SW7120608_APPROVED PLANS_20170404

STORMWATER DIVISION CODING SHEET
POST -CONSTRUCTION PERMITS
PERMIT NO.
SW I/
DOC TYPE
El CURRENT PERMIT
APPROVED PLANS
❑ HISTORICAL FILE
DOC DATE
YYYYMMDD

A
SITE
HARVEY POINT
t--f1 DEFENSE TESTING
>� FACILITY
�f.
ALBEMALE SOUND
VICINITY MAP
NTS
HP
CO
BOUNDARY.DWG
12/2/201G
NOTES:
1. OWNER / APPLICANT: UNITED STATES OF AMERICA
DEPARTMENT OF THE NAVY
1510 GILBERT STREET
NORFOLK. VA
VIRGINIA BEACH, VA 23511-2699
2. TAX MAP PARCEL ID. 2-0073-0031
PIN: 7886-94-5371
3. LOCATION: HARVEY POINT DEFENSE TESTING ACTIVITY FACILITY
HARVEY POINT, NC
4. SCOPE OF PROJECT: THE PURPOSE OF THIS PLAN IS TO UPDATE THE
CURRENT CONDITIONS ASSOCIATED WITH NCDENR LOW —DENSITY
STORMWATER PERMIT #SW7120608 AND TO DEMONSTRATE ADEQUATE
TREATMENT FOR THE ADDITION OF 6,780 SF OF NEW (AND FUTURE)
IMPERVIOUS COVERAGE WITHIN THE HIGH —DENSITY PORTION OF THE
PROJECT AREA AND TO DOCUMENT THE ADDITION OF 200 SF OF
COVERAGE WITHIN THE LOW —DENSITY PORTION OF THE PROJECT AREA.
5. TOPOGRAPHIC INFORMATION SHOWN ON THIS PLAN IS BASED ON GIS &
LIDAR INFORMATION PROVIDED BY HARVEY POINT DEFENSE TESTING
ACTIVITY FACILITY. WET BASIN CONTOURS SHOWN & LABELED REPRESENT
AS —BUILT CONDITIONS OF WET BASIN. AS —BUILT ELEVATIONS IN DATUM
NAVD '88.
6. PROPERTY IS LOCATED IN F.I.R.M. ZONE "SHADED X". F.I.R.M. ZONES
SUBJECT TO CHANGE BY F.E.M.A.
7. NO WORK IS PROPOSED IN USAGE JURISDICTIONAL WETLANDS.
8. PROJECT AREA: 23.65 ACRES (AS ESTABLISHED IN STORMWATER PERMIT
#SW77120608 AND HEREBY DELINEATED ON THIS PLAN). HIGH —DENSITY
DRAINAGE AREA =13.16 ACRES AND IS DELINEATED ON THE PLAN.
9. IMPERVIOUS COVERAGE (HIGH DENSITY DRAINAGE AREA):
EXISTING: 134,886 SF
PROP. ASPHALT PAVING: 3,280 SF
PROP. CONCRETE PADS: 500 SF
FUTURE:
TOTAL IMPERVIOUS COVERAGE: 134,886 SF (23.1%)
10. IMPERVIOUS COVERAGE (LOW DENSITY AREA):
EXISTING: 68,825 SF
PROP,
TOTAL IMPERVIOUS COVERAGE: 69,025 SF (15.0%)
11. TOTAL IMPERVIOUS COVERAGE (ENTIRE PROJECT, EXISTING, PROPOSED, &
FUTURE): 203,911 SF (19.8%)
LEGEND
PROPOSED ASPHALT PAVING
PROPOSED CONC PAD
WET BASIN AS —BUILT PERM POOL
s AS —BUILT WET BASIN CONTOUR
0.53'
0.40'
1, 98' 4. 76'
EL. 2.76
(TYP)
4.82' 2,10'
EL. 2.45
EL. 2.38
- 0.76'
EL. 1.70
EL. 2.97
WET BASIN CONTROL STRUCTURE
AS -BUILT (NTS)
0.52'
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Q
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STORM STRUCTURE COORDINATES
35
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N 867,050.67
E 2,785,825.18
36
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N 867,037.27
E 2,785,821.13
0 20' 40' 60' 100'
SCALE: 1 "=401_0"
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? REFER TO SHEET C-303 FOR COORDINATES
LIMITS OF LANDSCAPE OF STRUCTURES.
�� CONSTRUCTION NOTE ISLAND (TYP? NOTE
40 ^ �' 41 42 CONTOURS SHOWN ON THE REFER TO SHEET C-403 LIMITS OF,
12�t -_. GRADING AND DRAINAGE PLANS FOR SECTION B-B CONSTR"1CTION
_..,. _ _ THROUGH -
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PROPOSED
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�l ELEV.1.5 -
2" GALV. "7
PIPE PO
ELEV. 0.0
1 \—FOOTING
(4) 0.375" HOLES IN
BOTTOM OF 2" PIPE
NOTES FOR DRAINAGE
1. TRASH RACK -ALL MATERIAL SHALL BE GALVANIZED.
2. ALL FLANGES SHALL BE BOLTED (4 EA FLANGE) TO
WALL WITH WEDGE ANCHORS
14'
2' 5' 52'
A
30" WEIR
8"
n 1 I
� n (17Svv 71-2 4 (ono
LOCATION OF STORM
STRUCTURE COORDINATES
CENTER END OF CENTER OF
OF INLET ENDSECTION ENDWALL AT
AT OUTFALL OUTSIDE
FACE
STORM STRUCTURE
ELEV. 3.75 ELEV. 3.25 COORDINATES
;ELEV.2.5 REFER TO SHEET C-302 FOR
STRUCTURE LOCATION
O ENDWALL 23 ENDWALL
N 867,162.07 N 867, 203.21
ELEV. -0.75 E 2,786,568.09 E 2,786,595.20
O2 INLET 24 ENDWALL
N 867,178.05 N 867,191.88
E 2,786,515.20 E 2,786,591.77
O INLET 25 ENDWALL
N 867,126.14 N 867,279.80
E 2,786,471,28 E 2,786,618.33
,,—NO.4 AT 12"-,
O.C. (HORIz) a
0 INLET 26 ENDWALL
AT 12"
N 867,088.47 N 867,268.46
-;—NO.5
O.C. (VERT)
E 2,786,484.70 E 2,786,614.90
4"
No. 5 DOWELS �'
O INLET 27 ENDWALL
AT 12" O.C.
w N 857 67,1.39 N 867,402.12
a E 2, 786, 367.89 E 2,786,655.27
WALL >
O INLET n28 ENDWALL
(5) N0.4 N 867,221.23 N 867,347.16
O.C. (T&B)
(T&B) AT 12" E 2,786,363.35 E 2,786,638.67
O.C.
A PLAN FOOTING SECTION A -A O 7 ENDSECTION 29 ENDWALL
N 7 8 1 O N 867,427.48 86 ,0 2.2
CONCRETE BMP RETAINING WALL E 2,786,558.59 E 2,786,688.34
NO SCALE O8 INLET 30 ENDWALL
1T `V .UU _. ,. ',',' f BENCHMARK
z
" ' t , N 868,221.895
�
Cry �� i o E 2,786,779.472
_ _
ELEV 6 33
d.
F- LIMITS OF �--- s - -
°�
s CONSTRUCTION I `1N AIE .n..r,
N 867,026.66 N 867,415.20
E 2,786,541.81 E 2,786,665.42
9
1 W ENDWALL 3 ENDWALL
O O
____--PLANTING AREA N 866,990.68 N 867,024.51
QUANTITY
BOTANICAL NAME
COMMON NAME
SHALLOW WATER PLANTS
38
CLADIUM JAMAICENSE
SAWGRASS
48
JUNCUS EFFUSUS
SOFT RUSH
111
PANICUM', VIRGATUM
SWITCHGRASS
60
PELTANDRA VIRGINICA
ARROW ARUM
57
SAGITTARIA LATIFOLIA
DUCK POTATO
74
SAGITTARIA LANCIFOLIA
BULLTONGUE
96
S.CHOENOPLECTUS AMERICANUS
THREE -SQUARE BULRUSH
35
SCHQENOPLECTUS TABERNAEMONTANI
SOFTSTEM BULRUSH
SHRUBS
17
ARONIA ARBUTIFOLIA
RED CHOKEBERRY
11
CEPHALANTHUS OCCIDENTALIS
COMMON BUTTONBUSH
15
CLETHRA ALNIFOLIA
SWEET PEPPERBUSH
10
LLEX GLABRA
INKBERRY
31
LTEA VIRGINICA
VIRGINIA SWEETSPIRE
17
VIBURNUM DENTATUM
VIBURNUM ARROWWOOD
E
2,786,557.40
E
2,786,153.34
1Q
ENDWALL
32
ENDWALL
N
867,067.93
N
866,999.89
E
2,786,274.28
E
2,786,162.74
11
INLET
33
ENDWALL
N
867,058.64
N
866,984.58
E
2,786,337.68
E
2,786,043.85
12
INLET
34
ENDWALL
N
867,018.86
N
866,971.18
E
2,786,341.96
E
2,786,039.80
13
ENDWALL
37
INLET
N
867,318.20
N
866,735.40
E
2,786,615.28
E
2,786,715.66
14
INLET
38
ENDWALL
N
867,334.36
N
866,732.42
E
2,786,561.83
E
2,786,700.54
PLANTING NOTES 15 INLET 39 ENDWALL
1. ANT GROWTH . ON THE;--10' SHELF PROVIDE 6" OF TOPSOIL. N 867,261.61 N 866,719.28
E 2,786,539.84 E 2,786,674.84
2. MINIMUt PS T• t. V T I TIE S
-SHALLOW r1ATT�R. 1 -g ON CENTER MINIMUM 16 INLET 40 ENDWALL
-SHALLOW LAND: SHRUBS MINIMUM 4'-0" ON CENTER O O
N 867,414.44N 566,690.31
E 2,786,572.35 E 2,786,653.47
3. SHELF PLANTING MUST OCCUR DURING OPTIMUM PLANTING SEASON.
17 INLET 41 INLET
N 867,457.22 N 866,810.24
-G OT'fiAT'Eb''IfEL -2.0' E 2,786,539.86 E 2,786,738.57
•
IM T O O
Q� P SED E'N
BQTT _OF ' ONE 18 INLET 42 ENDWALL
.TQ F OLEEAW kTE�1~ Y�ELfviiA80' N 867,370.23 N 867,087.50
ry
SHI,F3T.:CEE iUT E 2,786,443.13 E 2,786,813.16
.°m' SE
B 4ftOMELEV .7.80` . 19 INLET 43 INLET
------------------------------ -- -- -- -
_O 7 O 7
_ - - --- ---__ -- ____ -- --- - - - -- N 86 ,300.07 N 86 ,084 7
1
-------------------------------------------------------------------- -- -------------------------- E 2,786,371.88 E 2,786,822.39
------- --._.--------- - ^-- -Y�--- -- CONCRETE BMIP
.�� RETAINING WALL 20 INLET 44 INLET
(SEE DETAIL N 867,271.54 N 867,356.58
L THIS SHEET) E 2,786,349.92 E 2,786,904.75
�q S NT .:;STQAGE 21 ENDWALL 46 ENDWALL
FOREBAY �F0 ( ')' N 867,126.63 N 868,217.46
RnTTnKA E 2,786,572.07 E 2,786,797.46
22 ENDWALL 47 ENDWALL
N 867,115.29 N 868,171.2+/-
E 2,786,568.64 E 2,786,775.0-/-
D: DISTANCE BETWEEN BOTTOM
OF SHELF AND BOTTOM OF POND 0 20' 40' 60' 100'
(EXCLUDES SEDIMENT) (FT) SCALE: 1"=40'-0"
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BC 6.90
TC 7.40
6.42 NOTES
BC 6.90
cn
1. TOP OF CURB (TC) ELEVATIONS AS SHOWN 2:
'4
i,
ARE ON THE BACK OF CURB. -,-I I' i",n T i i
2. CURB HEIGHT=0.50 FEET FROM TOP OF BID
T C 8.0 4. X >
BC 7.54 \7.06 TC 8.04 OPTION ASPHALT PAVEMENT TO TOP OF __j
7.0
7.80 6.94/ -LANDSCAPE C 7.5 4 CURB. <
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5.0
7.50
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6 N 867,549.139
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7 6 7 E I S T I N G E 2,786,952.025
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EXISTING \
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DRAINAGE AREAS
STRUCTURE
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DRAINAGE
AREA
(ACRES)
C
VALUE
Tic
(min)
ACCUM.
(DA)
2
0.22
0.46
10
-
3
0.17
0.50
8
-
4
0.36
0.55
8
-
5
0.24
0.55
6
-
6
0.13
0.50
6
-
8
0.14
0.35
5
-
9
1.68
0.30
12.5
-
11
0.06
0.45
5
-
12
0.14
0.65
5
-
14
0.22
0.45
8
-
15
0.22
0.45
8
-
16
0.17
0.52
7
-
17
0.26
0.55
8
-
18
0.22
0.65
6
-
19
0.13
0.60
5
-
20
0.14
0.68
5
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22
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CONSTR, CONTR. NO.
SHEET 21 OF 429
C-306
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SHEET 38 OF 429
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