HomeMy WebLinkAboutC7.2 Pre-Development Watershed Plan (8.9.23)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
Top of Mass Highway Bound
Mass. Coord. System:
N: 2720847.75
E: 1006864.30
NAVD88 Datum:
E L=53.4±
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
24x5
PROPOSED SPOT GRADE
— w—
WATER SERVICE LINE
—E—
UNDERGROUND ELECTRIC SERVICE
IP
TEST HOLE / BORING LOCATION
ST
SEPTIC TANK
DB
DISTRIBUTION BOX
SAS
SOIL ABSORPTION SYSTEM
Reserve
RESERVED FOR FUTURE
Cob
UTILITY POLE
®
CATCH BASIN
`Cr
FIRE HYDRANT
0
DRAINAGE MANHOLE
_ s Back of Berm ---- ■ CONCRETE BOUND, FOUND
-- D(CLTOCL) _----- Paved —X—x— LIMIT OF WORK
—-40 .09' TO HOCKANO —�— — _ _ _ — _ pave FENCE
In -6A-
Back erm L_-- — G _ _ — T�__� GUARDRAILS
% 40' Wide- Sta e Highway) 35 • 6 6, — — _ / _ —� \ �^^^ ^J EDGE OF CLEARING
— _
— 43p
Ed e of Pavement — _ /� �_ _ �06 TO 0 _
— _ _
T
Back of B� — — — — — `� �� _ — — — 92.Op WARD R Edge o
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— I n N STREE
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(4U Town Way)
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N OF YARMOWgTER EASEMENT4 sSo
—
� ELECTRICAL EASEMENT ASEMENT
so' WIDE 1?o
• ��IN
-
-
1
_ 0
r e ad Wetland
te
Edge of Ve6 Wetlands Layer) `
1� (Per Mass GIS DEP
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All,
�#2936C
o -
-
To- 0.21'
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±
r
CB,
FND
C701
THE DAVENPORT COMPANIES
20 NORTH MAIN STREET, YARMOUTH, MA
PRE -DEVELOPMENT WATERSHED PLAN
LOT 2- ROUTE 6A- YARMOUTH-PORT, MA
J.M. OTEILLY & ASSOCIATES, INC.
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:
8/9/2023 As Noted RFR JMO JMO-8807