HomeMy WebLinkAboutWPO201600047 Plan - E&S 2016-07-064
SEQUENCE OF CONSTRUCTION
NOTES:
THE ORIGINAL EROSION AND SEDIMENT CONTROL MEASURES ARE CURRENTLY EXISTING. THE PURPOSE
OF THIS EROSION CONTROL AMENDMENT IS TO CLOSE EXISTING SEDIMENT TRAP #2 SO THAT THE
SOUTH END PARKING LOT AND EMBANKMENT CAN BE CONSTRUCTED ACCORDINGLY. A SITE
WALK—THROUGH WAS CONDUCTED ON MAY 24, 2016 TO DETERMINE THE CONDITION OF THE SITE. THE
APPROXIMATE COMPLETED CONSTRUCTION HAS BEEN PORTRAYED ON PHASE 1 OF THIS DRAWING.
ALL EROSION AND SEDIMENT CONTROL MEASURES PROPOSED BY THIS AMENDMENT SHALL BE IN
ACCORDANCE WITH THE SPECIFICATIONS SHOWN ON THE EROSION AND SEDIMENT CONTROL DETAIL
SHEET.
PHASE 1
10° INSTALL THE CLEAN WATER DIVERSION SO THAT CLEAN WATER MAY BE DIVERTED AWAY FROM
EXISTING SEDIMENT TRAP #2. THE CLEAN WATER DIVERSION IS TO BE LINED WITH PLASTIC SO THAT
CLEAN WATER CAN ADEQUATELY FLOW TO THE EXISTING OUTLET PROTECTION LOCATED AT STRUCTURE
B2 AS SHOWN ON PHASE 1 OF THIS DRAWING.
2�. ONCE THE CLEAN WATER DIVERSION IS INSTALLED PROPERLY, SUPER SILT FENCE MAY BE
INSTALLED AT THE OUTER LIMITS OF SEDIMENT TRAP #2 TO CAPTURE THE REMAINING RUNOFF.
3i SEDIMENT TRAP #2 MAY BE REMOVED AND GRADED SO THAT THE SUPER SILT FENCE SERVES AS
THE MAIN EROSION CONTROL MEASURE CAPTURING THE RUNOFF DOWNSTREAM OF THE CLEAN WATER
DIVERSION.
PHASE 2
4�. INSTALL STORM SEWER STRUCTURES DOWNSTREAM OF THE CLEAN WATER DIVERSION. GRADE AND
STABILIZE THE AREA BETWEEN THE CLEAN WATER DIVERSION AND SUPER SILT FENCE.
INSTALL INLET PROTECTION AND DIVERSION DIKES AS SHOWN ON PHASE 2 OF THIS DRAWING.
/6\ AFTER INLET PROTECTION AND DIVERSIONS ARE IN PLACE, REMOVE THE CLEAN WATER DIVERSION.
A FINISH CONSTRUCTING THE REMAINING STORM SEWER AND PARKING LOT. FINALIZE GRADING AND
STABILIZE THE SITE.
AFTER SITE IS STABILIZED AND PERMISSION IS OBTAINED FROM THE EROSION CONTROL
INSPECTOR, REMOVE SILT FENCING AND OTHER REMAINING EROSION CONTROL MEASURES.
2'-0'"
0 4
0
0 0 0 0 0
0 0 0 0 0
*USE SAME STONE GRADATION AS OUTLET PROTECTION.
ssF SUPER SILT FENCE
CONSTRUCTION OF A SILT FENCE
(WITH WIRE SUPPORT)
1. SET POSTS AND EXCAVATE A 4"X4" 2. STAPLE WIRE FENCING TO THE POSTS.
TRENCH UPSLOPE ALONG THE LINE
OF POSTS.
J � moi_ Ndl
FLOW
3. ATTACH THE FILTER FABRIC TO THE WIRE
FENCE AND EXTEND IT INTO THE TRENCH.
:FLOW
4. BACKFILL AND COMPACT THE
EXCAVATED SOIL.
=vi
EXTENSION OF FABRIC AND WIRE INTO THE TRENCH.
FILTER FABRIC
�IIIW I WIRE
SOURCE: Adapted from Installation of Straw and Fabric Filter Barriers for Sediment Control, PLATE. 3.05—
Sherwood & Wyant
N=
10% SETTLEMENT
0.3' FREE BOARD
DIVERSION
Source: Va. DSWC
TYPICAL VEE—SHAPED DIVERSION
Plate 3.12-1
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Jimmy L. Taggart
Lic. No.
�° 22841'16
S 0 N A L E�G\�`v
PHASE 2 — EMBANKMENT '''♦
50 25 0 50 100
SCALE IN FEET
REVISIONS
DATE
JUNE 14, 2016
SCALE
1"=50'
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DATE
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SCALE
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FILE NUMBER
8648
SHEET
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FILE NUMBER
8648
SHEET
1 OF 1