HomeMy Public PortalAbout30 Hosmer School Design (PDF)0)
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SEE
DTE 3
CHINKING STONES
SEE NOTE 5.
�A
PROFILE
EXISTING 3" MINIMUM & 9" MAXIMUM
PAVEMENT PONDING DEPTH
BIORETENTION
SURFACE
FILTER FABRIC
(MIRAFI 140N OR
APPROVED EQUIV.)
APPROVED NATIVE MATERIAL SUBGRADE
3EE
)TC
PRE-TREATMENT
FOREBAY x
SEE PLANS OUTLET
17 STRUCTURE
SEE BIORETENTION CELL
\/ FLOW 6" MAX. VARIES DETAILS
x
3/4" TO 11/2"' 6" MIN.
CRUSHED
AGGREGATE x
FILTER FABRIC MIRAFI 140N OR SECTION A -A
APPROVED EQUIVALENT
NOTES:
1. STONE SIZE: MINIMUM WIDTH AND LENGTH - 18"-24". x
2. PLACE THE STONES ACROSS THE WIDTH OF THE BIORETENTION AREA.
3. KEY STONE INTO THE BIORETENTION EMBANKMENT. EXTEND INTO EMBANKMENT A MINIMUM OF 18" TO PREVENT FLOW FROM
DIVERTING THE CHECK DAM.
4. ADD CHINKING STONES AS NECESSARY TO FILL CREVICES BETWEEN STONES.
5. CONSTRUCT THE TOP OF THE CHECK DAM SO THE CENTER IS APPROXIMATELY 6" LOWER THAN THE OUTER EDGES, FORMING A WEIR x
THAT WATER CAN FLOW ACROSS. X
6. DO NOT EXCEED A MAXIMUM HEIGHT OF 6".
STONE CHECK FOR BIORETENTION x
x
c�
TYPICAL DETAIL
NOT TO SCALE
x �
BIORETENTION
PLANTING
x
6„ FURNISHED
TYP. BIORETENTION SOIL
DMH #6
RIM:72.31'
3:1 TYP.11, \ \ \ x IN IN (DMH #10): 67.57'
3„ /\\//\�\\\�/ INV OUT (WQI #2): 67.38'
BIORETENTION DETAIL
NOT TO SCALE
RIVER ROCK
3' WIDE AT RECEIVING
END CHANNEL
FOREBAY / / / FOREBAY /
// '
D—
/// CONCRETE DRAINAGE/
FLUME APRON /
TOE OF /j / 1 3° • /j // /j EXISTING
/ SLOPE a 31 / VERTICAL
SLOPE GRANITE
a CURB
1 1 121' - 12" RCP
GUTTER LINE GUTTER LINE S=1.2%
1'-
6"
GRANITE CURB
i CORNER
6' TYPE -A
NOTES:
1. THE STONE END SECTION TO BE PLAN VIEW LOW POINT AT INLET
UNDERCUT SO THAT THE INVERT OF THE (DEPRESS 1" BELOW TYPICAL
APRON TO BE AT THE SAME GRADE GUTTER SLOPE)
(FLUSH) WITH THE SURFACE OF THE 18 X
RECEIVING CHANNEL.
2. THE WIDTH OF THE END OF THE APRON �.
SHALL BE EQUAL TO THE BOTTOM WIDTH 2 1 6" 1 2\/\\%
OF THE RECEIVING CHANNEL. MAXIMUM
TAPER TO RECEIVING CHANNEL 5:1.
�j� — —74- — —
FINISH PAVEMENT APPROVED SUBGRADE D D
EXISTING
GRANITE CURB CHANNEL SECTION
V-6" TAPERED RELIEF 1"
BELOW GUTTER LINE
6" CRUSHED / /
` STONE
CONCRETE
j� ! APRON /
3'
TOE FABRIC 1//l<\6" 11\
EXTEND FLUME
TO TOE OF SLOPE
6-10" THICK
RIVER ROCK
SECTION VIEW (D50 = 3")
STONE & FILTER
BIOSWALE INLET DETAIL FABRIC
NOT TO SCALE APPROVED SUBGRADE
18"
MIN.
W -
VERTICAL EXCAVATION SLOPE
(PREFERRED) OR ALTERNATIVE SLOPE
(MAX. 1:1)
CONTRACTOR SHALL BE RESPONSIBLE
FOR SLOPE STABILIZATION
\ BENCHMARK
\ TOP OF HYDRANT
\ SPINDLE EL=75.89 /
— X� X X
D _
10" ROOF DRAIN
INV. = 69.33'
HOSMER ELEMENTARY
SCHOOL
c�
D D
a
35' - 12" RCP NEATLY SAWCUT AND
S=1.0% / MATCH EXISTING
/ GRADE
/ CURB CUT
/ w RE -GRADE TO
/ PROPOSED
I \\
I
1 \
DMH
\ RIM: 72
\ INV IN (ROOF): 6&'
\ INV IN (WQI #2): 66
\ INV OUT (DMH #6): 66
\ O
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\� \ L
—� D D D \
\\ O
S
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NOTES:
1. EXISTING CONDITIONS BASED OFF PLAN TITLED, "ADDITION AND
RENOVATIONS AT THE HOSMER ELEMENTARY SCHOOL"
WATERTOWN, MA. PREPARED BY: GALE ASSOCIATES, INC.
DATED: JANUARY 22, 2001
SOIL TEST PIT DATA
PERFORMED BY: JANET C. BERNARDO, HORSLEY WITTEN GROUP, INC
DATE: DECEMBER 30, 2016.
TP-3
p" 54.8
A
FILL
4" 53.8
IL
NO REDOXYMORPHIC
FEATURES
22' - 12" RCP
S=2.5%
- W - - - - - -
D D� D SEDIMENT FOREBAY D D D \ D W D- D W D D
EL=69.9' -
AREA = 54 SF U) U)
FIELD VERIFICATION HANCOCK STREET z LUAPPROX. LOCATION
DRAIN LINES ON DEPTH OF GAS
/ LINE
CB #3
RIM: 70.56' BIORETENTION AREA - - - - - - -
INV OUT (WQI #2). 67.2 SURFACE AREA = 372 SF
-
EL = 69.9'
PAVED FLUME
- G
----
-- G
\-------
o I �/ / T� #� CURB CUT
SOIL STOCKPILING
EXISTING WALL / AND STAGING
-TO REMAIN ENO' / AREA
27' - 12" RCP / -
S=1.0% / / - S -----
/ 0
'ATER QUALITY INLET #2
i,000 GALLON TANK
RIM: 70.74' ` CB #4
— — —7�- - INV IN (CB #3): 67.05' / 'RIM: 68.55'
/ INV IN (DMH #4): 67.05' I (DMH #7): 6 00'
INV OUT (DMH #5): 66.80' /
30'-12"RCP 44'-12"R RCP
S= 2.2 /o
S=1.1% LIMIT OF WORK
/ AREA = 1,827 SF /
DMH #4
a RIM: 71.72'
L�u \ INV IN (DMH #3): 67.57'
I \ INV OUT (WQI #2): 67.38'
—__-----72--
------------ --
G------------ G
CB #7
RIM: 68.00'
INV :63.00'
INV IN (CB #5): 62. '
INV OUT (WQI #3): 62.21'
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13'-12"
S=1.7%
GRAPHIC SCALE
10 0 5 10 20
(in feet)
1 INCH = 10 FEET
R"
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Registration:
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40 Project Number: Sheet
15145A 1 of 1
Sheet Number:
C - 1