20201862 Ver 1_Pre-Filing Meeting Request_20201202

ID#* 20201862
Version* 1
Regional Office* Winston-Salem Regional Office - [phone]
Reviewer List* Sue Homewood
Pre -Filing Meeting Request submitted 12/2/2020
................................................................................................................................................................................................................................................................................................................
Contact Name * Carrie Caviness, PhD
Contact Email Address*
Project Name*
Project Owner*
Project County*
Owner Address:
Carrie. Caviness. 1 @gmail.com
Walker Dam Maintenance
Sally B Reynolds, Trustee
Watauga
Street Address
519 Brookside Drive
Address Line 2
aty
Boone
Fbstal / Zip Code
28607
Is this a transportation project?* r Yes r No
State / Province / Region
NC
Country
USA
Type(s) of approval sought from the DWR:
W 401 Water Quality Certification - F 401 Water Quality Certification -
Regular Express
r- Individual Permit r- Modification
r- Shoreline Stabilization
Does this project have an existing project ID#?*
r Yes r No
Do you know the name of the staff member you would like to request a meeting with?
Sue Homewood or staff
Please give a brief project description below.

The Walker Pond (-0.1 ac surface area) is an on-line pond located
on an intermittent portion of Hardin Creek (C) (10-1-5). The pond was
constructed some time in the 1960s. Geotechnical investigation
shows the dam was constructed of poorly suited materials (stony
loam) excavated to create the pond. There are currently three areas
of leakage through the dam. The pond riser is clogged and
undersized as are the two 4" emergency spillway pipes with
inadequate freeboard. Scour and owner information indicates
overtopping has already occurred on at least one occasion in the
past 24 months. Additionally, the pond has infilled since its creation
leading to storage volume issues. Residential structures are located
in close proximity downstream of the pond.
This project proposes slowly dewatering the pond to the sediment
layer using siphon/pump and pipe to an adequately sized dewatering
(diversion) basin over the winter 2020/2021 prior to generally rainy
spring and early summer months. The geotechnical engineer
involved with the project anticipates dam failure is likely in the near
future. The owners are proceeding with design and estimates for
reconstructing the dam or abandoning reconstruction and proceeding
with stream restoration (-125'). The subsequent PCN for this project
will be modified with reconstruction plans under NW3 (GC4132) or
modified to a NW27 (GC4134).
Please give a couple of dates you are available for a meeting.
12/7/2020
12/8/2020
12/9/2020
Please attach the documentation you would like to have the meeting about.
Overview Map - Walker Pond.pdf 3.21 MB
NC DWQ Stream Identification Form Hardin
1.38MB
Creek upstream pond.pdf
NC DWQ Stream Identification Form Hardin
1.37MB
Creek —downstream pond.pdf
pdf only
By digitally signing below, I certify that I have read and understood that per the Federal Clean Water Act Section
401 Certification Rule the following statements:
• This form completes the requirement of the Pre -Filing Meeting Request in the Clean Water Act Section 401 Certification
Rule.
• I understand by signing this form that I cannot submit my application until 30 calendar days after this pre -filing
meeting request.
• I also understand that DWR is not required to respond or grant the meeting request.
Your project's thirty -day clock started upon receipt of this application. You will receive notification regarding meeting location
and time if a meeting is necessary. You will receive notification when the thirty -day clock has expired, and you can submit an
application.
Signature
(rr� try c 0
Submittal Date 12/2/2020

PIN:2911214840000
Sally B Reynolds, trustee
519 Brookside Drive
�2.26 acres
Deed Bk 1968, Page 799
Legend
0 Walker Pond
Walker —Property
- - - Hardin Creek
- watergclass
nc_watauga_parcels_poly
. �y
in. f i
Dewatering
Basin
t�F
f�.
NCDEQ Stream Class Layer,
Stream Does Not Occur Here
PROJECT OVERVIEW MAP 'f
Walker Dam Dewatering
Hardin Creek (C)
Stream ID Upstream
Hardin Creek (C)
Stream ID Downstream
alker Pond
0.1 acres_
0 50 100 150 200 ft
All data displayed is publically available and
was obtained from NCOnemap and Watauga Co. (2020)
excluding the Hardin Creek (as rendered by C.C.)

NC DWQ Stream Identification Form Version 4.11 Upstream of Pond
Date: 11/23/2020
Project/Site: Walker Dam
Latitude: 36.223778
Evaluator: Carrie Caviness
County: Watauga
Longitude:-81.670044
Total Points:
Stream Determination (circle one)
Other
Stream is at least intermittent 25
Ephemeral ntermitten Perennial
e.g. Quad Name: Boone
if >_ 19 or perennial if >_ 30`
A. Geomorphology (Subtotal = 13 )
Absent
Weak
Moderate
Strong
1a. Continuity of channel bed and bank
0
1
3
2. Sinuosity of channel along thalweg
0
1
CD
3
3. In -channel structure: ex. riffle -pool, step -pool,
ripple -pool sequence
0
1
(2)
3
4. Particle size of stream substrate
0
1
CD
3
5. Active/relict floodplain
0
2
3
6. Depositional bars or benches
0
(Z)
2
3
7. Recent alluvial deposits
CD
1
2
3
8. Headcuts
0
CD
2
3
9. Grade control
0
.5
1
1.5
10. Natural valley
0
0.5
1
05
11. Second or greater order channel
No CD
Yes = 3
a artificial ditches are not rated; see discussions in manual
B. Hydrology (Subtotal = 6 )
12. Presence of Baseflow
0
1
CD
3
13. Iron oxidizing bacteria
CD
1
2
3
14. Leaf litter
1.5
1
0
15. Sediment on plants or debris
Q
0.5
1
1.5
16. Organic debris lines or piles
0
OD
1
1.5
17. Soil -based evidence of high water table?
No = 0
Yes
C. Biology (Subtotal = 6 )
18. Fibrous roots in streambed
3
Q
1
0
19. Rooted upland plants in streambed
3
Q
1
0
20. Macrobenthos (note diversity and abundance)
0
1
(2)
3
21. Aquatic Mollusks
0
1
2
3
22. Fish
0
0.5
1
1.5
23. Crayfish
0
0.5
1
1.5
24. Amphibians
0
0.5
1
1.5
25. Algae
0
0.5
1
1.5
26. Wetland plants in streambed
FACW = 0.75; OBL =
1.5 Other = 0
'perennial streams may also be identified using other methods. See p. 35 of manual.
Notes: Snails, caddisfly cocoon structures,
2 Ma fls -> 5 rocks
Sketch:
Culvert
across
BrooksideDr
Pond
Sampling Area

NC DWQ Stream Identification Form Version 4.11 Downstream of Pond
Date: 11/23/2020
Project/Site: Walker Dam
Latitude: 36.223385
Evaluator: Carrie Caviness
County: Watauga
Longitude: _81.669803
Total Points:
Stream Determination (circle one)
Other
Stream is at least intermittent 20.75
Ephemeral ntermitten Perennial
e.g. Quad Name: Boone
if >_ 19 or perennial if >_ 30`
H. koeomorpnology (SUDtotal = u )
Absent
Weak
Moderate
Strong
1a. Continuity of channel bed and bank
0
1�
2
3
2. Sinuosity of channel along thalweg
0
Cp
2
3
3. In -channel structure: ex. riffle -pool, step -pool,
ripple -pool sequence
0
C)
2
3
4. Particle size of stream substrate
0
1
CD
3
5. Active/relict floodplain
0
2
3
6. Depositional bars or benches
QO
1
2
3
7. Recent alluvial deposits
CD
1
2
3
8. Headcuts
CD
1
2
3
9. Grade control
0
.5
1
1.5
10. Natural valley
0
0.5
1
05
11. Second or greater order channel
No CD
Yes = 3
a artificial ditches are not rated; see discussions in manual
B. Hvdroloav (Subtotal = 7 1
12. Presence of Baseflow
0
1
2
3�
13. Iron oxidizing bacteria
CD
1
2
3
14. Leaf litter
1.5
1
0
15. Sediment on plants or debris
0
0.5
1
1.5
16. Organic debris lines or piles
CD
1 0.5
1
1 1.5
17. Soil -based evidence of high water table?
No = 0
Yes
C. Biology (Subtotal = 5.75 )
18. Fibrous roots in streambed
3
2
Q
0
19. Rooted upland plants in streambed
3
2
CD
0
20. Macrobenthos (note diversity and abundance)
0
1
2
21. Aquatic Mollusks
0
1
2
3
22. Fish
0
0.5
1
1.5
23. Crayfish
0
0.5
1
1.5
24. Amphibians
0
0.5
1
1.5
25. Algae
0
0.5
1
1.5
26. Wetland plants in streambed
FACW OBL =
1.5 Other = 0
'perennial streams may also be identified using other methods. See p. 35 of manual.
Notes: Snails, caddisfly cocoon structures, numerous mayfly and stonefl s on 5 rocks
Sketch:
Sampling Area
Walker
Pond
Stream lacks
a defined channel;
more of a seepage gravel bed
for-75-100' below dam