20200859 Ver 2_MINOR change_20220224

Strickland, Bev
From: Boone, Kelly <[e-mail]>
Sent: Thursday, February 24, 2022 6:28 PM
To: Johnson, Alan; Steve Kichefski
Subject: [External] RE: Construction Method Revision for DWR 20-0859 / SAW-2018-01144
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Hi Alan and Steve,
Last fall I contacted DWR and USACE about a proposed change in construction method for a pond crossing for the Union
County Yadkin Regional Water Supply - Finished Water Transmission Main project (DWR 20-0859 / SAW-2018-01144).
After discussion with Alan, and with Bryan Roden -Reynolds, we proceeded with the proposed construction method. The
contractor lowered the water level and used a soil/stone mat to install the pipe rather than using a cofferdam. This
worked well on the pond crossing, and that has been restored. The contractor has requested the same construction
method for another open -water crossing (Lake Twitty). We had originally proposed an open -water crossing using a
cofferdam for this crossing in the design/permit plans, but would like to change this method to use a soil/stone
causeway to install the pipe. The impervious dike/stream pump -around would still be used for the crossing of the
channel part of the lake crossing.
The work area is on Sheet C-36 of the permitted plans. The limits -of -construction are not changing, so the impact area is
exactly the same as what was permitted. It's just the method that is a little different.
Do you have any concerns with allowing the contractor to use this construction method across the lake?
Please let me know if you need additional information or have questions.
Thanks,
Kelly
Kelly R. Boone, PE, PMP I CDM Smith 15400 Glenwood Avenue, Suite 400
Raleigh, NC 27612 I T/F: 919.325.3508 I [e-mail] I cdmsmith.com
From: Boone, Kelly
Sent: Monday, October 25, 2021 3:38 PM
To: [e-mail]
Subject: Construction Method Revision for DWR 20-0859
Hi Alan,
Per our discussion this afternoon —
The contractor for the Union County Yadkin Regional Water Supply - Finished Water Transmission Main project is
proposing a change to the originally permitted method of construction for a stream crossing a pond. The permit for this
project is DWR# 20-0859. The location is off Roanoke Church Rd near Hillcrest Church Rd in Union County. The impact
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number from the 401 WQC permit is OW5, and the permitted impact is 0.106 ac (temporary). The plan sheet is
attached. The original plans showed a construction method using a portable cofferdam such as a Portadam, within the
40-foot easement. However, the pipeline contractor has requested to not use a Portadam, but to instead lower the
water in the pond to dewater the work area, and would install the pipe in the same location as proposed using a
stone/soil mat for the equipment. The contractor obtained permission from the landowner to lower the water in the
pond.
Please let me know if this presents any problems. Based on our discussion, my understanding is that you are OK with
this. I also talked to Bryan Roden -Reynolds of USACE on the phone today and he was OK with this change of construction
method. The contractor has also discussed this method change with the DEMLR inspector who has been to the site.
Please let me know if you have questions or need additional information.
Thanks,
Kelly
Kelly R. Boone, PE, PMP I CDM Smith 15400 Glenwood Avenue, Suite 400
Raleigh, NC 27612 I T/F: 919.325.3508 I [e-mail] I cdmsmith.com
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