Plan sheet 2 of 2 (1).pdfEXISTING HEADWALL
INV.= 145.49
EXISTING
HEADWALL
INV.= 145.67
EXISTING
HEADWALL
INV.= 144.91
EXISTING
HEADWALL
INV.= 144.67
EXISTING PIPE
INV. = 143.307
INV. = 143.305
42" RCP
EXISTING
WALKING PATH
EXISTING CONCRETE SIDEWALK
EXISTING
HEADWALL
INV.= 145.28
EXISTING
HEADWALL
INV.= 145.04
EXISTING
HEADWALL
INV.= 145.79
PROP. 12 CY EXCAVATION
AT INLET
PROP. 1.5 CY
EXCAVATION AT
INLET AND OUTLET
PROP. 4.5 CY
EXCAVATION
AT OUTLET PROP.
3 CY EXCAVATION AT INLET
1 CY EXCAVATION AT OUTLETS (X2)
PROP. LOGGING MATS FOR ACCESS
(TYP.)
TEMP. BVW IMPACT = 1280. SF
PROP. 1 CY
EXCAVATION AT
OUTLET
24" RCP
12
"
R
C
P
12
"
R
C
P
12
"
R
C
P
24" RC
P
1
2
3
4
5 6
7 8
PROP. LOGGING MATS
FOR ACCESS
EXCAVATE MATERIAL USING
HAND TOOLS AND/OR VIA
PARKING LOT
EXCAVATE MATERIAL
USING HAND TOOLS
EXCAVATE MATERIAL
USING HAND TOOLS
EXISTING
HEADWALL
EXISTING
HEADWALL/PIPE
L = 64 FT
FL
O
W
FL
O
W
L = 40 FT
W =
2
0
F
T
L = 36 FT
W
=
2
0
F
T
W =
2
0
F
T
HEADWALL EXCAVATION TABLE
HEADWALL NUMBER LENGTH
(FT)
WIDTH
(FT)
BANK LUWW (SF)DEPTH (FT)VOLUME (CF)VOLUME (CY)
1 80 4 160 320 1 320 11.85
2 10 4 20 40 1 40 1.48
3 10 4 20 40 1 40 1.48
4 30 4 60 120 1 120 4.44
5 20 4 40 80 1 80 2.96
6 10 2 20 20 1 20 0.74
7 10 2 20 20 1 20 0.74
8 10 2 20 20 1 20 0.74
TOTAL =24.44
NOTES:
1) THE ONLY LOGGING MATS THAT ARE TO BE PLACED
WITHIN THE WETLANDS ARE FOR THE EXCAVATION AT
HEADWALL NUMBER ONE (1).
2)ALL OTHER MATS REQUIRED FOR THE REMAINING
HEADWALLS SHALL BE PLACED OUTSIDE OF THE
WETLAND TO MINIMIZE WETLAND IMPACTS.
NORTHAMPTON IMPACTS TABLE
LUWW 660. SF
BANK 360. LF
BVW (LOGGING MATS)1,280 SF
NORTHAMPTON CONSTRUCTION PLAN
DI
T
C
H
C
L
E
A
N
I
N
G
_
H
D
1
(
C
O
N
S
T
R
U
C
T
I
O
N
P
L
A
N
S
)
.
D
W
G
20
-
J
u
l
-
2
0
1
5
3:
4
6
P
M
Pl
o
t
t
e
d
o
n
0
SCALE: 1" = 40'
40 160100
FED. AID PROJ. NO.SHEET
NO.
TOTAL
SHEETS
2
STATE
MA
PROJECT FILE NO.
-
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2
N. KING STREET & EXIT 21 DRAINAGE
STRUCTURE MAINTENANCE