20190857 Ver 1_More Info Received_20190820

Strickland, Bev
From: Dodd, Brady N -FS <[e-mail]>
Sent: Tuesday, August 20, 2019 11:55 AM
To: Annino, Amy M; Fuemmeler, Amanda J CIV (US)
Subject: [External] RE: DWR 20190857 Swannanoa Creek Stream Enhancement - Additional
Information Request
Attachments: SwannanoaCrk_Proposed_LongPro_CrossSectns.pdf
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Hi Amy,
Please find attached the additional information requested for the processing of the 401 WQC. Please let me know if
more is required.
Thank you,
Brady
Brady Dodd
Forest Hydrologist
as Forest Service
low National Forests in North Carolina
p:828-257-4214
c:828-620-3176
bradv.doddOusda.aov
160 Zillicoa Street
Asheville, NC 28801
www.fs.fed.us
KI
Caring for the land and serving people
From: Annino, Amy M [mailto:[e-mail]]
Sent: Friday, August 2, 2019 5:06 PM
To: Dodd, Brady N -FS <[e-mail]>; Fuemmeler, Amanda J CIV (US) <[e-mail]>
Subject: DWR 20190857 Swannanoa Creek Stream Enhancement - Additional Information Request
The Division of Water Resources (DWR) has performed a review of a 401 Water Quality Certification application dated
June 25, 2019 and received by DWR on June 25, 2019, with the appropriate fee received on July 3, 2019, for the above
referenced project. The DWR has determined that your application is incomplete and cannot be processed. The
application is on -hold until the following information is received:

1. For each proposed structure type (cross vane, J -hook vane, and log vane), provide a proposed longitudinal
profile and a proposed typical cross-section with dimensions. Provide justification for the proposed channel
dimensions based on reference reach information or stable dimensions upstream and downstream of the
impact area. [15A NCAC 02H .0506 (b)]
Pursuant to Title 15A NCAC 02H .0502, the applicant shall furnish all of the above requested information for the proper
consideration of the application. If all of the requested information is not received within 45 calendar days of receipt of
this email, the DWR will be unable to approve the application and it will be returned. The return of this project will
necessitate reapplication to the DWR for approval, including a complete application package and the appropriate fee.
Contact me if you have any questions or concerns.
Regards,
Amy Annino
Environmental Specialist —Asheville Regional Office
Water Quality Regional Operations Section
NCDEQ — Division of Water Resources
828 296 4656 office
amy.annino(cancdenr.gov
2090 U.S. Hwy. 70
Swannanoa, N.C. 28711
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Proposed Typical Cross Sections
and Longitudinal Profile for
Proposed Structures
(Including Regional Cures)
Swannanoa Creek Stream Enhancement Project
Grandfather Ranger District, NFsNC
Submitted by: Brady Dodd, NFsNC Hydrologist

Regional Curve Estimates:
Drainage Area = 2.6 miles2
Bankfull riffle cross-section area = 38.8ft2
Bankfull discharge (cfs) = 199.6cfs
Bankfull mean depth — riffle = 1.47ft
Bankfull width = 26.4ft
CROSS SECTIONS
New Channel Dimensions:
Bankfull Width = 26.0'
Bankfull Max. Depth = 2.0'
Bankfull Mean Depth = 1.5'
Cross Section - Typical RIFFLE @ Boulder J -Hook, Cross Vane, & Log Vane Structures
98.00
99.00
100.00
TERRACE ELEVA '10N
101.00
102.00 W nVa n
103.00
104.00 ~
105.00
106.00
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
00 Oi O '4 N ( i .4 L ii 117 ed Qi O 4 cJ l i a L i tD 1_� cd O] O �4 ! 4 M V Uf 16 N
N N N N N N N N N M /+1 (�1 l�1 l�'1 l�1 m m m m V V Q V a ✓1 �l �l
—t+Proposed +Existing

Cross Section - Typical RIFFLE to POOL Conversion @ Boulder Cross Vane Structures
llV Vv O o O O o o O O o o O o O O o O O o O O O O o O O O O o O O o Q 4 4 O O O O O O o
N M a ✓1 Ic 1 00 m O 1 mOl O N m -4 r• m Ol O '-I N M R li l Lo r --X Ol O N
M M m m M M M M M a Q V Q Q Q a a ✓1 �/1 �/1
—t—Proposed Existing
Cross Section - Typical RIFFLE to POOL Conversion @ Boulder J -Hook & Log Vane Structures
96.00
98.00 �-T
1oo.00 '
-
Newankf II EI vatn
1oz.00
BANK MASHED
104.00 '— -- 1 DOWN BN EXCAVATOR
1
106.00
108.00 4w...
--t-77—
------ -- -- -- �—
ST UC REL CATION
110.00 —
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o a o 0 0 0 0 0 0 0 0 0 0 0
N m Q i1] t0 I� m dt O '-I N m V u'I tO h o0 QI O N m a ut lJ r� o0 m O .--I N m Q uY tU h o0 m O r -I N
rl rl rl ry ry ry ry ry N N N N N N N �� N N m m m m m m m M M M a Q Q Q Q Q Q Q a vt YY W
—t—Proposed +Existing
New Pool Dimensions:
Bankfull Width: 26.0'
Bankfull Max. Depth: 6.5'
Bankfull Mean Depth: 4.0'

96.00
98.00
100.00
102M
104.00
106.00
108.00
110 00
Cross Section - Typical RIFFLE to POOL Conversion @ Toewood Revetment Structure
--
DOWN B EXC VAT R
TRU TUR LOC TION
0 0 0 0 0 0 0 0 0 0 0 0 0 0 o a o a o a o 0 0 o a o 0 0 00 0 0 0 0 0 0 0 0
N m V LA cU h a0 Q1 O .--I N m V Ln 10 h a0 O1 O N m a m 'O h w m O '-I N m a vi tU Ih W Qi O rl N
ri ri ri �i rl �i rl rl N N N N N N N N N N m m m m m m m m m m V -t R V V V V a a LI Ln Ln
Proposed +Existing

100.00
101.00 _
102.00
103.00
104.00
105.00
105.00
107.00
108 00
LONGITUDINAL PROIFILE
Pool Dimensions (From Upstream Reference Reach):
Pool length Lpool (includes run & glide): 24 - 36'
Pool length ratio (Lpool/Wbkf): 0.96 —1.44'
Pool -to -pool spacing, p -p: 51— 84'
Pool -to -pool spacing ratio, (p-p/Wbkf): 2.04 — 3.36'
Longitudinal Profile - Typical @ Boulder J -Hook Vane, Log Vane, Toewood, & Cross Vane Structures
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o 0 0 0 0 0 0 0 0 0 0
CSI fY1 V �]
WD rh 90 O1 O '-i fV S�'1 V U1 fh 90 O] O X17 f` 00 O] O ti fV � h 00 Qi o ti N
M N N N N N N N N N N m m m m m m m m m m o a a �fl ll'I ll1
t— Proposed � Existing
-------------------------------- ----------- ------------ ----- ----- -------------------------------------------------------- B --------------------
nkfull Elevation
`RurPool
Glide
10
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 o 0 0 0 0 0 0 0 0 0 0
CSI fY1 V �]
WD rh 90 O1 O '-i fV S�'1 V U1 fh 90 O] O X17 f` 00 O] O ti fV � h 00 Qi o ti N
M N N N N N N N N N N m m m m m m m m m m o a a �fl ll'I ll1
t— Proposed � Existing

Blue Ridge Ecoregion 66: Estimated Bankfull Discharge
1000
N
v
^V,
\W
L
s
v
C
3
Y
C
CO 100
GJ
M
W
10
0.1 1.0 10.0 100.0
Watershed Drainage Area (mit)
O
p
•
'
s
••
O
Regression: NC + TN
y = 96.1X0.765
'
RZ=0.94
•'�
O•'
O
.
O
O
'•
O
••
O
,• O
•�
•�
O
O
O

t-
100.0
10.0 10.0
1.0
Blue Ridge Ecoregion 66: Bankfull Riffle Width
M
I M
FReem gor e sIs i lonl: INIC T N
41M
��■■��III�A�3�iillil'��■■��III�
0
0X111111■
111111■
�■■�IIIII�■■VIII
�■■�IIIN�
vlllllllvlllll
■�IIIIIN■
0.1 1.0 10.0
Watershed Drainage Area (mil)
100.0

Blue Ridge Ecoregion 66: Bankfull Riffle Mean Depth
10.0
O
Regression: NC + TN O
y = 1.10x0.301 O
R2 = 0.93 O
O
o .•Q �
a '
1.0
Y
C
m Q
m
0.1
0.1 1.0 10.0 100.0
Watershed Drainage Area (mit)