20221704 Ver 2_PUMP-AROUND_20230606

Ex. Tributary Stream C] MM °
CONSTRUCTION SEQUENCE FOR PUMP-AROUND OPERATION: "�to Aycock Swamp r
�� IMPERMEABLE PLASTIC to
\ ra -- Z N
N
GRID OR SIMILAR MATERIAL 1. INSTALL SPECIAL STILLING BASIN AT THE LOCATION SPECIFIED ON THE PLAN. r 0
VERIFY PUMP INTAKE HOSE r N
TEMPORARY 2. LAY OUT HOSES AND PUMPS FOR PUMP-AROUND AND WORK AREA DEWATERING •�
DIAMETER AND PUMP SIZE p1 Do
N
ADEQUATE TO DRAIN EX. SAND BAG DAM OPERATIONS. PROVIDE SUFFICIENT ROOM TO COMPLETE THE PROPOSED f 11
'�. STREAM FLOW OVERFLOW WEIR INSTALLATION IO THE TSTORMWATERHE PROPOSE DRAINAGE PIPE FOR THE STREAM CROSSING AND LJ m 00
\ (AS REQUIRED) THE INSTALLATION OF THE PROPOSED UTILITIES ACROSS THE RIPARIAN BUFFER. Z W �
W Z 00
` ` _ � 3. INSTALL PERMANENT RIPRAP APRON#3 AT PUMP-AROUND PUMP DISCHARGE HOSE Z w N
\ \ OUTLET TO SPREAD OUT AND SLOW VELOCITY OF FLOW BEFORE RE-ENTERING Q� d C]
\ \ W \ - '� X,• STREAM BOTTOM STREAM FLOW. D-
m\W. \ \ \ W W N \ ..ri,".,,..;;' ...: ":.:.,,:� ^:�'r.'z�'•`Ts ;•• P
� \ � \ \ �-:-: >�." -'��;'���.?•"� � � 4. CLEAR AREA AT LOCATION OF EACH TEMPORARY IMPERMEABLE SAND BAG DAM. W D) ❑ N
5. INSTALL TEMPORARY IMPERMEABLE SAND BAG DAM AT UPSTREAM END OF PROPOSED N ❑ 00
STREAM CROSSING PERPENDICULAR TO THE DIRECTION OF FLOW AND BEGIN P N ❑
128 � E FEF EEEEE IMPERMEABLE SAND BAG DAM PUMP-AROUND OPERATION TO DIVERT STREAM FLOW AROUND THE WORK AREA. w n1 U IL
PERFORM REGULAR MONITORING OF PUMP-AROUND PUMP OPERATION TO ENSURE u V Z
w \ \ \ NOT TO SCALE HOSE DIAMETER IS ADEQUATE TO DIVERT STREAM FLOW AND CHECK TO ENSURE Z w w
FILTER AT HOSE INLET DOES NOT CLOG AND RESTRICT FLOW. Z Z m
w \
" \ `•� \ \ \ 6. PLACE TEMPORARY IMPERMEABLE SAND BAG DAM AT DOWNSTREAM END OF W D
rn v) \ 4'MIN.SEDIMENT Z 00 Z
PROPOSED STREAM CROSSING PERPENDICULAR TO THE DIRECTION OF FLOW AND 0:
1 �`•���A 12'MIN. CONTROLSTONE
BEGIN DEWATERING PUMP OPERATION. PERFORM REGULAR MONITORING OF Q � w
\ STABILIZED OUTLET
r / \\ Q' \ \ \ DEWATERING PUMP OPERATION TO ENSURE HOSE DIAMETER IS ADEQUATE AND CHECK L9 Q 13 Z
`v IMPERMEABLE SAND BAG DAM V 7� "r'\n�-._ !-`-?'• - "` i „ _ TO ENSURE FILTER AT HOSE INLET DOES NOT CLOG AND RESTRICT FLOW. m W
\, (SEE DETAIL THIS SHEET) fl F W
14,\ WATER �i FLOW 7. INSTALL PROPOSED GRAVITY SEWER MAIN,SEWER FORCE MAIN,WATER MAIN AND 36., L-L 1 J
L�•i ; \ \ PERMEABLE �� STORMWATER DRAINAGE PIPE FROM DRAINAGE STRUCTURES 33-35 PARALLEL TO DEER p Q
1 ° RUN ROAD ACROSS ENTIRE WIDTH OF RIPARIAN BUFFER UNDER STREAM CROSSING. _ 4
i -� _A••,A A \ FLOW GEOTEXTILE BAG i U W
15'MIN. 12"MIN. - F
8. INSTALL PROPOSED STORMWATER DRAINAGE PIPE AND CONCRETE ENDWALLS FOR Q Q
DEER RUN ROAD STREAM CROSSING.
r \ 10'MIN. a
i rn PUMP-AROUND \\�\\ \ \ T \\ \\ �� i FLOW 9. IF IN-STREAM WORK EXTENDS BEYOND ONE DAY,OPEN WEIR SECTION OF SAND BAG ] = m i r PUMP SUCTION \ _ __
m � HOSE / ��\`gym \ ^`\ \ \\ --"--- - ---- � DAM TO ALLOW FLOW THROUGH THE WORK AREA OVERNIGHT. toCq
❑
i 10. ONCE ALL PIPES HAVE BEEN INSTALLED AND BACKFILLED WITHIN THE WORK AREA, In 00
8"SEDIMENT CONTROL IMMEDIATELY STABILIZE ALL GRADED AREAS WITH THE APPROPRIATE GROUND COVER
DEWATERING PUMP 12"MIN. #5 OR#57 STONE,TYP. AND REMOVE TEMPORARY IMPERMEABLE SAND BAG DAMS TO RESTORE STREAM V
DISCHARGE HOSE FLOW. P �/
PUMP-AROUND I �SA ' \ V A
PUMP
S \ PLAN VIEW 11. REMOVE SPECIAL STILLING BASIN AND STABILIZE DISTURBED AREA AS PER THE lil
T \
yS +S�FI-�-SF \ \ SEEDING SPECIFICATIONS ON PLAN SHEET C_31. U W
Sr�S \ \ 15'MIN. 12"MIN.
FEE EE V A
12 \ V A 4'MIN.
_ _ETn�TD_ETD TD-E D-E -� v v FLol,w � Bx ground profile CONSTRUCTION NOTES FOR PUMP-AROUND OPERATION:
1TD- D-ETUr T ETD-ETD-ETD- T �_;• 0 0 0 0 0 0 V A
/ E
1. A STANDBY PUMP SHOULD BE AVAILABLE AT THE PROJECT SITE DURING STREAM
PUMPING OPERATIONS.
0 0 0 0 0 0 0 0 0 0 \
E8"SEDIMENT CONTROL 2. ALL EXCAVATION SHALL BE PERFORMED IN ONLY DRY OR ISOLATED SECTIONS OF U
: U-
E- � Tp-ETD-ETD-ETD7 TD- TUE FILTER FABRIC\ UNDER STONE #5 OR#57 STONE,TYP. CHANNEL.
�T -ETD- TD-ETD-E _ETD-ETD TD- �\ \ �L \ Z J
3. IMPERMEABLE SAND BAG DAMS ARE TO BE USED TO ISOLATE THE WORK AREA FROM J
` 126 0 E E ELEVATION VIEW STREAM FLOW. '0 '^ Q
4. PUMP-AROUND PUMP AND HOSES SHALL BE OF SUFFICIENT SIZE AND CAPACITY TO = Uj Z
O -S F S DIVERT THE STREAM FLOW AROUND THE WORK AREA. �_ W
a F-SF-SF-S FI-z-EIF SF \ \ \ CONSTRUCTION SPECIFICATIONS Q ^ N O 5. DEWATERING PUMP AND HOSES SHALL BE OF SUFFICIENT SIZE AND CAPACITY TO N
1. INSTALL THE SPECIAL STILLING BASIN AT THE LOCATION SPECIFIED ON THE PLAN.PLAN THE SPECIAL STILLING DEWATER THE WORK AREA. MM N
`\ \ \ \ \\ BASIN ON LEVEL GROUND. W Q.LU rx
DEWATERING PUMP N \ \ \ \
T \ \ \ IMPERMEABLE SAND BAG DAM \ 2. PLACE GEOTEXTILE BAG ON A LEVEL BASE(8"SEDIMENT CONTROL#5 OR#57 STONE)AND DISCHARGE TO A O V
\ N� \\• \�\ (SEE DETAIL THIS SHEET) \ STABILIZED AREA.EXTEND SEDIMENT CONTROL STONE A MINIMUM OF 12 INCHES FROM EDGES OF BAG.THE COGEOTEXTILE BAG AND SEDIMENT CONTROL STONE SHALL BE CLEAN AND WITHOUT DEBRIS. CO � Z �'
\ \\ �\• \\ \\ \ �\ \ \\ \\ 3. CONTROL PUMPING RATE TO PREVENT EXCESSIVE PRESSURE WITHIN THE GEOTEXTILE BAG IN ACCORDANCE WITH rL c'
THE MANUFACTURER RECOMMENDATIONS.AS THE BAG FILLS WITH SEDIMENT,REDUCE PUMPING RATE. O O =
T I DEWATERING PUMP Q U
SUCTION HOSE I \ \ \ \ \ \ \ 4. REMOVE AND PROPERLY DISPOSE OF GEOTEXTILE BAG UPON COMPLETION OF PUMPING OPERATIONS,AFTER BAG
T \ V Y \\ \\ y \ HAS REACHED 3/4 SEDIMENT CAPACITY OR WHEN IT IS IMPRACTICAL FOR THE BAG TO FILTER THE SEDIMENT OUT a O U
\ \\\ \ \ \ \ AT A REASONABLE FLOW,WHICHEVER OCCURS FIRST.SPREAD THE DEWATERED SEDIMENT FROM THE BAG IN AN W
PUMP-AROUND PUMP .� \ \ APPROVED UPLAND AREA AND STABILIZE WITH SEED AND MULCH BY THE END OF THE WORK DAY.RESTORE THE Z
'r DISCHARGE HOSE \ \\ \\ \\\ \\ \\ ..\ \\ \ SURFACE AREA BENEATH THE BAG TO ORIGINAL CONDITION UPON REMOVAL OF THE DEVICE. cc W Z
y 1,,
DEWATERING PUMP `' \1\ \ \ \ \ \ \ \ 5. PROVIDE A GEOTEXTILE BAG CONSTRUCTED TO A MINIMUM SIZE OF 15 FEET x 10 FEET MADE OF A NONWOVEN
T DISCHARGE HOSE \ G \ \\ \\ \\ � \ \\ GEOTEXTILE.PROVIDE A SEWN-IN 8 INCHES(MAXIMUM)SPOUT FOR RECEIVING PUMP DISCHARGE HOSE.SEW THE Z =
SPECIAL STILLING BASIN BAG SEAMS WITH A DOUBLE NEEDLE MACHINE USING HIGH STRENGTH THREAD.THE SEAMS SHALL HAVE A O Cc
T :\ \ vL Uj
WATER PERMEABLE I ^` I m\\ \ \\ \ \\ \ \ MINIMUM WIDE WIDTH STRENGTH OF 60 POUNDS PER INCH IN ACCORDANCE WITH ASTM D4484. W 1
GEOTEXTILE BAG,TYP. U'•� I \\`� \ \ \ \ \ Cr
6. CONSTRUCT THE BAG WITH A GEOTEXTILE STABILIZED TO PROVIDE RESISTANCE TO UV DEGRADATION MEETING '1, LL
(SEE DETAIL THIS SHEET) \\ N \\�\\ \ \\ \ \ \ \\ THE FOLLOWING REQUIREMENTS: W J
cc
WEIGHT 8.0 ODYD ASTM D3776
GRABTENSILE 200 LB ASTM D4632
PUNCTURE 520 LB ASTM D6241 J
T \\ O 1 W\.\ \ FLOW RATE 80.0 GAL/MIN/SF ASTM D4491
T T OUTLET PUMP-AROUND PUMP DISCHARGE C PERMITTIVITY 1.2 1/SEC ASTM D4491
HOSE INTO RIPRAP APRON#3,TYP. \\ \ \ \ UV RESISTANCE 70%STRENGTH @ 500 HOURS ASTM D4355
7. REPLACE GEOTEXTILE BAG IF BAG CLOGS OR HAS RIPS,TEARS, OR PUNCTURES.DURING OPERATION KEEP
T 7 CONNECTION BETWEEN PUMP DISCHARGE HOSE AND GEOTEXTILE BAG WATER TIGHT. REPLACE SEDIMENT
T
121 I \\\ \\ \ CONTROL STONE IF IT BECOMES DISPLACED._ / _
/ ! )'\\\ \ \\ \ \ \\ 8. PROVIDE A SUFFICIENT QUANTITY OF GEOTEXTILE BAGS TO CONTAIN SEDIMENT FROM THE DEWATERING PUMP �
DISCHARGE DURING THE PUMP-AROUND OPERATION.
----t -----------
=_125 SPECIAL STILLING BASIN -
- -125= F� n \\ \` w \wrl WATER PERMEABLE GEOTEXTILE BAGCL
-------- o
NOT TO SCALE Q
STREAM CROSSING PUMP-AROUND PLAN
SCALE:1"=20' z
J
U CL
W
a
�? CMO SCALE: AS SHOWN
S DATE: 05-05-23
�30752 DRWN.BY:SGJ
����C11p�FF�4 y� CHKD.BY: EGT
•••'••.J.�•`• PROJECT NUMBER
B21117
05-05-23 O ING NO. S-T NO.
SP-2 2 OF 2