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SWPP NARRATIVE VEGETATION GROUND COVER SCHEDULE
<br />This commercial project construction will consist of site clearing, grading, utilities, and parking 1. Stabilization of all exposed soil areas must be initiated immediately but in no
<br />construction. Construction is planned for 2022. case completed later than seven (7) days after the construction activity in that
<br />portion of the site has temporarily or permanently ceased. Seeding and
<br />The permanent stormwater treatment for this project is an infiltration basin on -site and is mulching shall conform to the latest NPDES requirements for installation
<br />also part of an off -site regional pond located east of this project. schedule with regards to grading.
<br />2. Permanent turf ground cover shall include all disturbed areas be covered with a
<br />First, perimeter silt fence and rock construction entrance shall be installed. Then site work minimum 6" topsoil and sodded or seeded as allowed by City, or as proposed on
<br />shall commence. The contractor shall dispose all debris off -site within 24 hours. Then the City approved landscape plan for the project. If not otherwise specified, turf
<br />site can be graded, utilities installed, building constructed, curbing and pavements installed, seed to be MnDOT mix 25-131 applied at 220 Ibs/ac. Infiltration basin
<br />final grade tolerance, and landscape final stabilization. Once final grade is established and
<br />certified, the site shall be stabilized with seed and mulch or sod. Once vegetation is seed to be 33-261 applied at 35 Ibs/ac in bottom of basin and up 3
<br />established, temporary erosion control measures shall be removed. feet from bottom, with bottom of basin mulched with clean grain straw
<br />(Mn/DOT Type 3) applied at 2 tons/cc. MnDOT Type 1 mulch shall be
<br />applied at 2 tons/ac and disc anchored in areas not covered by sod or
<br />POLLUTION PREVENTION NOTES erosion blanket. Seeding and mulching shall conform to the latest NPDES
<br />requirements for installation schedule with regards to grading.
<br />Solid waste: collected sediment, asphalt and concrete millings, floating debris, paper, plastic, 3. Temporary ground cover to be MnDOT seed mix 22-111 shall be applied at 31
<br />fabric, construction debris and other wastes must be disposed of properly off -site and must Ibs/ac, or equivalent as approved by City. MnDOT Type 1 mulch shall be applied
<br />comply with MPCA requirements. at 2 tons/ac and disc anchored in areas not covered by sod or erosion blanket.
<br />4. Fertilizer for turf shall be MnDOT Type 3 22-5-10 and applied at 350 Ib/ac.
<br />Hazardous materials: oils, gasoline, paint, and any hazardous substance must be properly Disc fertilizer into top 3" of soil. Fertilizer for stormwater basin shall be Type 4,
<br />stored, including secondary containment, to prevent spills, leaks or other discharge. Restricted 17-10-7 at 120 Ib/ac. Specification reference is MnDOT 2574.
<br />access to storage areas must be provided to prevent vandalism. Storage and disposal must 5. Dormant seed mix shall be used after November 1 or when temperatures do not
<br />be in compliance with MPCA regulations. exceed 40° F, using same rates specified above. No seed shall be placed on
<br />External washing of trucks or other construction vehicles is not allowed on site. No engine snow or ice greater than 2" in depth.
<br />degreasing is allowed on site. No concrete washouts are allowed on site. 6. Any seeded areas that do not become established with vegetation shall be
<br />re -seeded at Contractor's expense.
<br />Concrete truck washout is not to be allowed on site unless washout waste is contained with 7• Erosion blanket shall be installed in seed areas with ground surface slopes of
<br />no discharge to ground surface or site drainage facilities. Containment systems are to be 4H:1V or steeper.
<br />located a minimum 50 feet away from drainage facilities and watercourses. Containment
<br />systems shall have on impermeable liner. Containment system shall be clearly marked with EROSION CONTROL NOTES
<br />signage.
<br />All sanitary waste must be collected from portable toilet units on site by a licensed waste 1. All devices necessary to control erosion and sediment (I.E. perimeter silt fence, rock
<br />management contractor. The units must be secured and shall be maintained on a regular construction entrances, swales, ponds, berms, ETC.) shall be installed prior to any other
<br />basis as needed to prevent overfilling. construction operations.
<br />2. After completion of final grading, exposed soils must be permanently stabilized within 7
<br />days. Stabilization shall consist of disc -anchored seed & mulch, HECP with fiber
<br />EROSION CONTROL MAINTENANCE SCHEDULE reinforced matrix, erosion blanket with seed, or sod.
<br />3. The site must be kept in a well drained condition at all times. The contractor shall be
<br />1. Erosion control measures shall be inspected by the contractor's representative and responsible for temporary ditches, or other means necessary to ensure proper drainage.
<br />maintained by the contractor every Friday and within 24 hours after any rainfall event The building pad must be provided with a positive outflow. This work shall be incidental
<br />larger than 1/2" until the project is completed. Maintenance requirements are as follows: to the grading contract.
<br />4. Entering/exitingof the site shall occur only at rock construction entrance to reduce
<br />silt fence - 1 /3 height of fence or damaged, remove sediment and/or repair fence within y
<br />24 hours; rock entrance - refresh as necessary to conform to detail; inlet protection tracking of dirt onto paved streets. Sediment tracked onto streets during working hours
<br />must be reclaimed via street scraping and sweeping
<br />inserts - remove sediment after each rain event, clean or replace filter when clogged; the end of each working day.
<br />surface water - drain and stabilize, within 7 days of discovery; and street sweeping - 5. Storm water discharge pipe outlet energy dissipation shall
<br />ll be provided by ripwith
<br />remove all sediment tracked onto paved surfaces within 24 hours or as directed by City size, quantity, and placement in accordance with City standards. Rip -rap installation
<br />rap tallation
<br />Engineer. shall be within 24 hours of pipe installation.
<br />2. Replacement - Fabric shall bee replaced promptly when it decomposes or becomes 6. Install silt fence around all temporary inactive stockpiles which are not place within
<br />ineffective before the barrier longer necessary. existing silt fence area or other perimeter erosion controls.
<br />7. Stabilization of temporaryor permanent drainage ditches that drain water from the
<br />3. Any sediment remaining in place after silt fence is no longer required shall be dressed to P g
<br />construction site must be initiated within 24 hours of connectingthe drainage ditch to
<br />conform with the existing grade, prepared, and seeded with appropriate seed mix, as g
<br />any storm water conveyance system and must be completed using erosion blanket.
<br />directed by the engineer.
<br />4. Removal of the silt fence- Silt fences shall be removed when they have served their useful 8. Sufficient personel, equipment, and materials shall be mobilized within 24 hours of
<br />purposebut not before the upward sloping area has been permanently stabilized. written order (ie. email) by the owner or owners representative to conduct corrective
<br />work and install temporary erosion control work in the case of an emergency.
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<br />EROSION CONTROL INSTALLATION SCHEDULE
<br />1. Silt fence shall be installed or restored prior to any construction. Silt fence
<br />shall be located as shown to intercept runoff. The area located beyond the
<br />perimeter silt fence shall not be disturbed during construction.
<br />2. Rock Construction Entrance shall be installed prior to grading operations.
<br />3. All storm sewer inlets shall have inlet protection inserts installed. Inserts shall
<br />be "Road rain -Top Slab" or "Road Drain -Curb & Gutter" inlet protection devices
<br />as manufactured by WIMCO (or approved equal) and installed per manufacture's
<br />recommendations.
<br />4. All erosion control installations shall remain in place and be maintained in good
<br />condition by the contractor until the site has been re -vegetated, at which time
<br />it shall be removed by the contractor. For proposed paved surface areas, the
<br />contractor may remove necessary silt fencing to construct roadway, while
<br />maintaining adequate erosion control in adjacent areas.
<br />5. Sufficient topsoil shall be stockpiled to allow for the replacement of 6" topsoil
<br />for disturbed areas to be re -vegetated.
<br />6. The contractor shall schedule site grading, utility installation and roadway
<br />construction so that the general site can be mulched and re -seeded soon after
<br />disturbance. Areas that will not be subject to construction traffic for 7 days
<br />shall be seeded and mulched or sodded within 7 days of final grading.
<br />SWPPP AMENDMENTS
<br />1. One of the individuals described in Responsible Party information must complete
<br />all SWPPP changes. Changes involving the use of a less stringent BMP must
<br />include a justification describing how the replacement BMP is effective for the
<br />site characteristics.
<br />2. NPDES permittees must amend the SWPPP to include additional or modified
<br />BMP's as necessary to correct problems identified or address situations
<br />whenever there is a change in design, construction, operation, maintenance,
<br />weather or seasonal conditions having a significant effect on the discharge of
<br />pollutants to surface waters or groundwater.
<br />3. NPDES permittees must amend the SWPPP to include additional or modified
<br />BMP's as necessary to correct problems identified or address situations
<br />whenever inspections or investigations by the site owner or operator, USEPA or
<br />MPCA officials indicate the SWPPP is not effective in eliminating or significantly
<br />minimizing the discharge of pollutants to surface waters or groundwater or the
<br />discharges are causing water quality exceedances or the SWPPP is not
<br />consistent with the objectives of a USEPA approved TMDL.
<br />INFILTRATION BASIN NOTES
<br />1. Iniltration area shall be staked off during construction to restrict heavy equipment
<br />traffic from compacting native soils.
<br />2. Install appropriate temporary erosion control devices to prevent sediment from
<br />enteringthe practice during construction.
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<br />3. Grading of the infiltration basin shall be accomplished using low impact
<br />earth-movingequipment to prevent compaction of the underlying soils. Small
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<br />tracked dozers and skid -steers with runner tracks are recommended.
<br />4. In the event that sediment is introduced into the BMP during or immediately
<br />following excavation, this material will need to be removed from the basin prior
<br />to initiating the next step in the construction process.
<br />5. Install sediment control around basin after completion of basin grading.
<br />6. Seeding and installation of erosion control shall be completed within 48 hours of
<br />final grading of basin.
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<br />RESPONSIBLE PARTY
<br />Contact information for the responsible
<br />party for erosion control is:
<br />Owner: LUND STORAGE
<br />Contractor: Not Known Yet
<br />Manager: Steve Krause
<br />763-331-5178
<br />steve@sdkorchitects.com
<br />DESIGN CALCULATIONS
<br />Design calculations, including soil types are
<br />on file with: Civil Engineering Site Design
<br />SWPPP Designer: Scott Dahlke (Expires 2025)
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<br />AFTER COMPLETION OF INFILTRATION BASIN GRADING, X888.4
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<br />/ \ \ CONTRACTOR SHALL REMOVE ANY SEDIMENT
<br />DEPOSITED IN BASIN, RE -STABILIZE SLOPES, AND
<br />INSTALL FIBER LOG AROUND BASIN. REMOVAL OF
<br />ANY SEDIMENT NECESSARY SHALL BE CONSIDERED
<br />INCIDENTAL TO THE GRADING CONTRACT.
<br />0 30 60 90
<br />GRAPHIC SCALE IN FEET
<br />LEGEND:
<br />908
<br />Existing Contours
<br />>>
<br />Existing Storm Sewer
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<br />Proposed Contours
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<br />Proposed Storm Sewer
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<br />Proposed Silt Fence
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<br />Proposed Fiber Logs
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<br />Proposed Storm Sewer Inlet Protection
<br />Flow Direction
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<br />Proposed Erosion Blanket
<br />SURVEY DATA
<br />SURVEY INFORMATION PROVIDED BY:
<br />MEYER ROHLIN LAND SERVICES
<br />708 1st AVENUE NE
<br />BUFFALO, MN 55313
<br />DATED: AUGUST 12, 2021
<br />BENCHMARK:
<br />TOP NUT OF HYDRANT @ SOUTHWEST CORNER OF
<br />OUTLOT F.
<br />ELEV.=895.66.
<br />PROJECT LOCATION
<br />NW 1/4 of the NE 1/4
<br />SECTION 11 TOWNSHIP 32, RANGE 26,
<br />SHERBURNE COUNTY, MINNESOTA.
<br />EXISTING PROPERTY DESCRIPTION
<br />OUTLOT F, ELK RIVER STATION, SHERBURNE COUNTY, MINNESOTA.
<br />PROPOSED LEGAL DESCRIPTION
<br />LOT 1, BLOCK 1, LUND RECREATIONAL STORAGE,
<br />SHERBURNE COUNTY, MINNESOTA.
<br />SITE DATA:
<br />EXISTING ZONING: PUD PLANNED UNIT DEVELOPMENT
<br />TOTAL LOT AREA: 96,544 SF = 2.21 AC.
<br />BUILDING COVERAGE AREA: 33,100 S.F. (28.3%)
<br />EXISTING IMPERVIOUS AREA: 2,606 S.F. (2.7%)
<br />PROPOSED IMPERVIOUS AREA: 58,035 S.F. (64.0%)
<br />(INCLUDES EXISTING IMPERVIOUS REMAINING)
<br />PROPOSED DISTURBANCE AREA: 86,205 S.F. (1.97 AC.)
<br />EROSION CONTROL QUANTITIES:
<br />ITEM:
<br />QUANTITY
<br />UNIT
<br />ROCK ENTRANCE
<br />1
<br />EA
<br />SILT FENCE
<br />1,205
<br />LF
<br />WOOD FIBER LOG
<br />262
<br />LF
<br />MULCH TYPE 1 &
<br />DISC ANCHOR 0.31
<br />AC
<br />EROSION BLANKET
<br />CAT. 3 NT 1,649
<br />SY
<br />INLET PROTECTION
<br />9
<br />EA
<br />LOCATION OF SWPPP REQUIREMENTS IN PLANS
<br />DESCRIPTION
<br />LOCATION
<br />STANDARD BMP DETAILS
<br />DETAILS ON SHEET C8
<br />STORMWATER CALCULATIONS
<br />STORM SEWER REPORT
<br />SITE MAP
<br />STORM SEWER REPORT
<br />GRADING PLAN SHEET C2
<br />TEMPORARY SEDIMENT BASIN
<br />DETAIL ON SHEET C8
<br />SUMP MANHOLE
<br />STORM SEWER SHEET C4
<br />SOILS DATA
<br />GEOTECHNICAL REPORT
<br />INDEX OF CIVIL SITE DRAWINGS:
<br />CO PROJECT LOCATION PLAN
<br />C1 SITE PLAN, PUD DEVELOPMENT PLAN
<br />C2 GRADING AND DRAINAGE PLAN
<br />C3 STORM SEWER PLAN
<br />C4 SWPPP
<br />C5 EXISTING CONDITIONS & REMOVAL PLAN
<br />C6-C7 DETAILS
<br />C8 LANDSCAPE PLAN
<br />CLIENT:
<br />SDK ARCHITECTS
<br />5075 Holly Lane N., Unit 7
<br />Minneapolis, MN 55446
<br />Steve Krause
<br />stevek@sdk-architects.com
<br />763-331-5178
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<br />FILE NO. 00865
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<br />SWPPP
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