HomeMy WebLinkAboutWPO201700081 Plan - As-built 2021-09-30D_ D
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PROJECT SPONSOR
BROOKDALE PARTNERS LP
A T TN: MR. WILLIAM PARK
1821 AVON STREET, SUITE 200
CHARLOTTESVILLE, VIRGINIA 22902
PHONE: 434-979-2900
CHARLOTTESVILLE
1LyTFRSTgT�
PLAN SHEET INDEX
DATA
S T E D
64
SHEET NO.
DESCRIPTION
SURVEY SOURCE: HAMRICK ENGINEERING, P.C., 540-248-7407
1
TITLE SHEET
DATUM: NAVD 1988
�p
2
AS BUILT PLAN VIEW
BENCHMARK: CHISELED SQUARE
IN CURB AT N3890170.613 &
Ell475999.85
ON TAX PARCEL 76-1205G, ELEVATION 500.272
TAX MAP -PARCEL GNTq\NwOpp o=d
3
AS BUILT TOPGRAPHIC SURVEY AND SITE GRADING AND DRAINAGE
IMPERVIOUS COVER BREAKDOWN:
LAND USE:
SQ. FT.
ACRES
76-46C1 Z
4
AS BUILT PUBLIC STORM SEWER PROFILES
BUILDINGS:
37,769
0.87
CO(/NTRy J 5TH ST'
5
AS BUILT DRAINAGE AREA MAP
GREEN RD.
SIDEWALKS:
6,970
0.16
ASPHALT PARKING PAVING
74,923
1.72
TOTAL IMPERVIOUS AREA:
119,662
2.75
0' 1000, 2000' 3000'
VICINITY MAP
SCALE: 1" = 1,000'
PROJECT
LEGEND
ABBREVIATIONS
SYMBOLS
5 yy—
PROPOSED WATER LINE
W/ SIZE REFERENCE
CC
CG
CENTER TO CENTER
CURB & GUTTER
.
8S—
PROPOSE SEWERREFERENLINE
W/ SIZE
CENTERLINE
IENGINEERING,P
—may--
EXISTING WATER LINE
W SIZE REFERENCE
CMP
CORRUGATED METAL PIPE
CONC.
CONCRETE
STORMWATER MANAGEMENT FACILITIES CERTIFICATION
--8--
EXISTING SEWER LINE
DIP
DUCTILE IRON PIPE
W/ SIZE REFERENCE
C
IL
DELTA
- — _ - -
EXISTING CONTOURS
1H
ESMT
EASEMENT
Land PlQGb3lDlling * Public Works *Environmental
43
PROPOSED CONTOURS
ELEV.
ELEVATION
PURSUANT TO 9VAC25-870-55 I HEREBY CERTIFY THAT TO THE BEST OF MY
SANITARY MANHOLE
EX.
EXISTING
]Brasfl W.
HiamTrkk,
1�EXISTING
Jr., F.E.
KNOWLEDGE AND BELIEF, THE STORMWATER MANAGEMENT FACILITIES SHOWN
�
PROPOSED SANITARY MANHOLE
F.H.
FIRE HYDRANT
ON THESE RECORD DRAWINGS, HAVE BEEN CONSTRUCTED IN ACCORDANCE
156Laurel HMRoad
WITH THE APPROVED PLANS AND SPECIFICATIONS.Route
EXISTING DRAINAGE STRUCTURE
GR
GROUND SHOT
612 East
INVERT
Verona, VA �82 bwheng�-�®n� ¢
T
PROPOSED DRAINAGE STRUCTURE
L
L
LENGTH
BRASIL W. HAMRICK, JR.
--__—__—_—__
EXISTING STORM SEWER
MH
MANHOLE
NAME SIGNATURE
PROPOSED STORM SEWER
N/F
NOW OR FORMERLY
-
FENCE LINE
O.C.
ON CENTER
19318 AUGUST 25, 2021
R
PROPERTY LINE
VIRGINIA LICENSE DATE
03,3
UTILITY POLE
PVMT.
PAVEMENT
GUY WIRE
EP
EDGE OF PAVEMENT
"CERTIFY" MEANS TO STATE OR DECLARE A PROFESSIONAL OPINION BASED ON
R
RADIUS
SUFFICIENT AND APPROPRIATE ONSITE INSPECTIONS, MATERIAL TESTS, AS —BUILT
OVERHEAD UTILITY LINE
RCP
REINFORCED CONCRETE PIPE
SURVEY DATA, AND INFORMATION PROVIDED BY OTHER PROFESSIONAL AND
U-T
UNDERGROUND TELEPHONE
R.D.
ROOF DRAIN
THE CONTRACTOR, CONDUCTED DURING OR AFTER CONSTRUCTION.
"G
EXISTING POWER UNDERGROUND
R/W
RIGHT OF WAY
SAN
SANITARY
❑
TELEPHONE PEDESTAL
WM
WATER MAIN
EG
EXISTING GAS
TBM
TEMPORARY BENCH MARK
F/C
FACE OF CURB
6SL�
W� SIZE REFERENCE POSED SEWER LATERAL
T/C
TOP OF CURB
2 3fS�
yPROPOSED
REFERENCETERAL
SIZET/S
T/P
TOP OF PAVEMENT
TOP OF SIDEWALK
EXISTING FIRE HYDRANT
T/G
TOP OF GROUND
PROPOSED FIRE HYDRANT
W/
WITH
C.O.
SAN. SEW. CLEAN OUT
EXISTING CURB & GUTTER
IPF
IRON PIN FOUND
PROPOSED CURB & GUTTER
IPS
IRON PIN SET
S/W
SIDEWALK
AL Ak
REVERSE CURB & GUTTER
NOTE: NOT ALL LEGEND ITEMS
MAY APPEAR
IN THESE PLANS
NLT H off~
o G
U� BRASI 1.. HMCK, Jr.
LICENSE No.
PLOT DATE.• 09125121
✓OB No. 17-0192 SHEET 1 OF 5
W
CURVE DATA (� lu /A•
NO. R 0 ARC TAN CHORD 1,J Z 20 X15'ALBEMARLE COUNTY /
I J SERVICE AUTHORITY
Cl 525.00' 13'00 25" 119. 18' 59.85' S32'05'51 "W 1 18.93' WATER LINE EASEMENT
C2 360.00' 20'43 21 " 130.20' 65.82' S3557'19 "W 129.49' DB.5278,P.49 (??) C3 400.00' 26'04'32" 182.04' 92.63' 55921'15"W 180.47'
C4 260.00' 22'09'54" 100.58' 50.93' 583'2828"W 99.96' AD
C5 590.00' 11'46'33 1 121.26' 60.84' N79'33'18"W 121.05' OUNROAD l �ST"gTE- ,007E
C6 260. 00' 662547" '124. 64' 183.33' S84'3643 E 306.76' jug„ WAS INE T* — 777
C71 25.00' 1 90'00'00" 1 39.27' 1 25.00' 1 56'23'50'E 35.36'
� 8
sq/=Y S
(2) D8.5156, P.312
VARIABLE WIDTH
VEPCO EASEMENT
STORM
INLET —
" STORM SE
15' DRAINAGE
EASEMENT (9) —
DB.570, P.286
20' DRAINAGE
EASEMENT (1)
DB. 5047, P. 168
TO OLD LYNCHBURG RD_y
(STATE ROUTE 760)
ST❑RMWATER MANAGEMENT
GE❑-C❑❑RDINATES
LATITUDE 38,0069 N
L❑NGITUDE 78.5226 W
IPF IRON PIN FOUND
IRON PIN SET
UTILITY POLE AND GUY ANCHOR
• MANHOLE AND SANITARY SEWER
DROP INLET AND STORM SEWER
FIRE HYDRANT. VALVE AND WATER LINE
FSL FIRE SERVICE LINE
FDC FIRE DEPARTMENT CONNECTION
2"WS 2" WATER SERVICE
6'SL SANITARY SEWER LATERAL
UGE UNDERGROUND ELECTRIC LINES
FACILITY
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JOB No. 17-0182
SCALE 1" = 40'
DATE 03/10/2021
REVISION DATES:
SHEET No.
2OF51
PLOT DATE: 08/25/21
I
I II
II °Il SOUTHERN RIDGE DRIVE
/ s �
;?�
/ / 2R illy EXISTING CULVERT 12" CMP
I I� SPEED LIMIT INV IN = 519.99
II INV OUT = 518.57
SIGN, 30 MPH,/
0 \
I I °
hryti ' I �
AS -BUILT ELEVATION (TYP)
I I I DETENTION CONTROL STR-
NO8.76'
SIN PARKING _ I I I SEE DETAIL THIS SHEET TOP ELEVATION = 462.01' 462.05'
I 100YR WSE = 460.96' 20' EMERGENCY SPILLWAY
I I
ELEVATION = 460.51' 60.49'
I o
I v
EXISTING 18" I I I N 1OYR WSE = 459.32
RCP STORM
�u
SEWER �.
IN=517.16
INV
I 2YR WSE = 457.57
IIN I I I I I 43 L.F. 30"
IIIII I / r BOTTOM ELEV. = 450.00ADS N-12 04.0
'
I II IN I I I TRENCH
III11 dl�1--- 4
IIIII I�
I In I I
Illhl I I
II I I 1
CONSTRUCTED CUTOFF
TRENCH W/ 1:1 SIDE
SLOPES
INV IN = 447.68
TO STR NO. 20
I0 ° TYPICAL EMBANKMENT SECTION
N Il�uj I x NOT -TO -SCALE NOT TO SCALE
DETAIL OF STORMWATER MANAGEMENT BASIN
I N I II
_-518
_ -
III I I Z------- _
516
EXISTING DI-3 514 -
CURB INLET I I I\ /1 I I1 -
�I�-512-
,/ 510
508 _
1
C / \
EXISTING B1 3 p� I r e es
CURB/INLET 9 1 / ST / e'er- ► / \
�8ae'Es ^ ) 8 /
COTTAGE -�- I 9 /i I y°� o /'C
GREEN WAY ilij ,' ' 1 I 8"W J \ N
(RT. 879) II NVA I \\
eEW_ I / sa \ \
r N� T \ \
EXIST] G DI-3 ��i o� /� I i/ , -T-50] -
CURB INLET
o I�� M /I I I " MP
II II :1) I I CVUgw BP EME
I I�\ I I ;/ ONE STO HE1G E`
37
T G)
ilk
493• / \
I S10 _ \J /\
O
cC
7ti �0,
A sgs'
Lcs
49.51'
_
E
V-449.53 _
CL 30' ORIFICE
INV=456.60
456.58'
OO
Gj h5 Dc 6ro
48" PYRAMID TRASH RACK
30.00" ORIFICE -
OPENING
INV. = 456.60'
56.58'
49.55'
BOTTOM OF POND = 450.00'
PLAN VIEW
5.0'
449.5 I ,
6.00" ORIFICE
OPENING
INV. = 449.53'
q
P TF-ALL
TnP FI FV = 459.51' 459.49'
STD. MH BASE
�30" OUTFALL PIPE
INV. = 449.43'
449.40'
CONTROL STRUCTURE (STR NO. 26)
PRIVATE RUN CONFIRMED
IN PLACE W/ MATERIAL &
DIAMETER IN COMPLIANCE
PUBLIC RUN CONFIRMED
IN PLACE WITHIN EASEMENT
MATERIAL & DIAMETER IN
COMPLIANCE. SEE SHEET 4
PROFILE.
PRIVATE RUN CONFIRMED
IN PLACE W/ MATERIAL &
DIAMETER IN COMPLIANCE
PUBLIC RUN CONFIRMED
IN PLACE WITHIN EASEMENT
MATERIAL & DIAMETER IN
COMPLIANCE. SEE SHEET 4
PROFILE.
PRIVATE RUN CONFIRMED
IN PLACE W/ MATERIAL &
DIAMETER IN COMPLIANCE
REVISED PER PLAN NOTES
SEE SHEET 4 FOR PROFILE.
STORM
SEWER PIPES
STR
PIPE RUN DESCRIPTION
FROM
TO
1
2
197 L.F. 15" ADS N-12 0 2.97%
2
3
168 L.F. 15" ADS N-12 ® 1.46%
3
4
167 L.F. 15" ADS N-12 ® 2.33%
4
5
172 L.F. 15" ADS N-12 ® 2.38%
5
6
54 L.F. 15" ADS N-12 0 3.91%
6
7
47 L.F. 15" ADS N-12 ® 23.94%
8
9
5 L.F. 18" ADS N-12 0 5.00%
9
10
117 L.F. 18" ADS N-12 0 8.11%
10
11
79 L.F. 18" ADS N-12 0 7.65%
12
TEE
55 L.F. 15" ADS N-12 ® 0.50%
13
TEE
51 L.F. 15" ADS N-12 0 1.00%
14
4
57 L.F. 15" ADS N-12 ® 0.51%
15
5
57 L.F. 15" ADS N-12 0 1.30%
17
16
108 L.F. 15" ADS N-12 ® 2.00%
16
6
1 50 L.F. 15" ADS N-12 ® 2.00%
EX.
18
81 L.F. 30" ADS N-12 0 11.27%
18
19
143 L.F. 30" ADS N-12 ® 7.83%
19
20
85 L.F. 30" ADS N-12 0 8.03%
20
21
49 L.F. 42" ADS N-12 0 1.29%
22
23
19 L.F. 15" ADS N-12 ® 1.00%
23
24
77 L.F. 15" ADS N-12 ® 1.00%
24
20
31 L.F. 15" ADS N-12 ® 2.50%
STORM SEWER STRUCTURES
STR
INVERTS
NO
TYPE
TOP
IN OUT
1
C.F. CB-74
CURB GRATE
N/A
497.09
503.85
2
C.F CB-74
CURB GRATE
491.24
489.45
495.16
3
C F CB-74
CURB GRATE
487.00
486.90
491.52
4
C F CB-74
CURB GRATE
483.01 FM 3
484.87 FM 14)
482.91
488.12
5
C.F. CB-74
CURB GRATE
478.81 FM 4
478.81 FM 1
478.71
482.73
6
C F CB-74
CURB GRATE
476.60 FM 5)
470.29 FM 16
461.25
480.52
7
ES-2
N/A
450.00
N/A
8
DI-7
N/A
504.21
507.25
9
C.F. CB-74
CURB GRATE
503.96
501.80
508.59
10
MH-1
492.31(6" RD)
492. 1
492.21
500.50
11
ES-2
N/A
486.17
N/A
12
C F CB-74
CURB GRATE
N/A
496.72
499.20
13
C.F. CB-74
CURB GRATE
N/A
489.33
492.97
14
C.F. CB-74
CURB GRATE
N A
/
485.16
487.50
15
CURBCGRATE
N/A
479.55
483.47
16
C.F. CB-74
CURB GRATE
471.39
471.29
478.13
17
CURBCGRATE
N/A
473.55
477.47
18
DI-7
465.91
465.81
469.25
19
MH-1
454.61
454.51
465.00
DI-7
4471620 8 8 FM 19
4476FM 26
447.58
457.25
21
MH-1
446.95(FM 20)
446.85
457.50
22
C F CB-74
CURB GRATE
453.19(6" RD)
453.04
456.29
23
CURBCGRATE
452.85
452.75
457.02
24
MH-1
451.98
450.75
463.00
26
STORMWATER BASIN CONTROL STR.(SEE SHEET 9 & 20)
of �.% 4" \ \ sSC 0000 \ \\ � \ ADO
o '
G�% .
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RIP RAP OUTLET II Z \ I oo n �1 I / \ \ r
1 1 EXISTING STORM INLET \mom
/ I I I I p c' TOP = 488.24
INV OUT -
N
EXISTING 12" °__ 1 Uo 1 \ { n \\ \\\\\
I I \ \ \ kan \
RCP CULVERT II / I I I a I I I 1 T Z ST / /\ -
503.40 / I I I ° I\ 2 \ c \ w
INV IN= 517.30 l - O \ \ / ➢ 0
INV OUT= w I\ / -1 ° s \\ 0
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498 _ a -� \ -
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EXISTING 12 I \ \ \ I I N 11 / \ \ \ \ G O �Gi 2S \ \ - - 472
CMP CULVERT III I I 1 1 I 1 \ - 496 _T�-i / - - �C } /\ s
INV IN= 500.96 1 / 1 1 I , T _ /_ - - - o
INV OUT= l \\� 49 _ �� ice/ �l �� � \ 478 , ♦ \
-. (�
/ 492
4a0 �1
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W/ TOP = 465.25 & INV TO FIT EXISTING LINE
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UNIT APT gU1LDIN ❑ -� J //6' / INv= g�ILD1NG 300 ,.� ♦ II I 458
486.71 s1oRY, 2$ _ / ////// / / ��/ ��k/ �����\\\\�\\\ • SCALE 1" _
N7 : 35 30'
3/4 _SPLIT UILDING HEIG 36 /
FRONT 8 EL > 490. 1 /
sTR \ \ \ \ / I �� DATE 03 10 2021
147.01 1Nv _ /i�/ �� / �� �11� ohs 7 S6 i -
RpOM / -
FIRE SPRINKLER ER EL = 480.61 1472.50/ / / / / / gp51NCV�t1 460 III o I ( Jam_ _\
I ■■ ' I 1 _+ REVISION DATES:
_ --
_ - 1- -„ g INV OUT=445.72 `
450 \\ SEWTU
ER
4I I s �r-I-1I EXISTING INLE
T
TOP=454.32INV
6RO 478.61 THROAT INV=45
2.64
60 INV N=446.02FNNV OUT=445.92477-462D
�6 WIDE DV4T
10UBLE
- SWING GATE \ STR 1
��-�7� _ -- ------ --- INV=455.50-�` ��
\ ` C 470 - - C6] - _ �� �- STORMWATER MANAGEMENT FACIDTr €ASEMENT - - \ - 462 \s I I
464 \ \\o
\ \ INV=465.50 \ ` 47 468 466 \ \ 1 I II
EXI-STI-NG -UT-ILI-P
LINE _OLES^
\\ 4
EXISTING RHEAD UTILITY �-O'I
IrB° UTILITY
POLE
�� \ �' __7 II \1 I m o II
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35 L.F. 15" ADS N-12 STORM SEWER
FROM STR 24 TO STR 20 ® 2.00%.
RUN FROM STR 24 TO STR 25 PLUGED. I I
INV OUT AT STR 24 = 450.75 I J I
INV IN AT STR 20 = 450.05 I o I
I o I
1 I
1 I
UTILITY
POLE
SHEET No.
3OF5
PLOT DATE: 08/25/21
1A
00
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520 520 550 550
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440 440 470 470 W
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430 430 460 460 a
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420 420 450 450
1+00 1+50 2+00 2+50 1+00 1+50 2+00 2+50 3+00 3+50
STORM SEWER PROFILE STORM SEWER PROFILE
STRUCTURES NO. 22 THRU 20 STRUCTURES NO. 8 THRU 11 w
SCALE: HORIZONTAL: 1 "-30', VERTICAL: 1 "=10' SCALE: HORIZONTAL: 1 "=30', VERTICAL: 1 "=10' J
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510 510
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470 470 0 CQ
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460 460 W a
450 450------------
440 440 JOB No. 17-0182
SCALE 1" = 30'
DATE 03/10/2021
430 430
REVISION DATES:
420 420
1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 5+50 6+00
STORM SEWER PROFILE
STRUCTURES NO.18 THRU 21
SCALE: HORIZONTAL: 1 "=30', VERTICAL: 1 "=10'
SHEET No.
4 OF 5
PLOT DATE: 08/25/2021
(TYP)
STR 24
STR 23 STR 22
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GRADE
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LF 15" ADS
N-12 ® 1.
35 LF
N-12
1
®2.00%
HG
(TYP)
19 L
15" ADS
N-1
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PROPOSED
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GRADE
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Virginia Runoff Reduction Method Workshest
DEQ Virginia Runoff Reduction Method New Development Compliance Spreadsheet - Version 3.0
BMP Design specifications List: 2013 Draft Stds 8, Specs
Site Summary
Total Rainfall = 43 inches
Site Land Cover Summary
Site Tv and Land Cover Nutrient Loads
Z
Totat TP Load Reduction Required (lb/yr) 5.31 O
Site Compliance Summary W_
U
Cn
W
Summary Prim �
Z
w
w
Q
0
� ac
Virginia Runoff Reduction Method Worksheet ( l h p
Virginia Runoff Reduction Method Worksheet Virginia Runoff Reduction Method Worksheet N
o>
CD
Drainage Area A Summary
Land Cover Summary
w O U
z
Runoff Volume and CN Calculations z � x
Drainage Area Summary
5.76 1-yearstorm 2-year storm 10.year storm a
Target Rainfall Event (in) 3.05 3.69 5.58 e ti
BMP Selections t � -0
LJ
Y
N
ti W d
(� N
Fri �
Drainage Area Compliance Summary i; lI Z o
a>
Q
W
< Z
W � r_1
Summary Prim Summary Print Summary Prim Q
z O Z
I- W
0 CO W
Wg
OFFSITE
8.64 ACRES
OFFSITE � � � Z
2.42 ACRES ( _
--- m ter= \� 't \� ,I F- >-
e 4 \ �� `� I / - .eo A \ r^
d�
I z
OFFSITE l��a , \ ( I /' / - IAND/ORW �
4.40 ACRES '` $ ( j \ \ i J O
I PS = PRINCIPAL SPILLWAY _J U
\� I W
�' STORMWATER BASIN I O J
W
i ryC \ j
b /
Hydrograph Summary Report papa t m
+Z _ �� / - goo Q'Snyc a eui�/ / l/ / �sr /, / ,z� /
7� / °
\ \\ \! �/ / / y� b
Ar�' ' JOB No. 17-0182
gCRFS ® , / / / --+a SCALE 1" = 60'
d
A \ \ I
+� �/ `y _ i�, / ,' '/ DATE 03/10/2021
REVISION DATES:
p71 -ago
2.98 ACRES
402 ■oar
'°• pper�/ \ � \' \ � � - _ _ .e.
\ \ \ \ \ ®, PRE -DEVELOPED TC PATH
r \
_ - -
/ POST -DEVELOPED TC PATH
\ \ \ \ sag �y
--- - SHEET No.
SOPS
PLOT DATE: 08/25/21
Time of ConceMratlon
Misting Conditions
Flooding
STORMWATER MANAGEMENT CALCULATIONS
65 LF sheet flow over woods &grass at C.0.20 w/ 4.62%slope, TC=13.25 min
1180 LF ditch flow w/ H=63.15', TC�.O min
DESIGN NARRATIVE
Pro/ect Location, Description &Justification
Hydrographs 13, 14 and 15 represent the off -site runoff for the2, 10 and 100-year, 24
Drainage Area
Total TC=13.25+ 6.0 = 19.25 min (use 19.0 min)
hour storm events. Hydrographs 16, 17 and 18 combine hydrographs 9, 10 and 11 with
Total on -site area = 5.76 acres
Proposed Condition to Detention Pond
The subject property is located between the south side of Country Green Road and the
13, 14, and 15 to establish the total 2, 10 and 100-year runoff directed to the
stormwater facility. Hydrographs 19, 20 and 21 routes the total 2, 10 and 100-year
Total on -site area to detention basin = 5.00 acres
north side of Mountainwood Road. Access to the property is via Country Green Road
events through the basin determining the basin size and ouffall structures are
Total on -site area released uncontrolled = 0.76 acres
22 LF sheet flow over grass at C=0.20 w/ 12.50%slope, TC.6.80 min
209 LF pipe flow w/ H=18.0a', TC = 1.25 min x 0.20 = 0.25 min
and Mountainwood Road. The total acreage of the project is 5.756 acres. The property
is bound by a planned residential development to the west side and a vacant residential
adequately sized to control the flooding hydrographs within the basin and that all down
p�/p/tat/on Data for 24-hour Storms
857 LF ditch flow w/ H=36.7a', TC = 4.so min
property on the east side.
stream drainage components are adequate to pass the flooding events. The release
rate for the 2, 10, and 100-year post developed events are less than the historical pee
Total TC = 6.80 + 0.25 +4.90 =11.95 min (use 12.0 min)
The proposed site development consists of 96 apartment units contained within four
development rates.
1 year = 3.05 inches
2year = 3.69 inches
Proposed Condition for uncontrolled Area
buildings. The developed site also includes a community building, along with all of the
Quality
10yr = 5.58 inches
LF flow TC-7.8o
associated parking and utilities. To facilitate the project, Albemarle County issued a
100year = 9.16 inches
t 5 sheet over grass at C-o.20 w/ a.00%slope, min
zoning certification for 96 units on September 26, 2017.
3a5 LF pipe flow w/ H=t 7.16', TC = 2.2o min x o.20 = o.aa min
Offsite nutrient credits will be purchased to satisfy the 5.11 pounds of phosphorus per
Natural Resources and Existing Conditions
year that must be removed from the development.
Soil Hydrologic Groug
Total TC = 7.80 + 0.44 = 8.24 min (use 8.0 min)
DA A
DAB
DA C
D.A. D
DA E
Total
Forest/Open (acres)
O.lx)
0.00
0.110
O.lx)
0.00
O.lx)
Managed Turf (acres)
3.01
0.00
0.00
0.00
0.00
3.01
Impervious Cover (saes)
2.75
0.00
0.00
0.00
0.00
2.75
Total Area (acres)
5.78
0.00
0.00
0.00
D.A. A
DAB
DAL
D.A. D
DA E
Total
TP Load Reduced (Ib/yr)
0.00
0.00
O.lx)
D.00
0.00
0.00
TN load Reduced (Ib/yr)
0.00
0.00
0.00
0.00
0.00
0.00
A Soils
B50115
CSoils
DSolls
Total
%of Total
Forest/Open (acres(
0.00
0.00
0.00
D.00
0.00
0
Managed Turf (acres)
0.00
0.00
3.01
0.00
3.01
52
Impervious Cover (acres)
0.00
0.00
2.75
0.00
2.75
48
Managed Turf
Impervious Cover
TP Load from
Total Impervious Cover Treated (acres)
0.00
Total Turf Area Treated (acres)
0.00
Total TP Load Reduction Achieved in D.A.
0 00
(Ib/yr)
Total TN Load Reduction Achieved in D.A.
0 00
(Ib/yr)
A soils
BSoils
CSoils
DSolls
Totals
%Of Total
Forest/Open (acres)
0.00
0.00
0.00
0.00
0.00
0
Managed Turf (acres)
0.00
0.00
3.01
0.00
3.01
52
Impervious Cover (acres)
0.00
0.00
1.75
0.00
2.75
48
5.76
300
She Rv
0.57
Treatment Volume
11,887
TP Load (lb/Yr)
7.47
TN Load (lb/Yr)
53.43
Total Runoff Volume Reduction (fts)
0
Total TP Load Reduction Achieved (Ib/yr)
0.00
Total TN Load Reduction Achieved (Ib/yr)
0.00
Remaining Post Development TP Load
7 47
(Ib/yr)
Remaining TP Load Reduction (Ib/yr)
5.11
Required
Drainage Areas
RVaCN
Drainage AreaA
Dralnaga AreaB
Dnlinaga AreaC
Drainage AreaD
Drainage AreaE
CN
85
0
0
0
0
RR (ks)
D
0
0
0
0
1-year return period
PV w°RR (ws-in)
1.63
0.00
0.00
0.00
0.00
RVwRR (ws-In)
1.63
0.00
0.00
0.00
0.00
a adjusted
as
a
o
0
0
2-year return period
RV wo RR (ws-in)
2.18
0.00
0.00
0.00
O.oO
RVwRR IwYIn)
2.18
0.00
0.00
0.00
0.00
CN adjusted
85
0
0
0
0
10-year return period
RV wo RR (ws-In)
3.91
0.00
0.00
0.00
0.00
RVwRR (ws-in)
3.91
0.00
0.00
0.00
0.00
CN adjusted
85
0
0
0
0
SWM
BASIN
OPERATION
AND
MAINTENANCE
PLAN
MAINTENANCE TASK
FREQUENCY
GENERAL INSPECTION AND DEBRIS CLEANUP
ANNUAL OR AS NEEDED
CLEANOUT SEDIMENT
ONCE EVERY 3 TO 5 YEARS
REMOVE DEBRIS, BLOCKAGES &OBSTRUCTIONS FROM PS INFLOWS
AS NEEDED
REMOVE DEBRIS BLOCKAGES &OBSTRUCTIONS FROM PS OUTFLOWS
AS NEEDED
MOW EMBANKMENT GRASS, PERIMETER TURF &EMERGENCY SPILLWAY
AT LEAST 4 TIMES PER YEAR
REMOVE AND REPLANT DEAD LANDSCAPE MATERIAL, THIN AQUATIC OR
EMERGENT VEGETATION
ANNUAL OR AS NEEDED
RESEED REPAIR CONTRIBUTING DRAINAGE AREA, POND BOTTOM
& POND SLOPE TURF AREAS TO PREVENT EROSION
AS NEEDED
CLEAR DISCHARGE CHANNEL OF BRUSH OR WEEDS
ANNUAL OR AS NEEDED
Hyd.
No.
Ffydrogreph
type
(origin)
Peak
flow
(efa)
Time
interval
(min)
Time to
peYt
(min)
Volume
(etdt)
Radzm
period
(yre)
Inflow
hyd(a)
Maximum
slavatlon
(it)
Na:lmum
storage
(Dull)
Nydrogreph
description
1
SCS Runoff
27.8
6
726
112,706
2
---
--
---
2-yr conslmcl'wn
2
SCS Runoff
82.0
8
726
255,873
25
---
--
---
25-yr construction
3
Reservoir
25.9
8
732
112,705
2
1
480.15
57,687
2-yr construction
4
Reservoir
81.4
8
792
255,872
25
2
480.64
82,588
25-yr construction
5
SCS Runoff
4.8
6
728
18,428
1
---
--
---
1yr Pre
8
SCS Runoff
7.4
8
726
24,444
2
---
--
---
2yr Pre
7
SCS Runoff
18.7
8
720
52,013
10
---
--
---
1 Dyr Pre
8
SCS Runoff
11.5
1
721
29,048
1
---
--
---
1yr Post
9
SCS Runoff
12.1
8
720
97,141
2
---
--
---
2yr Past
10
SCS Runoff
21.5
8
720
88,483
10
---
--
---
1 Dyr Post
11
SCS Runoff
99.4
8
720
124,842
100
---
--
---
100yr Post
12
Rese