HomeMy WebLinkAboutFDP201800006 Plan - Approved Floodplain Development Permit 2018-05-02LEGEND
EMERGENCY SPILLWAY
IBM OF GRADING
(ALSOOEXTENT & SCOPE
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DUE TO LEAK IN DAM, BENTONITE COULD BE TILLED INTO UPSTREAM FACE OF DAM
\
WIRE
SILT FENCE SUPPORTSD
S
X X X
SII.T FENCE
SF
x x x
OUTLET PROTECTIONOP
_
Q)
Er
W
PPSOILING
ST SEEDING
HULCENG
TO
& PS &
TOP OF DAM
TREE PROTECTION[
GENERAL EROSION AND SEDIMENT CONTROL NOTES
1. OULE MTHERWISE INDICATED, ALL VEGETATIVE AND STRUCTURAL EROSION AND SEDIMENT CONTROL PRACTICES
WILL BE CONSTRUCTED AND MAINTAINED ACCORDING TO MINIMUM STANDARDS AND SPECIFICATIONS OF THE
VIRGINIA EROSION AND SEDIMENT CONTROL HANDBOOK AND VIRGINIA REGULATIONS VR 625-02-00 EROSION
AND SEDIMENT CONTROL REGULATIONS.
2. ALL EROSION AND SEDIMENT CONTROL MEASURES ARE TO BE PLACED PRIOR TO OR AS THE FIRST STEP IN
6" SOLID P.V.C. PIPE (TYP.)
THE QUANTITIES OF MATERIAL WILL BE ESTIMATED ON THE
GIVEN DIMENTIONS. THE FINAL COST WILL BE BASED
ON THE ACTUAL QUANTITIES USED.
3. THE CONTRACTOR IS RESPONSIBLE FOR INSTALLATION OF ANY ADDITIONAL EROSION CONTROL MEASURES NECESSARY
TO PREVENT EROSION AND SEDIMENTATION AS DETERMINED BY THE PLAN APPROVING AUTHORITY.
4. ALL DISTURBING AREAS ARE TO DRAIN TO APPROVED SEDIMENT CONTROL MEASURES AT ALL TIMES DURING LAND
DISTURBING ACTIVITIES AND DURING SITE DEVELOPMENT UNTIL FINAL STABILIZATION IS ACHIEVED.
5. DURING DEWATERING OPERATIONS, WATER WILL BE PUMPED INTO AN APPROVED FILTERING DEVICE.
6. THE CONTRACTOR SHALL INSPECT ALL EROSION CONTROL MEASURES PERIODICALLY AND AFTER EACH RUNOFF -
PRODUCING RAINFALL EVENT. ANY NECESSARY REPAIRS OR CLEANUP TO MAINTAIN THE EFFECTIVENESS OF THE
EROSION CONTROL DEVICES SHALL BE MADE IMMEDIATELY.
7. THIS PLAN IS PROVIDED FOR THE IMPLEMENTATION OF EROSION AND SEDIMENT CONTROL MEASURES.
WATER SURFACE ELEV.
CROSS-SECTION
d I' —1
430
428
426
424
422
420
418
416
14
REVISIONS
W-11fo-Inka mil
PROPOSED" NEW HEADWALL
WITH PLASH PAD AND
PRESSURE TREATED BOLLARDS SPACED
WITH OPENINGS LESS THAN PIPE DIAMETERS.
PROPOSED ANTI -SEEP WALL AT MID PIPE JOINTS
OLD PIPES TO BE REPLACED WIHT 2 - 40.0 FT. N-12
SMOOTH WALL PIPES OF EQUIVALENT DIAMETER PIPES
436
434
32 PROPOSED NEW ENDHEADWALL
NOTE:
IN ORDER TO MONITOR THE SEEPAGE
AT THE BASE OF THE DAM IN THE
— — — 412 CIRCLE AREA, CLEARING SHALL BE
410 DONE DURING CONTRUCTION TO DETERMINE
408 TP THE SOURCE AND A REMEDY PROVIDED.
06 WILL BEENT DETERMIN DTHE ANDS AT THATETIME�UTION
6" PERFORATED P.V.C. PIPE (TYP.)
02
TP 4 TP
NOTE:
& PS & 3 OR 4 TREES TO BE REMOVED IN THIS AREA
NOTE:
THIS AREA WILL BE ALLOWED TO DRY OUT AND SLIGHTLY FILLED
.,. TO DO AWAY WITH MOSQUITO BREEDING GROUND.
IN ORDER TO MONITOR THE EFFLUENT, TP REA WILL BE SEEDED AND MAINTAINED.
INSTALL A TYPICAL 2'X4' DISTRIBUTION BOX
ON LINE. PAINT INSIDE OF BOX WHITE. x x__,,._x�_X X@X X—.x__ SF
S X --�—X--"_x
FRENCH DRAIN BLANKET ( SEE DETAIL)
6" OF TOPSOIL OVERLAY ( GRASS SEEDED)
DISTRIBUTION BOX
PLAN
N.T.S.
EDGE IVY CREEK
LENGTH VARIES WITH PLAN VIEW
6.0" TOPSOIL SHALL BE PLACED ON TOP OF FILTER AND SEEDED
2" OF SAND OR B STONE ENCASES THE GOEOTECH MATERIAL, STONE, AND PVC PIPING ALL AROUND
57 AGGREGATE STONE WITH P.V.C. PIPING INSIDE
STONE IS ENTIRELY ENCASED WITHIN GEOTECH MATERIAL
p' DRAINAGE DISCHARGE TO SMALL DITCH
.... TOWARD IVY CREEK
\ / / 6" SOLID P.V.C. PIPE (TYP.)
6" PERFORATED P.V.C. PIPE (TYP.)
DETAIL- FRENCH DRAIN BLANKET
N.T.S.
APPROVED
y the Al arie county
C (M 51 'u' �* P 0 ki p rm n t 0 �jm e
nt
DATE
APRIL 16, 2018
PLOT SCALE ONLY
1 "=30'
NiAn 'p
U WU III. QDEC M
Lic. No. 045649
��I�NAL
DWG. NAME
1800400
BLANKET DRAIN.DWGi
Q
C
4 `�" / / SHEET