HomeMy WebLinkAbout812 Route 28 Plan of LandDesign Calculations — STORMWATER DRAIN FOR LAWN
Surface Area of LAWN :2500 sq. ft
25 YEAR STORM DESIGN FLOW
PERCOLATION RATE — 2 Minutes per inch
STORM WATER ABSORPTION AREA: Using percolation rate of2 min./Inch
Bottom Area: 2 gal/sq• ft. x 44 sq. ft. = 88 gallons
Sidewall Area: 2 gal./sq. ft. x 10 sq. ft. = 20 gallons
Providing: = 108 gallons in 2 Min
Providing: = 3240 gallons in 1 Hour
25 YEAR STORM DESIGN FLOW = 4,675 GAL in 24 HOURS/2500 SQ FT LAVA
Use: (2) PRECAST 2.5 OIAM. DRYWELL HAVING A 4' EFFECTIVE DEPTH,
TO BE USED WITH 2' OF WASHED STONE ALL AROUND
PRIVATE DWELLING
Existing 14" Soil Berm
TERMITE OF CAPE COD
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SCALE: 1"=20'
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TYPICAL DRY WELL FOR DOWN SPOUTS
2'-6' DIA
M wsPECTM OVER
Holts:
1. CONCRETE: 4,000 PA MMUM AFTER 26 CATS.
2. CAPACITY INCREASES M N:RE lOM OF 160 GAU-ONS
FOR EVERY Y SECTION ADDED.
& BOnOM PLATES AVANASUE.
4. ALSO AVAMNLE M RE PiELE.
I4' DIA MET
O O 3.25'
I O O
1 HOLES 4' TD 1 1/2' M TAPER
SECnDN VIEW
CONSTRUCTION NOTES
1. LAWN AREA FROM END OF SEPTIC TANK TO SOUTHWEST CORNER OF LOT
AND TO SOUTHEAST CORNER OF LOT TO BE EXCAVATED AND ASPHALT
FROM FORMER PARKING LOT TO BE REMOVED.
2. GRADE IN THIS AREA TO BE LOWERED TO ELEVATION 99.50
LOAM, SEED AND LANDSCAPE PLANTINGS TO BE REPLANTED.
3. DRAINAGE BASIN AND BUBBLER TYPE GRATE TO BE INSTALLED IN
SOUTHWEST CORNER OFi"PROPERTY AT ELEVATION 99.00
TO ENSURE THAT WATER WILL BE COLLECTED ON SITE FROM LOWERED GRADE
4. 12" LOCK AND BLOCK RETAINING WALL TO BE CONSTRUCTED ALONG
PERIMETER OF BUILDING WHERE GRADE IS LOWERED TO MAINTAIN GRAVEL
AROUND BUILDING
5. 12" LOCK AND BLOCK RETAINING WALL TO BE CONSTRUCTED ALONG
WEST LOT LINE TO RETAIN REMAINING GRADE TO ENSURE WATER RUNOFF
WILL NOT IMPACT ABUTTER —TERMITE OF CAPE COD
6. Contractor is responsible for Digsafe notification, VFRIRCATION
and protection of all underground utilities and pipes.
PLAN REF.:
NOTE:
THE PROPERTY LINES ARE APPROXIMATE AND
ARE COMPILED FROM A SURVEYED PLAN BY EAGLE SURVEYING, INC.
ENTITLED "PLOT PLAN IN YARMOUTH, MA OF #812 ROUTE 28,
DATED — MARCH 15, 2007
AND IS NOT INTENDED TO BE A SURVEY PLOT PLAN
IT SHOULD BE USED FOR NO PURPOSE OTHER THAN
THE TOPOGRAPHY MODIFICATION AND DRY WELL INSTALLATION.
LEGEND
104X1
DENOTES PROPOSED
SPOT GRADE
DENOTES EXISTING
X 104.46
SPOT GRADE
PL
PROPERTY LINE
PROPOSED CONTOUR
97-----97
EXISTING CONTOUR
DEEP TEST HOLE &
PERCOLATION TEST LOCATION
PLAN OF LAND
IN SOUTH YARMOUTH, MASSACHUSETTS
OWNED BY
ROSEANNA NIKOLAIDIS RE TR.
AT
812 ROUTE 28
SOUTH YARMOUTH, MA
PREPARED BY:
RAMN E. SHAY
NVIRONMENTAL SERVICES, INC.
85 ASHUMET ROAD
�, La ASHPEE, MA 02649
S rrl A _ TEL/FAX : 508-539-7966
SCALE: 1 "=20' DRAWN BY: CES DATE: APRIL 5, 2009
PROJECT- 812 RT 28 FILENAME: 812 RT 28 SHEET 1 OF 1