20201887 Ver 1_More Info Received_20210304

Strickland, Bev
From: Alex Aycrigg <[e-mail]>
Sent: Thursday, March 4, 2021 11:18 AM
To: Goss, Stephanie
Cc: Phillips, George L CIV USARMY CESAW (USA)
Subject: [External] RE: DWR #20201887 FV Water Line Replacement
Attachments: Temporary Pump Around Detail.pdf
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Stephanie,
Thanks for your questions. Please see below responses. I look forward to receiving the Water Quality Certification as this
job is going to bid this week.
Best,
Alex
Alex Aycrigg, PWS
Project Manager
Wetland Scientist
FROEHLING & ROBERTSON, INC.
310 Hubert Street Raleigh, NC 27603 1 USA
T 919.719.1088 1 F 919.582.0304 1 M 919.630.3330
www.FandR.com
INTRODUCING the NEW FandR.com!
in f
From: Goss, Stephanie <[e-mail]>
Sent: Monday, March 1, 2021 11:56 AM
To: Alex Aycrigg <[e-mail]>
Cc: Phillips, George L CIV USARMY CESAW (USA) <George.L.PhiIli [e-mail]>
Subject: DWR #20201887 FV Water Line Replacement
Alex,
I have the following questions regarding the above referenced project:
1. Will the 6 stream impacts be open cut. This is not detailed in the application. If so, please describe the method
for open cutting. The water mains will be installed via open cut. The intent is to have the contractor perform the
work during a dry/low flow period. The contractor's construction method will vary based on the
season/weather. Depending on the flow condition at the time of installation, this may mean temporarily
damming the channel and using the attached temporary pump around detail.
2. Will the impacts be performed in the dry? Will this be accomplished via dewatering or during the dry season? If
so impacts are being performed via dewatering, please describe method for dewatering and has this taken into

account on the impact maps/table? Please also see response to question 1. The pipe installation will occur
quickly so the need to consider temporal impacts is not needed. The proposed impacts are temporary in nature
and do not require mitigation. Please see attached pump -around schematic for use when needed.
Thanks in advance.
Stephanie Z. Goss
Environmental Program Consultant
Division of Water Resources
Raleigh Regional Office
3800 Barrett Drive
Raleigh, NC 276o9
919-791-4256
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APPROVED SEDIMENT FILTERING DEVICE
(SEDIMENT FILTER BAG). PROVIDE
POSITIVE DRAINAGE FROM SEDIMENT STREAM DIVERSION PUMP
FILTER BAG TO STREAM. ---,DISCHARGE HOSES
DISCHARGE ONTO
STABLE RIPRAP
PAD TO PREVENT
SCOUR HOLE
FLOW SEDIMENT
- DIKES
PHOSEDEWATERING PUMP
INTAKE CLEAN WATER
DIKE
WORK AREA LENGTH NOT TO EXCEED THAT
WHICH CAN BE COMPLETED IN ONE DAY
INTAKE HOSE
FLOW�- --�
SUMP -HOLE FOR POOL
(12" TO 18" DEEP, 2-FT DIAMETER)
TEMPORARY PUMP AROUND SEQUENCE
1. SET UP PUMP WITH SUCTION AND DISCHARGE HOSE.
2. INSTALL UP -STREAM SANDBAG DAM.
3. INSTALL DOWN -STREAM SANDBAG DAM.
4. THE PUMP MUST RUN CONTINUOUSLY WHILE WORKING IN THE STREAM.
5. STREAMBANKS MUST BE STABILIZED AT THE END OF EACH DAY.
NOTES:
1. SANDBAG DIKES SHALL BE SITUATED AT THE UPSTREAM AND DOWNSTREAM ENDS OF THE WORK AREA, AND STREAM FLOW
SHALL BE PUMPED AROUND THE WORK AREA. THE PUMP SHOULD DISCHARGE ONTO A STABLE VELOCITY DISSIPATER
CONSTRUCTED OF RIPRAP OR SANDBAGS.
2. WATER FROM THE WORK AREA SHALL BE PUMPED TO A SEDIMENT FILTERING MEASURE SUCH AS A SEDIMENT BAG OR OTHER
APPROVED DEVICE. THE MEASURE SHALL BE LOCATED SUCH THAT THE WATER DRAINS BACK INTO THE CHANNEL BELOW THE
DOWNSTREAM SANDBAG DIKE WITHOUT CAUSING FURTHER EROSION BETWEEN THE SEDIMENT FILTER BAG AND THE STREAMBANK.