Northampton ConCom Plans July 2015 (2).pdfEXISTING
HEADWALL
INV. = 142.6
EXISTING
HEADWALL
INV. = 139.5
EXISTING
HEADWALL
INV. = 140.3
EXISTING
HEADWALLS
INV. = 138.3
INV. = 138.1
A
EXISTING 4' CONCRETE WATERWAY
EXISTING STONE LINED
DRAINAGE DITCH
EXISTING HEADWALL
INV. = 138.9
42" RCP
54" R
C
P
54"
R
C
P
54"
R
C
P
EXISTING STONE LINED CHANNEL -
PROP. CLEANING AND
RESTORATION BEGINS
EXISTING STONE LINED
CHANNEL - PROP.
CLEANING AND
RESTORATION ENDS
A
B
B
PROP. LIMIT OF
WORK (TYP.)
PROP. LOGGING
MATS FOR ACCESS
PROP.
SHRUB/VINE/PLANT
REMOVAL AREA BEGINS
PROP. INVASIVE
SHRUB/VINE/PLANT
REMOVAL AREA ENDS
RETAIN TREE AND SHRUBS BASED ON
CONDITION DURING CONSTRUCTION
FLOW
FLO
W
L = 116 FT
W
=
2
0
F
T
APPROX. LENG
T
H
O
F
D
I
T
C
H
=
1
2
8
F
T
EXISTING
HEADWALL
EXISTING
HEADWALL
AND PIPE
FLOW
EXISTING
HEADWALL
10.00'10.00'
SEED SIDE SLOPES WITH
EROSION CONTROL AND
RESTORATION SEED MIX
INVASIVE PLANT REMOVAL TYPICAL
SECTION B-B
ȭ
EXISTING CONCRETE WATERWAY
OR UNLINED STONE DRAINAGE DITCH
NOTES:
1) BRUSH SHALL BE CLEARED TEN (10)
FEET FROM THE CENTERLINE OF THE
EXISTING CONCRETE WATERWAY OR
UNLINED DRAINAGE CHANNEL.
2)BRUSH SHALL BE CUT FLUSH WITH
EXISTING GROUND LEVEL TO MINIMIZE
SOIL DISTURBANCE.LINE CHANNEL BOTTOM
AND SLOPES WITH
GEOTEXTILE FABRIC
NOTES:
1) THE CONTRACTOR WILL BE RESPONSIBLE FOR
CONTROL OF WATER DURING WORK. THE WATER
SHALL BE INTERCEPTED UPSTREAMOF THE WORK
AREA AND BE PUMPED BACK INTO THE DITCH AT A
LOCATION DOWNSTREAM FROM THE WORK. THE
EXCAVATION AND WATER CONTROL SHALL BE DONE
IN THE DRY AND IN A MANNER TO AVOID EROSION
AND SILTATION.
DITCH SHAPING TYPICAL
SECTION A-A
DEPTH VARIES
0' TO 1' (MAX)
1:1
1:
1
2.00'
ROUND TOP TO BLENDROUND TOP TO BLEND
WORK
AREA CHANNEL
FLOW
SAND BAG DAM OR
APPROVED DAM
MATERIAL
EXISTING HEADWALL
PROP. HOSE FOR
WATER CONTROL
PROP. PUMP FOR
WATER CONTROL
WATER CONTROL TYPICAL
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
10
-
J
u
l
-
2
0
1
5
11
:
2
2
A
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.
-
--------
1
N. KING STREET & EXIT 21 DRAINAGE
STRUCTURE MAINTENANCE
EXISTING 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.)
PROP. 1 CY
EXCAVATION AT
OUTLET
24" RCP
12
"
R
C
P
12
"
R
C
P
12
"
R
C
P
24" RC
P1
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
FLOW
FLOW
FLOW
HEADWALL EXCAVATION TABLE
HEADWALL NUMBER LENGTH (FT)WIDTH (FT)AREA (SF)DEPTH (FT)VOLUME (CF)VOLUME (CY)
1 80 4 320 1 320 11.85
2 10 4 40 1 40 1.48
3 10 4 40 1 40 1.48
4 30 4 120 1 120 4.44
5 20 4 80 1 80 2.96
6 10 2 20 1 20 0.74
7 10 2 20 1 20 0.74
8 10 2 20 1 20 0.74
STA. 11+08 TO STA. 12+40 128 2 256 1 256 9.48
TOTAL =33.93
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 LUW IMPACTS TABLE
TEMPORARY AREA (SF)
HEADWALL LUW 916
LOGGING MATS 1,280
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
10
-
J
u
l
-
2
0
1
5
11
:
2
2
A
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.
-
--------
2
N. KING STREET & EXIT 21 DRAINAGE
STRUCTURE MAINTENANCE