUBGPFO1CPEMCPSS1/3BPEM/SS1BPEMCPEMAPEMCPEMCPEMCPEMBPEMB SS1PSS1BPEMCPEMCPSS1BPEMCPEMCPUBG218TH ST. N.PSSIBPEMFPEMCPEMCMW-1PZ-5PZ-4SCALE HOUSEWELLMW-6PZ-3PRODUCTIONWELLSTOCKPILE ANDPROCESSINGAREA(Future Mining)RECLAIMEDAREARECLAIMEDAREARECLAIMEDAREAMININGLIMITSSCREENING BERMLOCKINGGATEMININGLIMITSMININGLIMITSRECLAIMEDAREAHAUL RD. TOLOFTON AVE.DRESEL MINETILLER MINECOMMON MINING BORDERCURRENTLIMITS OFEXCAVATIONINTOGROUNDWATER2018POTENTIALMINING AREA2018POTENTIALMINING AREAHAULROADLOCKINGGATELOCKINGGATE SCREENING BERMMaintain 50'Wetland Setback2018 POTENTIALRECLAMATIONAREAMaintain 50'Wetland SetbackSHEET 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 1C1218421/16/2018Update for 2018 AOP1/16/18Update for 2017 AOP12/28/16Update for 2016 AOP1/13/16Update for 2015 AOP1/14/151/24/14 Update for AOP2013 Update for AOP1/28/13Add Dresel property line1/23/12Add MW-61/19/12Well Labels3/3/11SITE PLANTILLERCORPORATIONSCANDIA,MINNESOTA····2018ANNUALOPERATORS PERMIT W.E.933.3CONVEYER22044Z 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 = 674.38 963.2955.5958.5956.9964.4962.4969.7962.4958.2962.9961.3970950970960940972.8960.2973.8968.9966.3959.2951.3945.2942.6945.6962.4945.2940.8940.2944.2950.7954.4957.6958.3957.6953.7948.8962.3956.1961.9972.7994.9969.4969.6965.5981.3974.5930.4939.9956.8968.6974.4959.0928.2958.2962.9986.79509609509509 6 0 94096095095096096095 0 9609609509609409409509609609609 4 0 95095095096095094095094095096097099098010009709709709909 9 0 1 0 0 0 970970 97098099098098097010 10 98 0 97098099050' SETBACKGATELOFTON ROAD970980960950940920930950960990 980 970 960 950 940 930 920 940930920950960970980990960960950920 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 PROPOSED FUTURE LAKE CONFIGURATIONWATER ELEVATION AT 916+/-BOTTTOM OF LAKE AT 870-89093094095096097098099010009329349369389229249269289309409509604.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\2018 Reclamation\updated reclamation plan with drone grades on dresel.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 7C3218421/16/2018Update Dresel Reclamation Grades1/16/20182010 AOP Add Dresel Site2/4/10Revise Mining Limits Near Wetland 812/10/08Update per CUP8/13/08Watershed District Comments6/3/08City Comments4/21/08 GL7,8 2032 93-253MINING ANDRECLAMATIONPLANTILLERCORPORATIONSCANDIA MININGOPERATION600300300