20221671 Ver 1_More Info Requested_20230105

DocuSign Envelope ID: 5C98EDF2-1A27-46F3-8C17-80FDB1AD78E5
ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
NORTH CAROLINA
Environmental Quality
January 5, 2023
DWR #20221671
Buncombe County
Town of Woodfin
Attn: Adrienne Isenhower
90 Elk Mountain Road
Woodfin, NC 28804
Delivered via email to: [e-mail]
Subject: REQUEST FOR ADDITIONAL INFORMATION
Woodfin Riverside Park
Dear Ms. Isenhower:
On December 1, 2022, the Division of Water Resources (Division) received your application requesting
an Individual Water Quality Certification from the Division for the subject project. The Division has
determined that your application is incomplete and cannot be processed. The application is on -hold
until all of the following information is received:
1. If the U.S. Army Corps of Engineers (USACE) requests a response to any comments received as a
result of the Public Notice, please provide the Division with a copy of your response to the USACE.
2. Staff from the Division attended a pre -application meeting on April 21, 2022, regarding the subject
project at which time several documents were provided including a PowerPoint presentation
entitled 20220415 Interagency Meeting Presentation and a memo dated April 20, 2022 regarding
Fish Passage Specifications for Woodfin Wave Whitewater Park (memo). The Division received an
update to the memo dated August 2, 2022. Among other things, the PowerPoint summarizes
modeled velocities and shear stresses within the French Broad River associated with the wave
feature under various flow regimes. Neither the memo, nor the results of the modeling, were
included with the application. Please confirm the information provided in the referenced documents
is applicable to the current design and/or summarize the results of any further model/design
refinement that was incorporated into the final design and that varies from the aforementioned
documents.
3. Please provide a French Broad River stage/discharge monitoring and contingency plan to be
implemented during in -river construction activities. The plan should include a protocol to monitor
weather and river stage and/or discharge and provide for contingencies should a high discharge
event occur. The plan should include details on the design discharge for the cofferdam and actions
to be taken should a flow event that exceeds the height of the cofferdam occur.
GDE
NORTH C OLI JA '
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North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11611 Mail Service Center I Raleigh, North Carolina 27699-1611
919.707.9000

DocuSign Envelope ID: 5C98EDF2-1A27-46F3-8C17-80FDB1AD78E5
Town of Woodfin
DWR #20221671
Request for Additional Information
Page 2 of 3
4. The Division accounts for impacts to streams in length. Please revise the Wave and Bypass Impact
Table to include impact lengths.
5. The Site Plan Sheet L1.3 calls for a Mud Play Area within the unnamed tributary (UT) of the French
Broad River. It's not clear what the Mud Play Area entails. Please provide a narrative description and
any applicable design plans for the Mud Play Area, including how water quality standards will be
maintained and how the stream will be protected from degradation so that the Division can
adequately review and determine whether the project will cause or contribute to a violation of
water quality standards and/or comport with the state's antidegradation policy.
6. Please provide additional design/construction details, including proposed cross -sections, for the
upstream river access and bank stabilization; the whitewater wave, bank treatment, and beach; and
the boulder toe and downstream boat ramp. The design details should include the shape and form
of the wave feature and bypass channel including boulder clusters, low -flow notch, etc. described in
the memo.
7. The Site Plan Sheet L1.3 has a call -out for a Boulder Toe Bank Stabilization to Double as River Access
feature. However, this feature is not included in the impact table, nor are construction details
provided. Please confirm this feature is to be constructed above the ordinary high water mark, or
include it in the impact table, provide justification for the feature, and provide construction details.
8. Please provide additional details regarding how the abandoned bridge pilings are attached to the
river bottom, what they are constructed of, and how they will be removed.
9. Sheet WWEC.4 indicates the upper river access and bank stabilization work will be constructed in
the wet. However, the WOTUS Impacts Narrative indicates the south access including boulder
toe/bank stabilization will be constructed by surrounding the area with a cofferdam and dewatering.
This area must be constructed in the dry. Please revise Sheet WWEC.4 to include details showing
how these features will be constructed while avoiding excavation in flowing water.
10. The typical cofferdam water control detail on sheet WWEC.6 appears to depict settling ponds
constructed outside of the cofferdam, but within the river footprint. Please revise the detail to
depict the settling ponds in an upland location.
11. The General Erosion & Sediment Control Notes note 4 on Sheet WWEC.6 indicates dewater pump
discharge from within the cofferdams will be discharged onto the floodplain away from wetlands
and construction activities. However, the details on Sheets WWEC.2, WWEC.3, and WWEC.5 appear
to depict the pump discharging directly to the river. Please confirm that the dewatered pump
discharge from all cofferdams will be pumped to an upland location and treated further prior to
discharge to the river. Please note energy dissipation measures may also be required prior to release
of water to the river. Please revise Sheets WWEC.2, WWEC.3, and WWEC.5 to depict the pump
discharge outlet in uplands or include a call -out on the plans that specifies this requirement.
12. Please describe the lifespan of the wave feature, any anticipated maintenance of the feature, and
how the maintenance will be conducted.
D_E
NORTH CARCLINA
gaparNrM of F,Mrnnmanfal quay
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11611 Mail Service Center I Raleigh, North Carolina 27699-1611
919.707.9000

DocuSign Envelope ID: 5C98EDF2-1A27-46F3-8C17-80FDB1AD78E5
Town of Woodfin
DWR #20221671
Request for Additional Information
Page 3of3
13. The project is subject to post -construction stormwater review under the Phase II Stormwater
Program. What entity will be reviewing the project for compliance with post -construction
stormwater requirements?
14. Please copy the Division on any response to the North Carolina Wildlife Resources Commission
comment letter dated January 4, 2023.
Pursuant to Title 15A NCAC 02H .0502(e), the applicant shall furnish all of the above requested
information for the proper consideration of the application. Please respond in writing within 30
calendar days of receipt of this letter by sending one (1) copy of all of the above requested information
to the 401 & Buffer Permitting Branch, 1617 Mail Service Center, Raleigh, NC 27699-1617 OR by
submitting all of the above requested information through this
link: https://edocs.deq.nc.gov/Forms/Supplemental-Information-Form (note the DWR# requested on
the link is referenced above).
If all of the requested information is not received within 30 calendar days of receipt of this letter, the
Division will be unable to approve the application and it will be denied as incomplete. The denial of this
project will necessitate reapplication to the Division for approval, including a complete application
package and the appropriate fee.
Please contact Andrew Moore at 828-296-4684 or [e-mail] if you have any
questions or concerns.
Electronic cc:
Sincerely,
DocuSigned by:
"-A43C72700BD543E...
Katie Merritt, Acting Supervisor
401 & Buffer Permitting Branch
Owen Carson, Equinox Environmental
Amanda Jones, USACE Asheville Regulatory Field Office
Andrea Leslie, NCWRC
DWR 401 & Buffer Permitting Branch file
D_E
NORTH CAROLINA
gaparhneM of Environment,/quay
Filename: 20221671 WoodfinRiversidePark Buncombe IP addinfo.docx
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 11611 Mail Service Center I Raleigh, North Carolina 27699-1611
919.707.9000