HomeMy WebLinkAbout20071556 Ver 2_More Info Received_20141017CLearWaLer
C1earWater Environmental Consultants, Inc.
October 15, 2014 www.cwenv.com
Ms. Karen Higgins
NC DWR, 401 & Buffer Permitting Unit
512 N. Salisbury Street, 9a` Floor
Raleigh, North Carolina 27604
RE: Big Ridge
Request for Additional Information
Jackson County, North Carolina
DWR # 07 -1556
Dear Ms. Higgins,
°CTI 720 ,4 0
Please reference the comments received on September 22, 2014 (Attachment A) sent by
the NC Division of Water Resources (DWR) in response to the Nationwide Permit
Application for the site known as Big Ridge. The DWR has several comments regarding
the proposed project. Each comment is discussed below.
DWR Comment: "Please provide details regarding culvert removal and modifications,
including:
a. Step to work in the dry.
b. Stream channel reconstruction.
Current impacts at Impact C2 are approximately 80 linear feet. The culvert is
overly wide in this location and can be reduced in length to 40 linear feet. As
requested, the work would be done in the dry. Sand bags would be placed across
the stream in an appropriate location upstream of the existing culvert. Water
would back up behind the sand bags and be diverted around the crossing location
via a black corrugated pipe. The pipe outlet would be downstream of the crossing
location. Once the stream segment is dewatered, fill covering the culvert would
be removed and the culvert would be shortened. The day - lighted stream banks
would be sloped back, matted, and seeded with a native seed mix (Figure 1).
Culvert removals at C9, CIO, and C 11 would be treated the same way.
Contractors would remove the culvert at C 11 first, followed by C 10, and then C9.
Approximately 60 linear feet of stream channel was relocated near the entrance of
the site. The stream would be put back into its original location. The
reconstructed stream channel would be constructed in the dry starting at an
existing riprap /soil berm to the existing culvert under Highway 107. The new
stream banks would be sloped back, matted, and seeded with a native seed mix
(Figure 1). Once the reconstruction is complete, the riprap berm would be
224 South Grove Street, Suite F
Hendersonville, NC 28792
828 - 698 -9800 Tel
828 - 698 -9003 Fax
Ms Karen,Higgms
10%15/2014
Page 2 of 3
removed to allow water to flow into the reconstructed channel and through the
existing culvert under Highway 107 to the Tuckasegee River.
c. Splash pool enhancement where pipes are perched, where appropriate.
Culvert outlet protection, in the form of splash rocks, would be placed below
perched culverts where appropriate if active erosion is occurring. Splash rocks
would be, stone large enough to withstand high water flows. Splash rocks would
be placed even with the culvert outlet so that water would cascade over the rock
and, into the;stream.
d. Measures to prevent sediment loss to stream and turbidity impacts."
Road cuts within the project area are stable and no longer contributing significant
sediment to stream channels on site. Sediment and erosion control measures (i.e.
silt ,fencing) will be utilized at areas proposed for construction and, any future
ground disturbance would be stabilized immediately with matting and seeding.
DWR Comment: "Water Quality Certification 3890 Condition 12 and ,Attachment A
require Stormwater Management planning, including the determination as to whether the
project is considered Low Density or High Density. No information has been provided to
meet this condition. Please provide the ,required details per Attachment, A for such a
determination and the stormwater management BMPs to be utilized."
At this time, Amazing Grace, LLC has no intention of developing the,property as a
,subdivision, The current project purpose is to provide access Ito three lots on the
property and resol've'the outstanding violation.
During an on -site meeting on September 12, 2014 with Chuck Cranford of DWR,
J
Mr. Cranford asked that the applicant estimate-the impervious surface area at the site,
if the residential development were to be complete. The Mount Wilderness project
area is comprised ,of approximately 360 acres. A site plan from 2007 proposes 74
lots ranging from approximately 1.5 -8.2 acres for an average lot size of 3.2 acres.
Potential house footprints are unknown; however, if a very liberal assumption is
made that an average of 10,000 square feet of impervious surface area would be
present on each, lot, that yields a total impervious surface area of 17 acres for the
project site. Impervious surface area would 'likely be much less; however, total
impervious surface percentage based on the assumptions above would be 4.7%. In,
this instance, the development would be considered low density.
Although additional development is not proposed at the site, should the site be
developed in the, future, stormwater runoff from built upon areas would be�
transported by vegetated conveyances or alternative BMPs designed in accordance
with the NC DWQ Stormwater Best Management Practices Manual and approved
by the DWR. No collection systems would be utilized at the site.
Ms Karen Higgms
10/15/2014
Page 3 of 3
The information submitted in this package addresses all issues set forth in the DWR
comment letter dated September 22, 2014. Should you have any questions or comments
concerning this project please do not hesitate to contact °me,at 828 - 698 -9800.
Sincerely,
Rebekah L. Newton R. Clement Riddle, P.W.S.
Project Biologist Principal
Big Ridge - Stream Matting and Sloping Detail
ANCHOR MATTING
IN 6" TRENCH
SMOOTH SURFACE,
REMOVE ALL DEBRIS
AND SEED /MULCH
BEFORE PLACING MATTING
Drawn by RL'N 10 14 14,,CEC Project# 742
= COCONUT STRAW MATTING PLACED FLUSH
WITH BANK SURFACE, LAP OVER
DOWNSTREAM /DOWN SLOPE SEAMS
12" WOOD STAKE PLACED,
IN 3' 0 C DIAMOND PATTERN
%MATTIN ACN'H'ORED 1'
% I BELOW STREAM BED
SECTION
0
0 05 1 2
Miles
Jackson County, tear Stream Matting
North Carolina =� and Sloping Detail
224 South -Grove Street, SuiteT Figure 1
Hendersonville. North Carolina 28792
Attachment A
DWR Comment Letter
(dated September 22, 20`14)
AEiAE � FILE-
NCDENR
North Carolina Department of'Erivironment and' Natural Resources
Pat McCrory
Govemor
September, 22,, 2014
Roseanne Giordani
Amazing Grace Properties, LLC
100 Congress Ave., Suite 1440
Austin, TX 78701
Subject: Request for Additional Information
Big Ridge
Dear Ms. Giordani:
John E. Skvarla, III
Secretary
DWQ Project # 07- 15566V2
Jackson County
The Division of Water Resources (Division) has performed a preliminary review of a 401 Water Quality
Certification application submitted for the above referenced project. The Division hasAetermined that,your
Application is incomplete and cannot be processed. The�applicatiou is on -hold until all of the following
information is received:
Provide details regarding,culvert removal and modifications, including:
• Steps to work in -the dry
• Stream channel re- construction (e.g., matting, vegetation, etc.)
• Splash pool enhancement where pipes are perched, where appropriate
• Measures to prevent sediment loss to streams and turbidity impacts
2. Water Quality Certification 3890 Condition 12 and Attachment,A require-Stormwater
Management planning,, including the determination as to whether the project is considered Low
Density or High Density. No information has been provided to meet this condition.
Please provide the required details per Attachment A for such a determination and the stormwater
management BMPS to be utilized.
If all of the °requested information is not received in writing within 30 calendar days of receipt of this letter, the
Division will be unable to approve-the application and it will`be returned. The return of this project will
necessitate reapplication to the Division for approval, including a complete application package and the ,
appropriate fee.
Please, respond in,writing within 30 calendar days of receipt of this letter by sending four copies of all of the
Above requested information the 401 & Buffer Permitting Unit:
Water Quality Regional Operations — Asheville Regional Office
2090 U.S. Highway 70, Swannanoa, North Carolina 28778
Phone: 828 - 2984500 FAX 828 -299 -7043
Intemet,hitpJlportii nodenr orglweblwq
An Equal Opportunity 1 Atffmrabve Action Employer
Roseanne Ciordani
September 22, 2014
Page 2,of 2
401 and Buffer Permitting Unit
1617 Mail Service Center
Raleigh, NC 27699 -1617
Please be aware that you have no authorization under the Section 401 of the Clean Water Act for this activity
and any work,done within waters of the state may be a violation of North Carolina,Geneml Statutes and
Administrative Code.,Please call Chuck Cranford (828) 296 -4650, if you have any questions.
Sincerely;
G. Landon Davidson, P.G., Regional Supervisor
Water Quality Regional Operations
Asheville _Regional' Office
cc: DWR WHICHRO 401 files
DWR -401 & Buffer Permitting Unit
ec: Rebekah Newton — Clearwater
David Brown - USACE
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