HomeMy WebLinkAbout16 East Main Street Site Plan 295'1 HEAVY DUTY H-20 F&O'S
15 2' TYPICAL PAVEMEN! CP.OSS SECTION
CONNECT CATCH BASINS Z. BINOER 1" D --
WITH LEACHING TRENCH FMSH GRADE ON 12" COMPACSD GRAVEL
13.5 M1.03.1 YPE B
SLOTTED`: COMPACT SUBGRADE
H-20 12"6 HDPE H-20 PRECAST
AT 09. DRILL (2) 1"0 RISERS 2.7'
HOLES TYP. MORTAR ALL
LO :.•.'i
A COMPONENTS
TO INV. FULL
EXIS . EL. 10.5 MORTAR
BASIN 1 BED (k
2' ADJUSTING
BLOCKS
. IF REQ.)
C61 \\\\\\\\ C.B. TRAP CB2
1000 GALLON PRECAST 12"fl DPE PIP 1000 GALLON PRECAST
H-20 CATCH BASIN ELBOW H-20 CATCH BASIN
6.0X 6'-8" 3•X2'TRENCH 6'0X 6'-8"
SHOREY OR EQUAL BETWEEN BASINS SHOREY OR EQUAL
SEE CROSS SECTION
BELOW
PLATE
MIRAFI 140NS
FABRIC OVER
37 PEASTONE OVER PIPE
\\ CONNECTING SLOTTED 12'0
CORRUGATED H-20 HDPE PIPE
21 _.75'-1.S DOUBLE
' WASHED STONE
�3
I
TRENCH CROSS SECTION A -A
NTS
DETAIL SECTIONS:
NTS
DRAINAGE CALCULATIONS:
DRAINAGE AREA - 31,006 SF, 25 YR STORM
RATIONAL METHOD O=CIA = 0.83(4.25 (31006/43560)(448.8)=1126 GPM
1126 GPM/O.7GPM/SF=1609 SF REQUI ED
USE 112' OF 3'X2' LEACHING TRENCH IN ADDITION TO (2) EXIST. BASINS
1620 SF> 1609 SF O.K.
2r/3h LT-
DATE
r3 yL-
DATE
File name: CADRAWING\98-244\98-244.DWG
ASSESSORS MAP 30 PCL C1
PLAN REF. PB 341 PG 24
DB 6477 PG 138
ZONING DISTRICT: B2
SETBACKS: 30' FRONT, 25' SIDE, 20' REAR
MAX BUILDING COVERAGE 25%
GROUNDWATER OVERLAY DISTRICT: NOT IN APD OR ZOC
EXISTING IMPERVIOUS COVERAGE: 85%
PROPOSED IMPERVIOUS COVERAGE: 85%
FLOODZONE: C & B (YAR. PANEL 5)
EXISTING USE: CONVENIENCE STORE/SELF SERVE GAS STATION
PROPOSED USE: CONVENIENCE STORE/SELF SERVE GAS STATION
H-3 = FOOD STORE
H-7 = SELF SERVICE GAS STATION
Off 508-362-4541
fax 508 362-9880
1
down cape engineering, inc.
CIVIL ENGINEERS
LAND SURVEYORS
939 main st. yarmouth, ma 02675