HomeMy WebLinkAboutC7 Stormwater Contributory Area Plan (6.6.23)PROPOSED CONTRIBUTORY AREA GROUNDCOVER CALCULATIONS
YARMOUTH,
SUBCATCHMENT
#
TOTAL
AREA (SF±)
GROUNDCOVER
TYPES
CURVE
NO.
SUB -AREA
BYTYPE (SF±)
WEIGHTED
CURVE NO.
M1 (RUNOFF
TO CATCH BASIN)
23,930
PAVED PARKING HSG A
98
6,286
15,144
2,500
54
>75% GRASS COVER GOOD HSG A
39
WOODS FAIR HSG A
36
M1 (RUNOFF
DIRECT TO SWALE)
7,973
>75% GRASS COVER GOOD HSG A
39
7,973
39
M2 (RUNOFF
(TO CATCH BASIN)
124,519
PAVED PARKING HSG A
98
33,633
48,641
42,245
54
>75% GRASS COVER GOOD HSG A
39
WOODS FAIR HSG A
36
M2 (RUNOFF
DIRECT TO SWALE)
53,147
PAVED PARKING HSG A
98
4,089
24,058
25,000
42
>75% GRASS COVER GOOD HSG A
39
WOODS FAIR HSG A
36
ROOF RUNOFF
(PER DWELLING)
1,288
ROOFS HSG A
98
1,288
98
S1
24,842
PAVED PARKING HSG A
98
5,997
18,845
53
>75% GRASS COVER, GOOD, HSG A
39
S2
9,726
>75% GRASS COVER GOOD HSG A
39
9,726
39
S3
74,637
PAVED PARKING HSG A
98
2,900
46,737
25,000
40
>75% GRASS COVER, GOOD, HSG A
39
WOODS, FAIR HSG A
36
S4
2,844
PAVED PARKING HSG A
98
791
2,053
55
>75% GRASS COVER, GOOD, HSG A
39
S5
21,393
PAVED PARKING HSG A
98
1,359
15,534
4,500
42
>75% GRASS COVER, GOOD, HSG A
39
WOODS, FAIR, HSG A
36
NON -RECHARGE
AREAS, TOTAL
160,100
PAVED PARKING HSG A
98
611
30,000
129,489
37
>75% GRASS COVER GOOD, HSG A
39
WOODS, FAIR, HSG A
36
Q2
Back of Berm
BaEd e om
ckof Bf -
40
--ONTRIBUTORY AREA LEGEND
- - - , - , - , -
= MAIN CONTRIBUTORY AREA BOUNDARIES
M1
= MAIN CONTRIBUTORY AREA
- - - - - - - - - -
= SECONDARY CONTRIBUTORY AREA BOUNDARIES
S1
= SECONDARY CONTRIBUTORY AREA
TIME OF CONCENTRATION PATHWAY
= PRE -DEVELOPMENT CONTRIBUTORY AREA BOUNDARY
M3 = DWELLING ROOFS
PO
NOT TO SCALE
PLAN BOOK 326 PAGE 22
ROUTE 6A 1895 S.H.L.O PLAN, SHEET 8
DEED BOOK 2776 PAGE 322
ASSESSORS' MAP 125 PARCEL 39
LEGEND
- - 32
EXISTING CONTOUR
32
PROPOSED CONTOUR
X12.34
EXISTING SPOT GRADE
24x5
PROPOSED SPOT GRADE
- w-
WATER SERVICE LINE
-�-
UNDERGROUND ELECTRIC SERVICE
TEST HOLE / BORING LOCATION
ST
SEPTIC TANK
DB
DISTRIBUTION BOX
�W Top of Mass Highway Bound SAS SOIL ABSORPTION SYSTEM
Mass. Coord. System: Reserve RESERVED FOR FUTURE
N:2720847.75
E: 1006864.30 � UTILITY POLE
NAVD88 Datum: ® CATCH BASIN
4z Qa" EL=53.4± 2c' FIRE HYDRANT
/ ® DRAINAGE MANHOLE
s BackofBerm ■ CONCRETE BOUND, FOUND
/ p --- ------ _ -X-X- LIMIT OF WORK
.-40 .09 TO HOCKANO D (CLTO CL) Paved
- -RO 'TT _ _ _ _ _ Drive FENCE
GG -� - _ \
�J� - - - - - \ _ ' - - s ----GUARDRAILS
--� (40' Wide- State Highway) - - - _ T'�,,, \
351. 6 H _ / ��\\ ^^^^ EDGE OF CLEARING
_ _ 430. UT
\ FAD/ / fl4X5 ^ 52- - 06' TO 0
- - - - - -1 / '� T _ L - - - - - _ .0 p, ` `WARD RE Edge o Pav
c _ - �_ j /7-�/ % J I ' 48�x5 ) / `��ACH(CL7-OCLement -
ed 5 5/ / / j �- oa
J //1 / � It Pull ff
O `� 60
/ ri ss
/I0 I'llSA ( 5600
+I M 1
LU
/ LU
J
LL
\
o
- �
\ I s w
1OXO
-
/ i yti
D
3
2 \ /
4 / JLLI
\ G (D
O
�° If
w
LL
LL
60 /�o
a
L ` p ♦ (y�o ��O /
Lu
34 \ QO S J LLn
4�1 LL
\ \ hto,
32
k M 2
� � ^ p � o i / � � ,, • „ � / / / � � � as
S3 pNo A
4 I o��, X I 1 I
I m / A/
0 I Ins \ I I I I
140
000
00
62
4� �o� /
SS / o /
58
`n OFLID �10
TOF EL_65
ELLING
-- ► _ -- I - / _ _ �� I 1 NSTREET
EIL(40' Town
- � / �-- � � \ � / �� / / EEWay)
- / I / \ \ / / I I
72
�-
1
I I
1 b
TOWN OF Y � s8 s s4 s2 s
ry ARMOUo
TH WgTER EASEMENT
� ELECTRICAL E
ZASEMENT
so' WIDE 1?o
• ��IN
-
1
_ /
/ r d Wetland
Edge of vegetate Wetlands Layer)) `
/ / 1� (Per Mass GIS DEP
/ `
♦
II, dl,
�#2936C
o -
-
00 -
200.21'
0 50 100 150
SCALE 1" = 50'
G:\AAJobs\THE DAVENPORT COMPANY -ROUTE 6A-YARMOUTHPORT\DWG\Definitive Site PIans.dwg
w
00
�o
N
IW
Top of Concrete Bound
Mass. Coord. System:
N: 2720127.39
E: 1007783.51
NAVD88 Datum:
EL=29.1±
C B,
FND
THE DAVENPORT COMPANIES
20 NORTH MAIN STREET, YARMOUTH, MA
EXISTING STORMWATER CONTRIB. AREA PLAN
LOT 2- ROUTE 6A- YARMOUTH-PORT, MA
o� �� J.M. OTEILLY & ASSOCIATES, INC.
�OQ�� Professional Engineering & Land Surveying Services
1573 Main Street - Route 6A
P.O. Box 1773
(508)896-6601 Office Brewster, MA 02631 (508)896-6602 Fax
DATE: SCALE: BY: CHECK: JOB NUMBER:
5/6/2023 As Noted RFR JMO JMO-8807