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KEY NOTES
<br />GRADING NOTES
<br />0
<br />ROCK CONSTRUCTION ENTRANCE,
<br />05
<br />INLET PROTECTION,
<br />1.
<br />Tree protection consisting of snow fence or safety fence installed at the drip line shall be in place prior to beginning any
<br />SEE DETAIL 4/C501
<br />SEE DETAIL 8/C501
<br />grading or demolition work at the site.
<br />0
<br />SILT FENCE,
<br />O
<br />RAIN GUARDIAN W/ 7'x7' CL 3 RIP
<br />2.
<br />All elevations with an asterisk (*) shall be field verified. If elevations vary significantly, notify the Engineer for further
<br />SEE DETAIL 5/C501
<br />RAP & TYPE IV GEOTEXTILE
<br />instructions.
<br />03
<br />RIP RAP WIER OVERFLOW,
<br />SEE DETAIL 1/C502
<br />3.
<br />Grades shown in paved areas represent finish elevation.
<br />SEE DETAIL 6/C501
<br />0POND/BASIN
<br />PROTECTION
<br />SILT FENCE, SEE DETAIL 5/C501
<br />4.
<br />Restore all disturbed areas with 5" of good quality topsoil and seed.
<br />0
<br />EROSION CONTROL BLANKET,
<br />SEE DETAIL 7/C501
<br />O8
<br />CURB AND GUTTER PERIMETER
<br />5.
<br />All construction shall be performed in accordance with state and local standard specifications for construction.
<br />PROTECTION TO BE INSTALLED
<br />AFTER CURB AND GUTTER
<br />7.
<br />At the completion of the project and prior to turf establishment and seeding, the Contractor shall de -compact the soils in areas
<br />INSTALLATION
<br />that were disturbed as a result of construction activities. De -compaction shall consist of ripping, cultivating, or scarifying the
<br />SILT FENCE, SEE DETAIL 5/C501
<br />top 12" in an attempt to improve the infiltration characteristics of the soils. The Contractor shall use low impact earth moving
<br />(BIO LOGS MAY BE USED IN THIS
<br />equipment to prevent compaction of the underlying soils, for both temporary and final grading and smoothing of the topsoil
<br />AREA AS AN APPROVED EQUAL)
<br />prior to seeding.
<br />8. Infiltration areas to be marked off and protected from compaction. Only tracked and low impact equipment allowed in bottom
<br />Iof
<br />basin. If compaction does occur, soils shall be scarified to a depth of 18".
<br />9. All sidewalks shall be constructed with a cross slope not to exceed 2%. Maximum 2% slope
<br />to be maintained through
<br />driveway.
<br />I9A�
<br />2
<br />909.00 L*
<br />- 1 -
<br />5E0gie
<br />/
<br />910.48 TC 000 0 00,�0�00°0°po0o
<br />y(
<br />908.50 910. G
<br />00000 0 0e-ooD")C' c�°I o 0
<br />9I 0.15 GL °ob° 0 0 0 0 0� d
<br />909.40 C
<br />PROPOSED BUILDI G
<br />/
<br />8
<br />2A
<br />60
<br />, - �1�1�TE - -, _ _ 000000° °°°°°°°000 Q. 'V
<br />909.84 GL - \ 00000000 0000000 0 01 'o
<br />, 910.88 TC o o o o 0 0 0
<br />909.71 C
<br />EOF
<br />4
<br />FFE = 911.7
<br />/
<br />910.67 TC 910.55 GL
<br />o o o o 0 0 0 0
<br />�o 00000o 0o0°0o
<br />909.25
<br />L
<br />2
<br />GFE = 910.9
<br />--_\
<br />2.98%
<br />/
<br />910.34GL HP
<br />o
<br />4
<br />/
<br />I
<br />910.02 TC
<br />909.69 GL
<br />609.9
<br />C
<br />L
<br />911.20 G
<br />909.61 C
<br />>LJ
<br />MIN. LOWEST FLOOR = 905.00
<br />//909.6
<br />MIN. LOWEST OPENING = 909.93
<br />10.48 T
<br />r 1 20 G 911.17 G
<br />PROPOSED BUILDING
<br />I
<br />9�L
<br />PROPOSED BUILDING
<br />2
<br />SANMH
<br />I
<br />FFE J911.7
<br />o-
<br />3.54%
<br />FFE _ 912.00
<br />RIM=910.0
<br />INV=890.9
<br />7 GFE = 910.9
<br />o
<br />QnQ 86 T
<br />GFE = 911 20
<br />100-YR HWL = 907.)3
<br />BOT = bb5.
<br />X%I
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<br />X o.
<br />#14 1 I 1
<br />I
<br />II
<br />I
<br />909.53
<br />6 /Z-
<br />909.50 GL
<br />u
<br />a 908.50 G 910.9 G
<br />5
<br />PROPOSED BUILDINGI
<br />FFE = 911.7
<br />GFE = 910.9
<br />MIN. LOWEST FLOOR = 905.00
<br />MIN. LOWEST OPENING = 909.93
<br />PROPOSED BUILDING
<br />FFE 911.7
<br />GFE = 910.9
<br />7
<br />4.10%
<br />i
<br />>
<br />908.50 G k 91�
<br />Q
<br />M
<br />u
<br />4.0
<br />PROPOSED BUILDING
<br />FFE =912.00
<br />I
<br />GFE = 911.20
<br />MIN. LOWEST FLOOR = 907.00
<br />MIN. LOWEST OPENING = 910.71
<br />PROPOSED BUILDING
<br />/
<br />FFE = 912.00
<br />GFE =911.20
<br />8
<br />-
<br />910:55 TC
<br />I GL
<br />PROPOSED BUILDING
<br />2.79%
<br />FFE = 912.00
<br />-
<br />OFE = 911.20 -
<br />V
<br />911.20 G/
<br />910.6
<br />10.3 GL
<br />911.20 G 911.17 G
<br />910.04 G 910.44,GL / /
<br />/I I / 910.44 B
<br />/ I >
<br />909.44 GL
<br />LP
<br />910.17 TC CB
<br />' 909.84 GL RIM=910.8
<br />• \ � 910.77 TC #81 INV=907.1
<br />/ 910.44 GL 0 1 1 1-/,
<br />12"CIP
<br />W11WHIM
<br />�■_�um
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<br />� I / v Z�
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<br />RATION BASIN
<br />,I jl -Yj H = 908.37
<br />XI IXI =907. v
<br />v
<br />v
<br />\\SAN MH
<br />I' f�IM=911
<br />> O I \=889
<br />1 �
<br />60" WATERMAIN
<br />SYMBOL LEGEND
<br />- - - - - - - 950 ------
<br />EXISTING CONTOURS
<br />SPOT ABBREVIATIONS:
<br />950
<br />PROPOSED CONTOURS - MAJOR INTERVAL
<br />950.00 TC TC - TOP OF CURB
<br />949
<br />PROPOSED CONTOURS - MINOR INTERVAL
<br />949.50 GL GL - GUTTER LINE
<br />- - - - - - - - - - - - - - - - -
<br />GRADE BREAK LINE
<br />B - BITUMINOUS
<br />GRADE SLOPE
<br />C - CONCRETE
<br />G - GROUND
<br />SILT FENCE
<br />EOF - EMERGENCY OVERFLOW
<br />0000000
<br />RIP -RAP / ROCK CONST. ENTRANCE
<br />LP - LOW POINT
<br />HP - HIGH POINT
<br />EROSION CONTROL BLANKET
<br />(*) -EXISTING TO BE VERIFIED
<br />INLET PROTECTION
<br />EROSION CONTROL NOTES
<br />1.
<br />Owner and Contractor shall obtain MPCA-NPDES permit. Contractor shall be responsible for all fees pertaining to this permit. The SWPPP
<br />Ishall
<br />be kept onsite at all times.
<br />2.
<br />Install temporary erosion control measures (inlet protection, silt fence, and rock construction entrances) prior to beginning any excavation or
<br />Idemolition
<br />work at the site.
<br />3.
<br />Erosion control measures shown on the erosion control plan are the absolute minimum. The contractor shall install temporary earth dikes,
<br />I
<br />sediment traps or basins, additional siltation fencing, and/or disk the soil parallel to the contours as deemed necessary to further control
<br />erosion. All changes shall be recorded in the SWPPP.
<br />4.
<br />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'
<br />I
<br />into the construction zone.
<br />I5.
<br />The toe of the silt fence shall be trenched in a minimum of 6". The trench backfill shall be compacted with a vibratory plate compactor.
<br />6.
<br />All grading operations shall be conducted in a manner to minimize the potential for site erosion. Sediment control practices must be
<br />Iestablished
<br />on all down gradient perimeters before any up gradient land disturbing activities begin.
<br />7
<br />Z
<br />7.
<br />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
<br />I
<br />activity in that portion of the site has temporarily or permanently ceased. Temporary stockpiles without significant silt, clay or organic
<br />O
<br />components (e.g., clean aggregate stockpiles, demolition concrete stockpiles, sand stockpiles) and the constructed base components of roads,
<br />parking lots and similar surfaces are exempt from this requirement.
<br />I8.
<br />U
<br />The normal wetted perimeter of any temporary or permanent drainage ditch or swale that drains water from any portion of the construction site,
<br />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
<br />I
<br />water. Stabilization of the last 200 lineal feet must be completed within 24 hours after connecting to a surface water. Stabilization of the
<br />remaining portions of any temporary or permanent ditches or swales must be complete within 14 days after connecting to a surface water and
<br />I9.
<br />construction in that portion of the ditch has temporarily or permanently ceased.
<br />^
<br />Pipe outlets must be provided with energy dissipation within 24 hours of connection to surface water.
<br />Z
<br />10.
<br />All be installed filter fabric Minnesota Department Transportation Standard
<br />O
<br />I
<br />riprap shall with a material or soil separation and comply with the of
<br />Specifications.
<br />U
<br />I 11.
<br />All storm sewers discharging into wetlands or water bodies shall outlet at or below the normal water level of the respective wetland or water
<br />body 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
<br />O
<br />wetland or water body.
<br />I12.
<br />LL
<br />All storm sewer catch basins not needed for site drainage during construction shall be covered to prevent runoff from entering the storm sewer
<br />Catch basins for drainage during be inlet
<br />system. necessary site construction shall provided with protection.
<br />1
<br />O
<br />13.
<br />In areas where concentrated flows occur (such as swales and areas in front of storm catch basins and intakes) the erosion control facilities
<br />Z
<br />shall be backed by stabilization structure to protect those facilities from the concentrated flows.
<br />I14.
<br />Inspect the construction site once every seven days during active construction and within 24 hours after a rainfall event greater than 0.5 inches
<br />in 24 hours. All inspections shall be recorded in the SWPPP.
<br />I15.
<br />All silt fences must be repaired, replaced, or supplemented when they become nonfunctional or the sediment reaches 1/3 of the height of the
<br />Z
<br />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
<br />Ithe
<br />SWPPP.
<br />C-
<br />G
<br />16.
<br />If sediment escapes the construction site, off -site accumulations of sediment must be removed in a manner and at a frequency sufficient to
<br />-
<br />Iminimize
<br />off -site impacts.
<br />J
<br />Wn/
<br />17.
<br />All soils tracked onto pavement shall be removed daily.
<br />L^L
<br />I18.
<br />All infiltration areas must be inspected to ensure that no sediment from ongoing construction activity is reaching the infiltration area and these
<br />areas are protected from compaction due to construction equipment driving across the infiltration area.
<br />I19.
<br />Temporary soil stockpiles must have silt fence or other effective sediment controls, and cannot be placed in surface waters, including
<br />stormwater conveyances such as curb and gutter systems, or conduits and ditches unless there is a bypass in place for the stormwater.
<br />20.
<br />Collected sediment, asphalt and concrete millings, floating debris, paper, plastic, fabric, construction and demolition debris and other wastes
<br />must be disposed of properly and must comply with MPCA disposal requirements.
<br />CB I 21.
<br />Oil, gasoline, paint and any hazardous substances must be properly stored, including secondary containment, to prevent spills, leaks or other
<br />RIM=911 8
<br />discharge. Restricted access to storage areas must be provided to prevent vandalism. Storage and disposal of hazardous waste must be in
<br />1 1 -- I I I - I INV=906.6 compliance with MPCA regulations.
<br />c [W 1 60" WATERMAIN a #80
<br />#6 � #4 - > 1>>RCP >> 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
<br />- - - - - #82 ? - - �12- o properly disposed of. No engine degreasing is allowed onsite.
<br />#8 - / 5 - - 23 All li uid and solid wastes enerated b concrete washout o orations must be contained in a leak- roof containment facilit or im ermeable
<br />W
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<br />i
<br />/60" WATERMAIN
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<br />15"RCP
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<br />COUTY RD.
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<br />SAN MH
<br />RIM=911.8
<br />INV=887.7
<br />(SLUDGE)
<br />- - - liner. A compacted clay liner that does not allow washout liquids to enter ground water is considered an impermeable liner. The liquid and
<br />solid wastes must not contact the ground, and there must not be runoff from the concrete washout operations or areas. Liquid and solid
<br />J 60" WATERMAIN
<br />1 wastes must be disposed of properly and in compliance with MPCA regulations. A sign must be installed adjacent to each washout facility to
<br />1 I inform concrete equipment operators to utilize the proper facilities.
<br />�1x STS MH
<br />IIV=912.6 24. Upon completion of the project and stabilization of all graded areas, all temporary erosion control facilities (silt fences, hay bales, etc.) shall be
<br />>> removed from the site.
<br />_ - 25. All permanent sedimentation basins must be restored to their design condition immediately following
<br />>> stabilization of the site.
<br />> > \ � � > - > © SAN tv1H > >
<br />'81zZ - RIM=912.3 26. Contractor shall submit Notice of Termination for MPCA-NPDES permit within 30 days after
<br />INV=889.3 N I I - Final Stabilization.
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<br />I hereby certify that this plan,
<br />specifications or report was prepared
<br />by me or under my direct supervision
<br />and that I am a duly licensed
<br />Professional Engineer under the laws
<br />of the state of Minnesota.
<br />Thomas J. Herkenhoff, P.E.
<br />Date: 11.14.22 Lic. No.: 25520
<br />Rev. Date Description
<br />Project #: 12226046
<br />Drawn By: KBK
<br />Checked By: TJH
<br />Issue Date: 11.14.22
<br />Sheet Title:
<br />GRADING AND
<br />EROSION CONTROL
<br />PLAN
<br />Sheet:
<br />P:\Projects\Projects - 2022\12226046 - Mounds View Residential\C. Design\Drawing Files\12226046 C300.dwg
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