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LEGEND 950 EXISTING CONTOURS CONCRETE WASHOUT STATION 950 PROPOSED CONTOURS - MAJOR INTERVAL 949 PROPOSED CONTOURS - MINOR INTERVAL SEDIMENT LOG GRADE BREAK LINE SPOT ABBREVIATIONS: 2.0% GRADE SLOPE 950.00 TC TC - TOP OF CURB 949.50 GL SILT FENCE GL - GUTTER LINE B - BITUMUNOUS RIP-RAP / ROCK CONST. ENTRANCE C - CONCRETE EO - EMERGENCY OVERFLOW TW - TOP OF WALL (F/G) INLET PROTECTION BW - BOTTOM OF WALL (F/G) 934.5 TC* G - FINISHED GRADE 934.0 GL* RETAINING WALL IS FREE STANDING FF - FINISHED FIRST FLOOR ABOVE FINISHED GRADE. SEE (*) - EXISTING TO BE VERIFIED ARCHITECTURAL PLANS SHEET A3.2 FOR HEIGHT OF WALL ABOVE GRADE. EROSION CONTROL NOTES 1.Owner and Contractor shall obtain MPCA-NPDES permit. Contractor shall be responsible for all fees pertaining to this permit. The SWPPP shall be kept onsite at all times. 2.Install temporary erosion control measures (inlet protection, silt fence, and rock construction entrances) prior to beginning any excavation or demolition work at the site. 941.5 C 3.Erosion control measures shown on the erosion control plan are the absolute minimum. The contractor shall install temporary earth dikes, 941.4 C sediment traps or basins, additional siltation fencing, and/or disk the soil parallel to the contours as deemed necessary to further control erosion. 933.50 TC All changes shall be recorded in the SWPPP. 933.00 GL 939.5 TW 935.2 C 4.All construction site entrances shall be surfaced with crushed rock across the entire width of the entrance and from the entrance to a point 50' 935.5 BW 934.8 GL 935.4 TC into the construction zone. 940.9 F 934.9 GL 934.8 TC 934.3 GL 934.85 R 5. 940.8 C 935.90 TW 934.85 R935.93 TC 935.8 G 935.93 TC 934.85 R 934.85 R 935.93 TC 935.93 TC 935.90 BW 935.43 GL 935.43 GL 935.43 GL 935.49 TC935.43 GL TRASH 6.All grading operations shall be conducted in a manner to minimize the potential for site erosion. Sediment control practices must be established 934.99 GL ENCLOSURE on all down gradient perimeters before any up gradient land disturbing activities begin. 934.45 TC 935.3 GL F.F.E.=935.8 932.80 B* 935.90 TC 933.95 GL 935.40 GL 7.All exposed soil areas must be stabilized as soon as possible to limit soil erosion but in no case later than 14 days after the construction activity 940.0 TW 935.8 FF/C 935.9 C 933.20 TC 935.8 BW 936.0 TC in that portion of the site has temporarily or permanently ceased. Temporary stockpiles without significant silt, clay or organic components (e.g., 936.0 C 932.70 GL 936.0 C 935.8 TC 935.5 GL 936.0 C clean aggregate stockpiles, demolition concrete stockpiles, sand stockpiles) and the constructed base components of roads, parking lots and 934.07 TC 935.3 GL 935.8 TC 933.57 GL similar surfaces are exempt from this requirement. 939.9 TW 935.8 G 935.3 GL 935.8 BW 936.0 FF 936.0 G 8.The normal wetted perimeter of any temporary or permanent drainage ditch or swale that drains water from any portion of the construction site, 935.86 TC or diverts water around the site, must be stabilized within 200 lineal feet from the property edge, or from the point of discharge into any surface 935.36 GL 934.23 TC water. Stabilization of the last 200 lineal feet must be completed within 24 hours after connecting to a surface water. Stabilization of the 933.73 GL 935.74 TC remaining portions of any temporary or permanent ditches or swales must be complete within 14 days after connecting to a surface water and 935.08 C 935.24 GL construction in that portion of the ditch has temporarily or permanently ceased. 935.83 C 9.Pipe outlets must be provided with energy dissipation within 24 hours of connection to surface. 935.59 TC 934.8 R 935.75 TC 935.09 GL 932.81 TC 935.25 GL 935.8 TC 10.All riprap shall be installed with a filter material or soil separation fabric and comply with the Minnesota Department of Transportation Standard 932.31 GL 935.3 GL Specifications. 932.41 B* 934.07 TC 936.0 C 938.8 TW 11.All storm sewers discharging into wetlands or water bodies shall outlet at or below the normal water level of the respective wetland or water body 933.57 GL 936.0 BW at an elevation where the downstream slope is 1 percent or flatter. The normal water level shall be the invert elevation of the outlet of the 936.0 FF 936.0 C 936.0 TC wetland or water body. 936.0 FF 935.5 GL 936.0 FF 936.0 C 936.0 FF 936.0 FF 12.All storm sewer catch basins not needed for site drainage during construction shall be covered to prevent runoff from entering the storm sewer 936.58 TW system. Catch basins necessary for site drainage during construction shall be provided with inlet protection. 936.58 BW 935.68 TC 935.80 C935.80 TC 935.80 TC 935.80 TC935.18 GL 13.In areas where concentrated flows occur (such as swales and areas in front of storm catch basins and intakes) the erosion control facilities shall 935.80 TC 935.30 GL 935.30 GL 935.30 GL be backed by stabilization structure to protect those facilities from the concentrated flows. 935.30 GL 936.23 TC 932.00 R 933.50 TC 935.73 GL 933.00 GL 935.80 TC 14.Inspect the construction site once every seven days during active construction and within 24 hours after a rainfall event greater than 0.5 inches in 935.30 GL 935.30 GL 24 hours. All inspections shall be recorded in the SWPPP. 935.70 TC 935.5 C 15.All silt fences must be repaired, replaced, or supplemented when they become nonfunctional or the sediment reaches 1/3 of the height of the 935.20 GL fence. These repairs must be made within 24 hours of discovery, or as soon as field conditions allow access. All repairs shall be recorded in the 932.70 TC 935.0 GL SWPPP. 932.20 GL 935.49 TC 934.99 B 934.99 B 934.99 GL 934.75 B 933.98 R 16.If sediment escapes the construction site, off-site accumulations of sediment must be removed in a manner and at a frequency sufficient to 932.40 B minimize off-site impacts. 934.78 B/EO 934.66 R 934.5 GL/EO 934.78 B 17.All soils tracked onto pavement shall be removed daily. 932.70 TC 18.All infiltration areas must be inspected to ensure that no sediment from ongoing construction activity is reaching the infiltration area and these 935.35 TC 932.20 GL areas are protected from compaction due to construction equipment driving across the infiltration area. 934.85 GL 935.4 TC 934.22 TC 934.98 R 935.0 R 935.88 TC 934.9 GL 933.72 GL 932.00 R 935.10 R 935.88 TC 19.Temporary soil stockpiles must have silt fence or other effective sediment controls, and cannot be placed in surface waters, including stormwater 935.38 GL 935.38 GL 936.75 C conveyances such as curb and gutter systems, or conduits and ditches unless there is a bypass in place for the stormwater. 935.15 R 931.75 C 932.25 C 935.9 C 20.Collected sediment, asphalt and concrete millings, floating debris, paper, plastic, fabric, construction and demolition debris and other wastes 935.4 C 936.53 C must be disposed of properly and must comply with MPCA disposal requirements. 2% 937.0 G 936.53 C 932.00 TC 21.Oil, gasoline, paint and any hazardous substances must be properly stored, including secondary containment, to prevent spills, leaks or other SWALE 931.50 GL discharge. Restricted access to storage areas must be provided to prevent vandalism. Storage and disposal of hazardous waste must be in I hereby certify that this plan, 936.03 GLcompliance with MPCA regulations. 935.40 B specifications or report was prepared 935.3 G* 936.55 TC by me or under my direct supervision 932.5 C* 936.05 GL 22.External washing of trucks and other construction vehicles must be limited to a defined area of the site. Runoff must be contained and waste and that I am a duly licensed 930.90 R properly disposed of. No engine degreasing is allowed onsite. Professional Engineer under the laws 936.14 TC 935.74 TC936.0 G of the state of Minnesota. 935.64 GL 935.24 GL 23.All liquid and solid wastes generated by concrete washout operations must be contained in a leak-proof containment facility or impermeable liner. 933.20 TC 932.46 TC 933.3 C 935.95 B* A compacted clay liner that does not allow washout liquids to enter ground water is considered an impermeable liner. The liquid and solid 932.5 C 932.70 GL 931.96 GL wastes must not contact the ground, and there must not be runoff from the concrete washout operations or areas. Liquid and solid wastes must 936.54 TC 932.3 C 936.04 GLbe disposed of properly and in compliance with MPCA regulations. A sign must be installed adjacent to each washout facility to inform concrete 936.14 TC 931.91 TC equipment operators to utilize the proper facilities. Michael A Murphy, P.E. 935.64 GL 931.41 GL 933.22 TC Date: Reg. No.:05.17.1342808 24.Upon completion of the project and stabilization of all graded areas, all temporary erosion control facilities (silt fences, hay bales, etc.) shall be 932.72 GL removed from the site. 933.32 C 932.32 TC 935.35 TC* 935.30 TC 931.82 GL 936.0 B* 934.85 GL* 934.80 GL* Rev.DateDescription 25.All permanent sedimentation basins must be restored to their design condition immediately following stabilization of the site. 934.80 B* 105.17.13Bldg. Permit Submittal 26.Contractor shall submit Notice of Termination for MPCA-NPDES permit within 30 days after Final Stabilization. 205.28.13City Submittal GRADING NOTES 306.05.13Bid Package #1 933.02 TC CONCRETE WASHOUT 933.24 TC 932.52 GL 932.74 GL 1.Tree protection consisting of snow fence or safety fence installed at the drip line shall be in place prior to beginning any grading or demolition 933.34 Cwork at the site. ROCK 935.5 B* 2.Allelevations with an asterisk (*) shall be field verified. If elevations vary significantly, notify the Engineer for further instructions. CONSTRUCTION 932.05 TC 932.05 B* ENTRANCE 931.55 GL 3.Grades shown in paved areas represent finish elevation. 12136036.000 Project #: 4. Drawn By:SJM / CKJ 5.All construction shall be performed in accordance with state and local standard specifications for construction. Checked By: ZRE / MAM Issue Date: 05.15.13 6.The project intent is to balance cuts and fill volumes on site. Grading modifications required to balance earthwork shall be approved by the Engineer. Sheet Title: GRADING AND 7.Finish grading shall be completed prior to irrigation installation. It is anticipated that finish grading touch EROSION CONTROL up will be needed after irrigation installation. PLAN Sheet: NORTH C3 0 102040 Sheet:5ofof10 M:\Projects\Projects - 2013\12136036- Lexington Station\C. Design\Drawing Files\12136036 C3 - Grading.dwg ALL EXISTING ITEMS AND CONDITIONS SHOULD BE VERIFIED BY THE CONTRACTOR BEFORE CONSTRUCTION