HomeMy WebLinkAboutC7.1 Pre-Development Watershed Plan (9.7.23)EXISTING CONTRIBUTORY AREA GROUNDCOVER CALCULATIONS
YARMOUTH,
SUBCATCHMENT
#
TOTAL
AREA (SF±)
GROUNDCOVER
TYPES
CURVE
NO.
SUB -AREA
BY TYPE (SF±)
WEIGHTED
CURVE NO.
1
100,376
WOODS, FAIR HSG A
36
74,376
26,000
38
WOODS GRASS COMB. FAIR HSG A
43
2
30,064
WOODS, FAIR, HSG A
36
25,064
5,000
37
WOODS/GRASS COMB., FAIR, HSG A
43
3
222,215
WOODS, FAIR, HSG A
36
169,215
53,000
38
WOODS/GRASS COMB., FAIR, HSG A
43
4
114,596
WOODS, FAIR, HSG A
36
90,596
24,000
37
WOODS GRASS COMB., FAIR HSG A
43
5
21,517
WOODS, FAIR, HSG A
36
17,017
4,500
37
WOODS/GRASS COMB., FAIR HSG A
43
6
22,962
WOODS, FAIR, HSG A
36
18,462
4,500
37
WOODS GRASS COMB. FAIR HSG A
43
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CONTRIBUTORY AREA LEGEND
1 I = EXISTING SUBCATCHMENT AREA
Al = EXISTING SUBCATCHMENT DISCHARGE / LOW POINT
- — — — — = TIME OF CONCENTRATION PATHWAY
= PRE -DEVELOPMENT CATCHMENTAREA BOUNDARY
Woods/Grass Combination, ,
Fair, HSG A '
Woods, Fair, HSG A
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
EXISTING CONTOUR
32 PROPOSED CONTOUR
X12.34 EXISTING SPOT GRADE
/ PO 24x5 PROPOSED SPOT GRADE
< — w— WATER SERVICE LINE
/�` —E— UNDERGROUND ELECTRIC SERVICE
�\ � TEST HOLE / BORING LOCATION
0
A` /\ ST SEPTIC TANK
/Q 7 "\0 DB DISTRIBUTION BOX
NQ / SAS SOIL ABSORPTION SYSTEM
Top Reserve RESERVED FOR FUTURE
. Mass Highway Bound Mass. Coord. System: Cob UTILITY POLE
.� N: 2720847.75
E: 1006864.30 ® CATCH BASIN
az Qa" NAVD88 Datum: 2D' FIRE HYDRANT
/ EL=53.4± ® DRAINAGE MANHOLE
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All,
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To- 0.21'
0 50 100 150
SCALE 1" = 50'
G:\AAJobs\THE DAVENPORT COMPANY -ROUTE 6A-YARMOUTHPORT\DWG\Definitive Site PIans.dwg
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N
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Top of Concrete Bound
Mass. Coord. System:
N: 2720127.39
E: 1007783.51
NAVD88 Datum:
EL=29.1±
---I(C B,
FND
C701
THE DAVENPORT COMPANIES
20 NORTH MAIN STREET, YARMOUTH, MA
PRE -DEVELOPMENT WATERSHED 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:
9/7/2023 As Noted RFR JMO JMO-8807