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<br />EROSION CONTROL NOTES
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<br />NEW ELEMENTARY
<br />SCHOOL
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<br />PLAN
<br />B SECTION A -A
<br />NOTE:
<br />FW300 MIRAFI FABRIC OR EQUAL
<br />RIP -RAP AT OUTLETS
<br />NOT TO SCALE
<br />HARD SURFACE/
<br />PUBLIC ROAD
<br />1"-2" WASHED ROCK
<br />GEOTEXTILE FABRIC
<br />6" MINIMUM
<br />C
<br />60,
<br />1'•W.
<br />` •I
<br />WOVEN FILTER
<br />FABRIC
<br />MN/DOT CLASS III
<br />RIP -RAP
<br />WOVEN FILTER
<br />FABRIC
<br />WIRE MESH REINFORCEMENT
<br />HIGH FLOW AREAS
<br />METAL, WOOD POST, OR STAKE.
<br />8' MAX. SPACING, 2' INTO GROUND.
<br />DIRECTION
<br />OF RUNOFF
<br />-I I 1=1 1=
<br />'-III 11=
<br />NATURAL SOIL
<br />ENGINEERING FABRIC
<br />FABRIC ANCHORAGE
<br />TRENCH. BACKFILL WITH
<br />TAMPED NATURAL SOIL
<br />III -_ICI
<br />I I I- ___1 11
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<br />-III=
<br />III1'
<br />-L I I I I I I I -
<br />-I I_ I
<br />NOTE: DEPENDING UPON CONFIGURATION, ATTACH FABRIC TO WIRE MESH
<br />WITH HOG RINGS, STEEL POSTS WITH WIRES, OR WOOD POSTS WITH STAPLES.
<br />SILT FENCE
<br />INSTALLATION DETAIL
<br />NOT TO SCALE
<br />8" CURLEX SEDIMENT LOGS®
<br />WOOD STAKE OR SAND BAG
<br />WOOD STAKE TO ONLY
<br />PENETRATE NETTING,
<br />NOT CURLEX MATERIAL®
<br />"GROUND
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<br />75
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<br />1
<br />NOTES:
<br />1. STAKE OR SAND BAG SPACING SHALL BE 2 FEET O.C.
<br />SEDIMENT ROLL DETAIL
<br />2 ROCK CONSTRUCTION ENTRANCE
<br />C603 NOT TO SCALE
<br />SLOPE INSTALLATION
<br />12'
<br />(30 cm)
<br />2"-5"
<br />(5cm-12.5cm)
<br />6"
<br />(15 cm)
<br />C
<br />(15 cm)
<br />. . . . . . . . . .
<br />� •1' Y � � •1' � •1' Y � •1' Y Y
<br />3"
<br />7.Scm)
<br />3A
<br />::::::::::::::::::::....................................
<br />..................................
<br />D
<br />.. .........
<br />1. PREPARE SOIL BEFORE INSTALLING ROLLED EROSION CONTROL PRODUCTS (RECP's), INCLUDING ANY NECESSARY APPLICATION
<br />OF LIME, FERTILIZER, AND SEED.
<br />NOTE: WHEN USING CELL-O-SEED DO NOT SEED PREPARED AREA. CELL-O-SEED MUST BE INSTALLED WITH PAPER SIDE DOWN.
<br />2. BEGIN AT THE TOP OF THE SLOPE BY ANCHORING THE RECP's IN A 6" (15 CM) DEEP X 6" (15 CM) WIDE TRENCH
<br />WITH APPROXIMATELY 12" (30cm) OF RECP's EXTENDED BEYOND THE UP -SLOPE PORTION OF THE TRENCH. ANCHOR THE
<br />RECP's WITH A ROW OF STAPLES/STAKES APPROXIMATELY 12" (30 CM) APART IN THE BOTTOM OF THE TRENCH.
<br />BACKFILL AND COMPACT THE TRENCH AFTER STAPLING. APPLY SEED TO COMPACTED SOIL AND FOLD REMAINING 12" (30 CM)
<br />PORTION OF RECP's BACK OVER SEED AND COMPACTED SOIL. SECURE RECP's OVER COMPACTED SOIL WITH A ROW OF
<br />_ STAPLES/STAKES SPACED APPROXIMATELY 12" (30 CM) APART ACROSS THE WIDTH OF THE RECP's.
<br />3. ROLL THE RECP's (A.) DOWN OR (B.) HORIZONTALLY ACROSS THE SLOPE. RECP's WILL UNROLL WITH APPROPRIATE SIDE
<br />AGAINST THE SOIL SURFACE. ALL RECP's MUST BE SECURELY FASTENED TO SOIL SURFACE BY PLACING STAPLES/STAKES
<br />IN APPROPRIATE LOCATIONS AS SHOWN IN THE STAPLE PATTERN GUIDE. WHEN USING THE DOT SYSTEM , STAPLES/STAKES
<br />SHOULD BE PLACED THROUGH EACH OF THE COLORED DOTS CORRESPONDING TO THE APPROPRIATE STAPLE PATTERN.
<br />4. THE EDGES OF PARALLEL RECP's MUST BE STAPLED WITH APPROXIMATELY 2" - 5" (5 CM - 12.5 CM) OVERLAP DEPENDING
<br />5. CONSECUTIVE RECP's SPLICED DOWN THE SLOPE MUST BE PLACED END OVER END (SHINGLE STYLE) WITH AN APPROXIMATE
<br />3" (7.5 CM) OVERLAP. STAPLE THROUGH OVERLAPPED AREA, APPROXIMATELY 12" (30 CM) APART ACROSS ENTIRE
<br />a
<br />EROSION CONTROL BLANKET
<br />3
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<br />C603 NOT TO SCALE
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<br />NOT TO SCALE
<br />PLAN
<br />400 MICRON FILTER
<br />BAG IN EACH BASKET
<br />FILTER AREA
<br />5.65 FT
<br />OVERFLOW AREA
<br />0.42 FT'
<br />MAXIMUM OVERFLOW RATE (@ 7" HEAD)
<br />I .99 CF5
<br />MAXIMUM OVERFLOW RATE (@ 13" HEAD)
<br />2.79 CF5
<br />BASKET WEIGHT (EMPTY)
<br />I LB
<br />BASKET WEIGHT (FULL-APPKOX.)
<br />45 LB5
<br />2 BASKETS WITH 400 MICRON FILTER
<br />BAGS. TO BE CHECKED PERIODICALLY AND
<br />CLEANED OUT AFTER EACH RAIN EVENT
<br />AF.4 W
<br />PROFILE
<br />FITS NEENAH 1642 AND
<br />1733 FRAMES OR EQUAL
<br />a
<br />a
<br />a
<br />INFRASAFE INLET PROTECTION
<br />DEVICE (OR APPROVED EQ.)
<br />NOT TO SCALE
<br />PRE -MIXED PLANTING MEDIUM: PLAISTED'S RAIN GARDEN
<br />PEAT MIX (80% SAND, 20% PEAT),OR EQUAL. PLANTING
<br />MEDIUM SHALL PROVIDE 0.8"/HR TO 1.6"/HR INFILTRATION MNDOT SEED MIX: 33-261
<br />RATE AT SPECIFIED COMPACTION, VERIFY W/SUPPLIER. OR AS SPECIFIED ON LANDSCAPE PLAN
<br />VARIES EXTEND MODIFIED SOIL UP SLOPES
<br />(PER PLAN) TO POND OUTLET ELEVATION
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<br />6' MIN IN
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<br />EXCAVATE POND BOTTOM TO EXISTING PERMEABLE
<br />-III \\\\\\\\\\\\\\\\\\\
<br />EXISTING SOILS // // // // // // //\//\//\//\//�18" MINA/\//\ \//\//\ III- SOILS. REMOVE AND DISPOSE OF EXISTING TOPSOIL
<br />//// /////\1 I I1 AND ANY SOILS
<br />REPORT.
<br />NON -CONDUCIVE TO INFILTRATION.
<br />SE E G EO E
<br />LOOSEN/DECOMPACT SOIL BELOW
<br />-III1 I I1 I I1 I I1 I I1 I I1 I I1 I I1 I I1 I I1 I I1 I I1 I I1 I I1 I I=1 BASIN BOTTOM, 18"MINIMUM DEPTH.
<br />NOTES:
<br />1. THE EXISTING SOILS SHALL BE PROTECTED FROM COMPACTION DUE TO CONSTRUCTION TRAFFIC.
<br />AREAS SHALL BE STAKED AND MARKED OFF, WITH ONLY LOW IMPACT EQUIPMENT (TRACKED OR
<br />SIMILAR) ALLOWED.
<br />INFILTRATION BASIN
<br />CROSS SECTION
<br />1. Owner and Contractor shall obtain MPCA-NPDES permit. Contractor shall be responsible for all
<br />fees pertaining to this permit. The SWPPP shall be kept onsite at all times.
<br />2. Install temporary erosion control measures (inlet protection, silt fence, and rock construction
<br />entrances) prior to beginning any excavation or demolition work at the site.
<br />3. Erosion control measures shown on the erosion control plan are the absolute minimum. The
<br />contractor shall install temporary earth dikes, sediment traps or basins, additional siltation fencing,
<br />and/or disk the soil parallel to the contours as deemed necessary to further control erosion. All
<br />changes shall be recorded in the SWPPP.
<br />4. All construction site entrances shall be surfaced with crushed rock across the entire width of the
<br />entrance and from the entrance to a point 50' into the construction zone.
<br />5. The toe of the silt fence shall be trenched in a minimum of 6". The trench backfill shall be
<br />compacted with a vibratory plate compactor.
<br />6. All grading operations shall be conducted in a manner to minimize the potential for site erosion.
<br />Sediment control practices must be established on all down gradient perimeters before any up
<br />gradient land disturbing activities begin.
<br />7. All exposed soil areas must be stabilized as soon as possible to limit soil erosion but in no case
<br />later than 14 days after the construction activity in that portion of the site has temporarily or
<br />permanently ceased. Temporary stockpiles without significant silt, clay or organic components
<br />(e.g., clean aggregate stockpiles, demolition concrete stockpiles, sand stockpiles) and the
<br />constructed base components of roads, parking lots and similar surfaces are exempt from this
<br />requirement.
<br />8. The normal wetted perimeter of any temporary or permanent drainage ditch or Swale that drains
<br />water from any portion of the construction site, or diverts water around the site, must be stabilized
<br />within 200 lineal feet from the property edge, or from the point of discharge into any surface water.
<br />Stabilization of the last 200 lineal feet must be completed within 24 hours after connecting to a
<br />surface water. Stabilization of the remaining portions of any temporary or permanent ditches or
<br />swales must be complete within 14 days after connecting to a surface water and construction in
<br />that portion of the ditch has temporarily or permanently ceased.
<br />9. Pipe outlets must be provided with energy dissipation within 24 hours of connection to surface
<br />water.
<br />10. All riprap shall be installed with a filter material or soil separation fabric and comply with the
<br />Minnesota Department of Transportation Standard Specifications.
<br />11. All storm sewers discharging into wetlands or water bodies shall outlet at or below the normal
<br />water level of the respective wetland or water body at an elevation where the downstream slope is 1
<br />percent or flatter. The normal water level shall be the invert elevation of the outlet of the wetland or
<br />water body.
<br />12. All storm sewer catch basins not needed for site drainage during construction shall be covered to
<br />prevent runoff from entering the storm sewer system. Catch basins necessary for site drainage
<br />during construction shall be provided with inlet protection.
<br />13. In areas where concentrated flows occur (such as swales and areas in front of storm catch basins
<br />and intakes) the erosion control facilities shall be backed by stabilization structure to protect those
<br />facilities from the concentrated flows.
<br />14. Inspect the construction site once every seven days during active construction and within 24 hours
<br />after a rainfall event greater than 0.5 inches in 24 hours. All inspections shall be recorded in the
<br />SWPPP.
<br />15. All BMPs must be repaired, replaced, or supplemented when they become nonfunctional or the
<br />sediment reaches 1/3 of the capacity of the BMP. These repairs must be made within 24 hours of
<br />discovery, or as soon as field conditions allow access. All repairs shall be recorded in the SWPPP.
<br />16. If sediment escapes the construction site, off -site accumulations of sediment must be removed in a
<br />manner and at a frequency sufficient to minimize off -site impacts.
<br />17. All soils tracked onto pavement shall be removed daily.
<br />18. All infiltration areas must be inspected to ensure that no sediment from ongoing construction
<br />activity is reaching the infiltration area and these areas are protected from compaction due to
<br />construction equipment driving across the infiltration area.
<br />19. Temporary soil stockpiles must have silt fence or other effective sediment controls, and cannot be
<br />placed in surface waters, including stormwater conveyances such as curb and gutter systems, or
<br />conduits and ditches unless there is a bypass in place for the stormwater.
<br />20. Collected sediment, asphalt and concrete millings, floating debris, paper, plastic, fabric,
<br />construction and demolition debris and other wastes must be disposed of properly and must
<br />comply with MPCA disposal requirements.
<br />21. Oil, gasoline, paint and any hazardous substances must be properly stored, including secondary
<br />containment, to prevent spills, leaks or other discharge. Restricted access to storage areas must
<br />be provided to prevent vandalism. Storage and disposal of hazardous waste must be in
<br />compliance with MPCA regulations.
<br />22. External washing of trucks and other construction vehicles must be limited to a defined area of the
<br />site. Runoff must be contained and waste properly disposed of. No engine degreasing is allowed
<br />onsite.
<br />23. All liquid and solid wastes generated by concrete washout operations must be contained in a
<br />leak -proof containment facility or impermeable liner. A compacted clay liner that does not allow
<br />washout liquids to enter ground water is considered an impermeable liner. The liquid and solid
<br />wastes must not contact the ground, and there must not be runoff from the concrete washout
<br />operations or areas. Liquid and solid wastes must be disposed of properly and in compliance with
<br />MPCA regulations. A sign must be installed adjacent to each washout facility to inform concrete
<br />equipment operators to utilize the proper facilities.
<br />24. Upon completion of the project and stabilization of all graded areas, all temporary erosion control
<br />facilities (silt fences, hay bales, etc.) shall be removed from the site.
<br />25. All permanent sedimentation basins must be restored to their design condition immediately
<br />following stabilization of the site.
<br />26. Contractor shall submit Notice of Termination for MPCA-NPDES permit within 30 days after Final
<br />Stabilization.
<br />15198 Forest Boulevard
<br />Hugo, Minnesota 55038
<br />INDEPENDENT SCHOOL
<br />DISTRICT #624
<br />4855 Bloom Ave
<br />White Bear Lake, Minnesota 55110
<br />WOLD ARCHITECTS
<br />AND ENGINEERS
<br />332 Minnesota Street, Suite W2000
<br />Saint Paul, MN 55101
<br />woldae.com 1 651 227 7773
<br />I KRAUS-ANDERSON®
<br />501 South Eighth Street
<br />Minneapolis, MN 55404
<br />krausanderson.com 1 612 332 7281
<br />Larson
<br />Engineering, Inc.
<br />3524 Labore Road
<br />White Bear Lake, MN 55110
<br />651.481.9120 (f) 651.481.9201
<br />www.larsonengr.com
<br />© 2020 Larson Engineering, Inc. All rights reserved.
<br />I hereby certify that this plan, specifications or report
<br />was prepared by me or under my direct supervision
<br />and that I am a duly licensed Professional Engineer
<br />under the laws of the state of Minnesota.
<br />Matt Woodruff, P.E.
<br />Date: 11.20.2020 Lic. No.: 41885
<br />Revisions
<br />Description
<br />Date
<br />Num
<br />Addendum #2
<br />December 10, 2020
<br />1
<br />Pond Revisions
<br />January 15, 2021
<br />2
<br />City Submittal
<br />February 5, 2021
<br />Comm: 12196195
<br />Date: 11.20.2020
<br />Drawn: KBK
<br />Check: MJW North
<br />DETAILS
<br />NOT TO SCALE
<br />0
<br />0
<br />1
<br />0
<br />Scale: Per Plan
<br />C603
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