20090573 Ver 1_More Info Received_20090723

BLACK & VEATCH oq- oS 13
Building a world of difference'
Winston-Salem/ Forsyth County Utility Commission
R.A. Thomas Water Treatment Plant Improvements
Sue Homewood
NC DWQ, Winston-Salem Regional Office
585 Waughtown Street
Winston-Salem, NC 27107
Subject: 401 Water Quality Certification
Dear Sue Homewood,
B&V Project 145730
B&V File D-1.4
July 21, 2009
° @ TIN/
UL 3 2099
WE rLAf OS AND SXR? Ef BRANCH
In response to your additional information request for the Section 401 Water Quality Certification
Application for the R.A. Thomas Water Treatment Plant Improvements, please find the following:
• Revised pages 6, 7, and 8 of the Pre-Construction Notification Form enumerating the temporary
impacts of stream impacts S2 and S3 which result in 110 linear feet of temporary impacts increasing
the total impact to 239 linear feet.
• Letter from Brian Walker of Pizzagalli Construction Company describing how they plan to construct
the pipelines and structures associated with these stream impacts.
• Revised Location Map illustrating the locations of the enumerated stream impacts.
• Contract Drawing Sheet B36 which includes construction detail CS for stream stabilization. Note
that the detail shows the riprap installed below the stream bed with the top of riprap matching the top
of stream bed elevation.
Sincerely,
r
Kurtis Proffit, P.E.
Enclosure[s]
cc: Ian McMillan, NC DWQ, Wetlands/401 Certification Unit (w/ enclosures)
John Thomas, U.S. Army Corps of Engineers (w/ enclosures)
David Saunders, CCUC (w/o enclosures)
Terry Cornett, B&V (w/o enclosures)
Jeff Davis, B&V (w/o enclosures)
BLACK & VEATCH INTERNATIONAL COMPANY - 9000 Regency Parkway, Suite 200 Cary, NC 27518-919-462-7501 • Fax [phone]
2. Wetland Impacts
If there are wetland impacts proposed on the site, then complete this questio n for each wetland area impacted.
2a. 2b. 2c. 2d. 2e. 2f.
Wetland impact Type of jurisdiction
number - Type of impact Type of wetland Forested (Corps - 404, 10 Area of impact
Permanent (P) or (if known) DWQ - non-404, other) (acres)
Temporary T
W1 ? P ? T ? Yes ? Corps
? No ? DWQ
W2 ? P ? T ? Yes ? Corps
? No ? DWQ
W3 ? PEI T ? Yes ? Corps
? No ? DWQ
W4 ? P ? T ? Yes ? Corps
? No ? DWQ
W5 ? P ? T ? Yes ? Corps
? No ? DWQ
W6 ? P ? T ? Yes ? Corps
? No ? DWQ
2g. Total wetland impacts
2h. Comments:
3. Stream Impacts
If there are perennial or intermittent strea m impacts (including temporary impacts) proposed on the site, then complete this
question for all stream sites impacted.
3a. 3b. 3c. 3d. 3e. 3f. 3g.
Stream impact Type of impact Stream name Perennial Type of jurisdiction Average Impact
number - (PER) or (Corps - 404, 10 stream length
Permanent (P) or intermittent DWQ - non-404, width (linear
Temporary (T) (INT)? other) (feet) feet)
Demolition of the
existing and
construction of a
S1 SPOT new Plant Outlet Unnamed ® PER ® Corps 20 51
Structure in the Tributary ?INT ? DWQ
same location in a
dead end branch
off the stream
Culvert extension
and construction
S2 ® P ? T of a concrete Unnamed ® PER ® Corps

endwall with rip-
Tributary
? INT
? DWQ 13 40
rap outlet
stabiliziation
12"Lagoon

S3 ®P El T Decant creek
crossing with rip- Unnamed ® PER ® Corps
10
38
rap stream Tributary ? INT p
WQ
stabilization
Temporary stream
bypass for Stream
Impact No. S2
S4 ? P ®T with bypass Unnamed ® PER ® Corps

pumping and
Tributary
? INT
? DWQ 13 90
cofferdams
located 80'
upstream and 10'
Page 6 of 12
PCN Form - Version 1.3 December 10, 2008 Version
downstream .
Duration of
approximately 6
weeks.
Temporary stream
bypass for Stream
Impact No. S3
with bypass
pumping and
S5 ? P ®T cofferdams
' Unnamed ® PER ® Corps 10 20
located 10 Tributary ? INT ? DWQ
upstream and
downstream.
Duration of
approximately 1
week.
S6 ? P ? T ? PER ? Corps
? INT ? DWQ
3h. Total stream and tributary impacts 239
3i. Comments: Note that stream impact No. S1 is actually a dead end branch off the unnamed tributary and will not impact the
flow through the tributary. Temporary bypassing is therefore not required for this impact.
4. Open Water Impacts
If there are proposed impacts to lakes, ponds, estuaries, tributaries, sounds, the Atlantic Ocean, or any other open water of
the U.S. then individually list all open water impacts below.
4a. 4b. 4c. 4d. 4e.
Open water Name of waterbody
impact number - (if applicable) Type of impact Waterbody type Area of impact (acres)
Permanent (P) or
Temporary T
01 ?P?T
02 ?P?T
03 ?P?T
O,i ?P?T
4L Total open water impacts
4g. Comments:
5. Pond or Lake Construction
If and or lake construction proposed, then complete the chart below.
5a. 5b. 5c. 5d. 5e.

Pond ID
Proposed use or purpose Wetland Impacts (acres) Stream Impacts (feet) Upland

number (acres)
of pond
Flooded Filled Excavated Flooded Filled Excavated Flooded
P1
P2
5L Total
59. Comments:
5h. Is a dam high hazard permit required?
? Yes ? No if yes, permit ID no:
5i. Expected pond surface area (acres):
5j. Size of pond watershed (acres):
5k. Method of construction:
Page 7 of 12
PCN Form - Version 1.3 December 10, 2008 Version
6. Buffer Impacts (for DWQ)
If project will impact a protected riparian buffer, then complete the chart below . If yes, then individually list all buffer impacts
below. If an impacts require mitigation, then you MUST fill out Section D of this form.
6a.
? Neuse
? Tar-Pamlico ? Other:
Project is in which protected basin? ? Catawba ? Randleman
6b. 6c. 6d. 6e. 6f. 6g.
Buffer impact
number - Reason Buffer Zone 1 impact Zone 2 impact
Permanent (P) or for Stream name mitigation (square feet) (square feet)
Temporary T impact required?
131 ?P?T ?Yes
? No
B2 ?P?T ?Yes
? No
B3 ?P?T Yes
?
6h. Total buffer impacts
6i. Comments:
D. Impact Justification and Mitigation
1. Avoidance and Minimization
1 a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project.
Stream impact No. S3 crosses the creek at an angle less than 75 degrees in order to avoid conflict with the existing 15"
sanitary sewer line on the east side of Brushy Fork Creek and connect to the proposed Wash Water Equalization Basin on the
west side of the creek.
The structures associated with stream impacs S1 and S2 are essential for the water treatment plant improvements but were
designed to minimize stream impacts as much as possible.
1 b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques.
In accordance with Contract Drawing B11 Note 3, the existing creek is to be intercepted and bypassed around stream impacts
S2 and S3 such that no water flows through any distrubed area until construction of these facilities is complete. Rip-rap
stabilization per Detail CS on Sheet B36 is shown for these structures to protect the stream-bank during and after
construction.
12. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State
2a. Does the project require Compensatory Mitigation for ? Yes ® No
impacts to Waters of the U.S. or Waters of the State?
2b. If yes, mitigation is required by (check all that apply): ? DWQ ? Corps
? Mitigation bank
2c. If yes, which mitigation option will be used for this
project? ? Payment to in-lieu fee program
? Permittee Responsible Mitigation
3. Complete if Using a Mitigation Bank
3a. Name of Mitigation Bank:
3b. Credits Purchased (attach receipt and letter) I Type I Quantity
Page 8 of 12
PCN Form - Version 1.3 December 10, 2008 Version
pC
pizzagalli
construction company
July 7, 2009
1247 S. Martin Luther King Jr. Drive
Winston Salem, North Carolina 27107
Telephone [phone]
Fax [phone]
Mr. Jeff Davis
Black and Veatch International
8520 Cliff Cameron Drive, Suite 210
Charlotte, NC 28269
(704)-510-8440
(704)-510-0211 fax
Re: RA Thomas Water Treatment Plant Improvements
Winston-Salem, NC
PC Project # 12806
Subject: NCDENR Letter Dated June 24, 2009
Dear Mr. Davis:
This letter is in regards to the Section 401 Water Quality.Certification Application and specifically how Pizzagalli
Construction Company plans to construct the pipelines and structures located in the stream channels onsite. All work
will be performed in the dry. In order to provide a dry area PCC intends to set up a temporary by-pass pump system to
divert the flow of the creek around the new construction. We intend to use both electric pumps and diesel powered dri-
prime pumps. The pumps will be sized in order to maintain the flow of the creek Currently we plan to use a 3"
electric pump and a 4" diesel powered pump with other pumps available as needed. After the pumps are set up and
ready we will install an upstream temporary cofferdam. We will construct this by first pushing sheet piles into the
creek to completely block flow off from our construction area, next we will cover the sheet piling with dirt and rip rap
in order to help support the temporary cofferdam. Next we will set the suction lines of our dewatering pumps into the
wet side of the new cofferdam and pump this water continuously around the construction area. We will also construct
a small cofferdam on the downstream side of the construction area to prevent water from backing up in the
construction area. After the bypass pump system is operational we will set a pump to dewater the stream channel in
between our two cofferdams. After all water has been removed we will start excavating for the new pipe or structure.
Upon completion of the structure and restoration of the stream channel inside the cofferdam area we will then remove
the downstream cofferdam and then remove the upstream cofferdam. Then we will remove our temporary bypass
pumps and restore the remaining area of the stream channel. During all this work we will provide adequate erosion
control practices to prevent sediment from entering the stream or leaving the site. We will also use stone check dams
with our dewatering in order to prevent erosion also. Please let us know if you have any questions or concerns.
Sincerely,
Brian Walker
Project Manager
cc: PC Correspondence File
12806 NCDENR Letter 6.14-09.doe
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