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9.a iii) 2019-01-28 APPLICATION FOR ANNUAL OPERATORS PERMIT-TILLERSunde Engineering, PLLC. 10830 Nesbitt Avenue South • Bloomington, Minnesota 55437-3100 Phone: (952) 881-3344 • Fax: (952) 881-1913 • E-Mail: info@sundecivil.com January 2019 2019 APPLICATION FOR THE ANNUAL OPERATORS PERMIT Scandia, MN Consulting Civil Engineers Tiller Corporation Page 1 2019 Annual Operators Permit Application January 28, 2019 APPLICATION FOR ANNUAL OPERATORS PERMIT TILLER CORPORATION SAND AND GRAVEL MINING OPERATION CITY OF SCANDIA WASHINGTON COUNTY, MINNESOTA January 2019 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 2019 Annual Operators Permit Application January 28, 2019 with procedures set forth in Ordinance No. 103, extended hours were requested and approved in 2018. 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 and utilized to accommodate area projects on fourteen separate occasions in 2018. There were a variety of reasons for the requested extended hours. Rain delays and keeping local road projects on schedule were the primary reasons for the requests.The majority of the extended hours requests were to accommodate the road improvement projects in the City of Scandia and were requested intermittently between the end of May through mid-September. The requests included four early starts at either 5 AM or 5:30 AM for the asphalt plant, one request for extended evening hours until 9:00 PM and two requests to operate on Saturdays, generally between 7 AM and 4 PM. An additional five extended hours requests were authorized to operate on Saturdays, generally between 7 AM and 4 PM and one request to operate until 9:00 PM to keep a number of CSAH projects located in Chisago County on-schedule, as well city street projects located in Wyoming, Dellwood and Lake Elmo and the I-35 project in Forest Lake. Lastly, there was one incident on June 29th when the power went out for a large portion of Scandia, which affected the ability for the asphalt plant to shut -down properly. A request for extended hours to operate the generator until 8:30 PM was authorized in order to properly shut-down the asphalt plant. 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 2019. 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 be lower than 865.87 feet amsl. 8. Site clearance: Site clearing activities did not occur during 2018. If clearing activity occurs, it will occur within the 2019 Potential Mining Areas as depicted on Figure 2, Site Plan. Tiller Corporation Page 3 2019 Annual Operators Permit Application January 28, 2019 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. 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 2018. 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. 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 Tiller Corporation Page 4 2019 Annual Operators Permit Application January 28, 2019 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 9,000 tons of recycled concrete and approximately 10,000 tons of recycled asphalt pavement (RAP) was processed in 2018. Asphalt production used approximately 50,000 tons of RAP in 2018. Processed RAP is used in asphalt production and recycled concrete is sold in various aggregate products. A Solid Waste Storage Facility license that authorizes the storage of unprocessed concrete, concrete products and brick and a Recycling Facility license that authorizes the storage and processing of recycled asphalt products are issued to Tiller by Washington County. General and Specific Conditions are established for each license and are reviewed on an annual basis and may include an annual inspection completed by the County. 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 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 2018, excavation into the groundwater table did not occur. Excavation into the groundwater table is likely to occur in 2019 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. Tiller Corporation Page 5 2019 Annual Operators Permit Application January 28, 2019 7. Groundwater Analysis: Groundwater samples were analyzed for DRO as indicated in the groundwater monitoring plan. Table 2 summarizes the results of the required groundwater monitoring. 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 previous depth of excavation has been measured at approximately 904 feet amsl which is well above the maximum 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 their 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: A Reclamation Plan and Phasing Plan is on-file with the City. Current reclamation progress is indicated on Figure 2, Site Plan, submitted with this AOP application. C. Annual Activity 1. Amount of material removed from the site: Approximately 445,000 tons of material was removed in 2018. 2. Amount of add-rock brought onto the site: Approximately 110,520 tons of Class A, Class B, Class C and Class D add-rock were imported to the site in 2018. 3. Amount of recycled asphalt brought to the site: Approximately 38,000 tons of asphalt for recycling was imported to the site in 2018. 4. Amount of recycled concrete brought to the site: Approximately 12,000 tons of concrete for recycling was imported to the site in 2018. Tiller Corporation Page 6 2019 Annual Operators Permit Application January 28, 2019 5. Area reclaimed and type of reclamation: Reclamation activities in 2018 included placement of overburden and suitable fill material on portions of the slope along the west perimeter of the mining area, south of the Scandia Mine/Dresel Mine common mining border. The completed and ongoing reclamation areas are indicated on Figure 2, Site Plan. Ongoing reclamation activities are anticipated in the southern portion of the Site along the west perimeter near the common mining border during 2019. These areas are shown on Figure 2, Site Plan as 2019 Potential Reclamation Activity. Some of the areas shown as potential reclamation will also see active mining during 2019. Once mining is complete, reclamation may advance into these areas during 2019. 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 2018 was approximately 242 trucks per day. D. Description of operating conditions planned for the coming year: During the 2019 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 2019 production schedule anticipates mining and processing during the 2019 mining season. The exact area of excavation will depend on the required gradation of the end products. Mining anticipated during 2019 will occur within the 2019 Potential Mining Area and some of the Potential Reclamation Areas as indicated on Figure 2, Site Plan. Aerial Photo: Figure 1, Aerial Photo, a 2017 aerial photo is attached that 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 potential active mining area in 2019, potential reclamation activity in 2019, the stockpile and processing area, reclaimed areas and the current limits of excavation into groundwater. 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 2019. These areas are shown on Figure 2, Site Plan as 2019 Potential Reclamation Activity. Operating Conditions for 2019: The 2019 production schedule anticipates mining and processing during 2019. Mining will occur within the 2019 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. Tiller Corporation Page 7 2019 Annual Operators Permit Application January 28, 2019 E. Inspection: The City conducts an annual inspection of the site. The last inspection occurred on October 9, 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 28, 2019 Reg. No. 21842         Tiller Corporation Page 8 2019 Annual Operators Permit Application January 28, 2019 Table 1: Scandia Groundwater Elevation Data Tiller Corporation Page 9 2019 Annual Operators Permit Application January 28, 2019 Table 1: Scandia Groundwater Elevation Data Tiller Corporation Page 10 2019 Annual Operators Permit Application January 28, 2019 Table 2: Water Quality Monitoring Results Tiller Corporation Page 11 2019 Annual Operators Permit Application January 28, 2019 Table 2: Water Quality Monitoring Results Tiller Corporation Page 12 2019 Annual Operators Permit Application January 28, 2019 Table 3: Production Well Records Scandia Mine Pumping Records: 2018 Operating Season Production Well Month Amount Pumped (Gal) January 0 February 0 March 0 April 11,750 May 6,412,575 June 6,528,050 July 212,700 August 121,300 September 52,000 October 44,004 November 4,000 December 0 13,386,379 Total Pumped in 2018: Water Appropriation Permit authorizes withdrawal of up to 20 million gallons per year. 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 Washington County 2017 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 OFEXCAVATIONINTOGROUNDWATER2019POTENTIALMINING AREA2019POTENTIALMINING AREAHAULROADLOCKINGGATELOCKINGGATE SCREENING BERMMaintain 50'Wetland Setback2019 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 1Figure 2218421/15/2019Update for 2019 AOP1/15/19Update 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····2019ANNUALOPERATORS PERMIT