HomeMy WebLinkAbout8-1-14 Grading Plan RevisionEROSON AND SEDIMENT CONTROL PLAN AND
CERTIFICATE OF SURVEY FOR
hyala M 4
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\ \ \ Line�arallel with South /
li'� of Gov't Lot 1, Sec. 9/
\ \ ,Forth line of South 116 .8 feet /�
89°56'00" E 442.9 of Gov't Lot 1 / �� / -
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197.93
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Zr West line of Gov't Lot 1, BRICK & S fUCCO WALL 7' "
O Section 9-117-23 10' 1 Box
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EXISTING LM
BUILDING -----� _ 9 NO�l rr G / /
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(967.8)
BLACKTOI
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6-1, Gov't Lot 1
(967.7)
(967.9
This survey shows the boundaries of the above described property,
and the location of an encroaching fire pit and shed. It does not
purport to show any other improvements or encroachments.
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STORM WATER POLLUTION PREVENTION PLAN BEFORE AND DURING CONSTRUCTION
1. The following storm water pollution prevention measures are shown
3. Notification
on the plans and shall be implemented prior to construction:
" If the rock construction entrance is filled with sediment the contractor
* Install silt fence around the perimeter of areas to be graded as
shall either replace the entrance or add additional rock with 24 hours of
shown on the storm water pollution plan.
detection or notification
* All temporary stockpiles must have silt fence around them to trap
* If sediment from the sites observed on adjacent streets or other properties,
sediment.
the contractor shall remcr a the sediment within 24 hours of detection or notification.
* Construct rock construction entrance at field entrance to site.
* If sediment from the site !s observed on adjacent streets or other properties, the
" Phase grading work to minimize the duration that any disturbed soil
inspector shall identify than source and discharge location of the sediment and instruct
is exposed.
the contractor to implem= nt additional erosion and sediment controls at those
* Seed and mulch must be applied within 72 hours after rough grading is
locations to prevent fulure discharges.
complete.
* If building materials, chemicals, or general refuse is being used, stored, disposed
* Locate stockpiles a minimum of 50 feet from ponds and site drainage routes.
of, or otherwise managef41, inappropriately, the contractor shall correct such defects
* Remove any sediment that has been tracked onto public or private streets
within 24 hours of detection or notification.
within hours.
* If excessive sediments Or debris are observed at the flared end section outfalls,
* Remove any spill of fuel, oil, or other chemical immediately upon detection.
the inspector shall determine the source and discharge locations of such materials.
* Store construction materials in an orderly manner.
If the discharge has occurred on the property, the contractor shall remove the
* Repair silt fences, rock construction entrances, and other erosion and
sediments and debris wit iin 24 hours of notification and correct the source of
sediment controls as needed.
such materials as directed by the inspector.
2. Storm Water Pollution Prevention After Construction
The contractor shall implement the following storm water pollution prevention
measures after construction:
* All distrubed areas without permanent impermeable surfaces will be
vegetated for final stabilization.
* Silt fence and other erosion and sediment control devices will be removed
after vegetation is established
* Contractor shall maintain a construction activity log with dates of major
grading activities, dates grading stops and spills.
Temporary Erosion Control and Sequencing
1. Install perimeter control fencing per the standard detail plates. No more than
600 linear feet of silt fence should be continuous and collecting at one point.
Undulate the silt fence or use "simles" or crescents of silt fence.
2. Install a rock construction entrance per the standard detail plate. Rock pad
exits are needed where the site exits to the private drive. Rock pads should
be 3 inch rock, 6 inches deep, and 75 feet long and span the full width of the
exit. Geotextile fabric should be placed under the rock.
3. Use horizontal slope grading
4. Install erosion control around any temporary dirt stockpile areas.
5. All septic areas to be fenced off for protection. Protection to extend a
minimum of 20' outside of septic areas.
6. The contractor for the project shall inspect all erosion control BMP's after
each rainfall and repair as necessary and remove sediment from silf fences
if it reaches 1/3 capacity.
7. The contractor shall schedule his operations to minimize the amount of
disturbed area at any given time. The contractor shall limit his activities
to the grading limits as shown.
8. Remove all temporary BMP's once the site has reached final stabilization (a
uniform perennial vegetative cover with a density of 70 percent over all pervious
surface areas).
Permanent Erosion Control
1. All exposed soils on site must be stabilized with in 3 days:
a. Stabilization on slopes flatter than 4:1 consists of disc -anchored
mulch and seed; stabilization on slopes flatter than 4:1 and in areas
of concentrated flows consists of erosion blankets and seed.
2. Temporary mulch and seed is needed for exposed areas which sit fallow for
3:1 or steeper in 7 days, 3:1 to 10:1 in 14 days, and flatter than 10:1 in 21
days. Also open stockpiles need to have temporary stabilization if they are to
remain inactive for more than 7 days.
IN GOV'T`LOT 1, SECTION 9-117-23
HENNEPIN� COUNT) NhNNESOTA
Four -Judicial Land ark
A
N. EDGE OF PAVER DRIVEWAY
• Denotes iron marker found
o Denotes iron marker set
Bearings shown are based upon an assumed datum
—952— Existing contour line, mean sea level datum
E— Proposed contour line, mean sea level datum
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