20170172 Ver 1_NEP Area 2-Revised Details_20170314

Zaw
OJU
pzw
<o.
Z11~
2,7,
Uxw
0
o0m
Ua0
oZw
-o
wCc, N
0
zzw
Z
DOm
o
m,
x U_¢
F,
0Y1
waw
D_
woo
°w¢
o.w
Dzo<
o
Ow
o
wG�
w
w�Q
wiz
6'o
wn¢
>00
WIZ
w3<
wF�
xao
�zw
w0< a
¢�
H
zlz
:2w
0 z Do
zo
w
°n_
.0
U
p00
Y N Q
z
U
00F,
'10
xww
SOzmF
EROSION CONTROL MATTING
FILTER FABRIC
(CLASS B)
EXIST BANK
r�
2.0'
1.5'
DE-WAT
IMPERVIOI
DII
SILT BAG
LOCATION
S
1.5'
CHANNEL SEEDING
1. EACH RIP RAP PLACEMENT SHALL BE BEDDED IN LAYER OF FILTER
FABRIC. PLACEMENT OF RIP RAP SHALL IMMEDIATELY FOLLOW THE
PLACEMENT OF THIS LAYER. KEEP VOIDS TO A MINIMUM AND FORM A DENSE
WELL GRADED MASS OF STONE. DO NOT DISLODGE THE UNDERLYING
BASEOF FABRIC WHEN PLACING STONE.
2. MAXIMUM SLOPE OF THE CHANNEL BANK SHALL NOT EXCEED 1.0
HORIZONTAL TO 1.0 VERTICAL. FINISHED GRADE OF THE RIP RAP IS
TOBLEND WITH THE SURROUNDING AREA.
3. INSPECT RIP RAP PERIODICALLY FOR SCOUR OR DISLODGED
STONES(ESPECIALLY AFTER SEVERE STORMS) AND WEED BRUSH GROWTH.
4. THE MINIMUM THICKNESS OF THE RIP RAP LAYER SHALL BE 24 INCHES OF
CLASS B.
MATCH EXISTING STREAM BED GRADE
L°
CREEK CROSSING STABILIZATION
NOT TO SCALE
TEMPORARY SEED MIX
LATE WINTER/EARLY SPRING
-RYE (GRAIN) @ 120 LB/ACRE
SUMMER
-GERMAN MILLET @ 40 LB/ACRE
-SUDANGRASS @ 50 LB/ACRE (AS A SUBSTITUTE)
FALL
-RYE (GRAIN) @ 120 LB/ACRE
PERMANENT RIPARIAN SEED MIX (IDEALLY PLANTED EITHER
AUG -SEPT OR MAR-APR)
-REDTOP @ 7 LB/ACRE
-SWITCH GRASS @ 50 LB/ACRE
-SEDGE @ 10 LB/ACRE
-RICE CUTGRASS @ 20 LB/ACRE
NOTE:
ALTERNATIVE SPECIES MAY BE USED UPON APPROVAL BY
THE ENGINEER.
ULASSA61UNE
EXISTING
GROUND
DISCHARGE
15' TO 20' HOSE
STABILIZED
OUTFALL CLASS
A STONE
CONSTRUCTION NOTES:
1. INSTALL EROSION CONTROL
MEASURES AND TREE
PROTECTION AS SHOWN ON
PLAN. THE CONTRACTOR MAY
MODIFY OR RELOCATE EROSION
CONTROL MEASURES TO MAKE
ADJUSTMENTS FOR
UNFORESEEN FIELD CONDITIONS.
ALL RELOCATION SHALL HAVE
THE APPROVAL OF THE
ENGINEER.
2. CLEAR AND GRUB AREA OF ALL
TRASH AND EXOTIC/INVASIVE
VEGETATION.
3. STABILIZE GRADED BANKS WITH
SEED AND MULCH.
4. INSTALL COIR FIBER MAT PER
MANUFACTURER'S INSTRUCTION.
5. INSTALL PLANTS AS DESCRIBED
IN PLANTING NOTES ON THIS
SHEET.
NOTES
(_'RAVGI CI IRCTRATF A
HOSE 1. EXCAVATION SHALL BE PERFORMED ONLY IN DRY AND/OR ISOLATED SECTIONS OF
CHANNEL.
PUMP AROUND 2. IMPERVIOUS DIKES SHOULD BE USED TO ISOLATE WORK AREAS FROM STREAM
PUMP FLOW
US DIKE
2GE HOSE
D BE KEPT
AREA
FILTER FABRIC
8" OF CLASS A
STONE
EXISTING
NOTES: CHANNEL SILT BAG PROFILE
1. BAG SHALL BE SIZED CORRECTLY FOR FLOW RATE OF PUMP.
2. CONTENTS COLLECTED BY SEDIMENT BAG SHALL BE DISPOSED OF AT AN ACCEPTABLE LOCATION.
3. THE CONTRACTOR SHALL NOT DISTURB MORE AREA THAN CAN BE STABILIZED IN
ONE WORKING DAY. A MAXIMUM OF 200 FEET MAY BE DISTURBED AT ANY ONE
TIME.
4. THE CONTRACTOR SHALL BE RESPONSIBLE FOR DETERMINING PUMP SIZE
SUFFICIENT TO PUMP BASE FLOW.
5. DIKE MUST BE CONSTRUCTED OF NON -ERODIBLE MATERIALS SUCH AS SANDBAGS.
SEQUENCE OF CONSTRUCTION FOR TYPICAL PUMP AROUND
1. INSTALL STILLING BASIN AND STABILIZED OUTFALL USING CLASS A RIP RAP AT THE
DOWNSTREAM END OF THE DESIGNATED PROJECT WORKING AREA.
2. THE CONTRACTOR SHALL INSTALL THE PUMP AROUND PUMP AND THE TEMPORARY
PIPING THAT WILL CONVEY THE BASE FLOW FROM UPSTREAM OF THE WORK AREA
TO THE STABILIZED OUTFALL.
3. INSTALL UPSTREAM IMPERVIOUS DIKE AND BEGIN PUMPING OPERATIONS FOR
STREAM DIVERSION.
4. INSTALL THE DOWNSTREAM IMPERVIOUS DIKE AND DEWATERING PUMPING
APPARATUS IF NEEDED TO DEWATER THE ENTRAPPED AREA. THE PUMP AND HOSE
FOR THIS PURPOSE SHALL BE OF SUFFICIENT SIZE TO DEWATER THE WORK AREA.
THIS WATER WILL ALSO BE PUMPED TO AN OUTFALL STABILIZED WITH CLASS A RIP
RAP.
5. THE CONTRACTOR SHALL PERFORM CULVERT WORK IN ACCORDANCE WITH THE
PLAN.
6. THE CONTRACTOR SHALL EXCAVATE ANY ACCUMULATED SILT AND DEWATER
BEFORE REMOVAL OF THE IMPERVIOUS DIKE. WHEN DEWATERING AREA, ALL
DIRTY WATER MUST BE PUMPED THROUGH A SILT BAG. REMOVE IMPERVIOUS
DIKES, PUMPS, AND TEMPORARY FLEXIBLE HOSE/PIPING STARTING WITH THE
DOWNSTREAM DIKE FIRST.
7. ONCE THE WORKING AREA IS COMPLETED, REMOVE ALL RIP RAP AND IMPERVIOUS
DIKES AND STABILIZE DISTURBED AREAS WITH SEED AND MULCH.
8. ALL WORK IN CHANNEL MUST BE COMPLETED BEFORE REMOVING IMPERVIOUS
DIKE.
STREAM BYPASS DETAIL
NOT TO SCALE
EROSION CONTROL MATTING
MAXIMUM
WIDTH OF DISTURBANCE N
LIMITED TO 15'
A
STREAM BED CONTROL - PLAN VIEW
MATCH EXISTING CHANNEL FULLBANK WIDTH
BANKFULL ELEVATION
1.5' MIN. INVERT SET AT PROFILE
GRADE
FILTER 2.T 5'
FABRIC
P.
GRAVEL SUBSTRATE GRADE CONTROL ROCK
50 / 50 MIX OF IN SITU SOIL
AND # 5 STONE 50 / 50 MIX CLASS B / 1 RIP RAP
TOP OF RIFFLE
(MATCH EXISTING ELEV.)
SLOPE VARIES
FILTER ----
FABRIC GRAVEL SUBSTRATE
50 / 50 MIX OF IN SITU SOIL
AND # 5 STONE
STREAM BED CONTROL - SECTION A -A
FLOW Now
DESIGN BED
SURFACE
GRADE CONTROL ROCK
50 / 50 MIX CLASS B / 1 RIP RAP
STREAM BED CONTROL - PROFILE B -B
STREAM BED CONTROL DETAIL
NOT TO SCALE
NOTE:
EROSION CONTROL MATTING
BANKFULL ELEVATION
BOTTOM OF RIFFLE -
(MATCH EXISTING ELEV.)
MIN ^I 11.5'M
PRIOR TO ANY LAND DISTURBING ACTIVITIES, CONTRACTOR SHALL CLEARLY
MARK WITH ORANGE FABRIC FENCING ALL WETLANDS, STREAMS, SURFACE
WATERS, AND RIPARIAN BUFFERS LOCATED ON THE PROJECT SITE WHERE
IMPACTS ARE NOT ALLOWED.
J
z
O
z
O
Q
z
0
fr
O
O
U
0
z
Q
UJ
W
cr
cr
O
LL
Q
Cz
G
J
W
n�
DWK
DICKSON
community infrastructure consultants
401 4TH STREET SW
SUITE 201
HICKORY, NC 28602
(t) 828-327-6911
(f) 828-327-9164
WWW.WKDICKSON.COM
NC LICENSE NO.F-0374
PROFESSIONAL SEAL
�m
J_
Q
w
❑ ❑
U) o
O Q a
w >- L)
fr m cin
LU
OLLI
Q ❑
_W
w cn
D= ❑
W
❑
❑
Q
r`
Lu
C
M
1 I -I o
H
w
3 U)
O z
CL O
U) U) C/)
2 > J
W F Q
I-
U m W
cj W 0
Z
O
H <Q
m W N
EE z J
~ a
0 Cn
X Q
w
>Q W
c H
N Q c/)
w U
Q
IL
W
2 Z
Z
U Z
w
O Q
cr cr
d ❑
PROJ. MGR.: RH
DESIGN BY: CH
DRAWN BY: CH/NS
PROJ. DATE: JAN 2017
DRAWING NUMBER:
D.7 OF 49
WKD PROJ. NO.:
20150198.00. H I