20240486 Ver 1_AddInfo Received_20240418

Homer, Seren M
From:
Adam Williams <[e-mail]>
Sent:
Thursday, April 18, 2024 9:15 AM
To:
Fuemmeler, Amanda J CIV USARMY CESAW (USA); Leslie, Andrea J
Cc:
David Pedersen; Homer, Seren M; Melanie Carter
Subject:
RE: [External] Pigeon Roost Pond Site - Watauga Co.
CAUTION: External email. Do not click links or open attachments unless verified. Report suspicious emails with the Report Message button
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Hello Amanda,
Additional stream impact needs to be added to the PCN — when I met out with the owner's representative (about a year
ago) there was a recently installed culvert that was not permitted and needs to be included as an after -the -fact impact.
It is shown as a 24" HDPE CPP on your plan just downstream of the stream enhancement work. Please clarify the length
of this impact and the need for this crossing. No problem, we will add this to the impact table, assuming the online
PCN portal lets me edit it post submittal.
For the wetland impact (W1— 0.017 acre) associated with the extension of the auxiliary spillway and rock -lined outlet
channel protection — would recommend/support shortening pipe and removing outlet protection from wetland thereby
avoiding this impact. Please confirm if this change can be made and modify plans accordingly. This shouldn't be a
problem, we will work on this and get you a revision that shows the ES outlet occurring prior to the wetland.
Cold water release - would also recommend/support installation of cold water release. Please confirm if this change can
be made and modify plans accordingly. See below, our riser detail. We propose using this gate valve as the cold water
release. The opening is 7 feet below the top of the riser and can be adjusted based upon time of year. The client 100%
wants this concrete riser system, which our engineer designed. The landowner furthermore mentions that this pond
outlet tends to release much less/any flow in times of late summer drought. This gate valve system can be adjusted to
release cold water in times of high or low flow. Let me know your thoughts...?
Once I hear back from you, we can make these changes in the plans. Thanks,

.RISER SPILLWAY
Top Trash Rae
Handwheel x �
Riser Tap
Eli.-4078.{
Steno Guide IF
R i ser Acres s Staii rs
Gate 8tevr� 4(18" spacing)
Riser Section,
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Barrel 4" CMP with
Drainage lining; InvGrt: 40692
Gate Valve
Invert: 4,071.0 Base Section,
El: 4066.0' Concrete Foolei
Y t Y Y H T T f
Adam Williams, PWS
Brushy Fork Environmental Consulting, Inc.
10565 Highway 421 South
Trade, Tennessee 37691
ph: 423.727.4476
cell: 828.773.3820
www.bfec.org
"Whether you think you can, or you think you can't --you're right." - Henry Ford
57 Stone
Bedding
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From: Fuemmeler, Amanda J CIV USARMY CESAW (USA) <[e-mail]>
Sent: Wednesday, April 17, 2024 11:24 AM
To: Leslie, Andrea J <[e-mail]>; Adam Williams <[e-mail]>
Cc: David Pedersen <[e-mail]>; Homer, Seren M <[e-mail]>
Subject: RE: [External] Pigeon Roost Pond Site - Watauga Co.
Adam,
I wanted to follow up with my comments in addition to (and piggybacking on) Andrea's comments and your responses:
Additional stream impact needs to be added to the PCN — when I met out with the owner's representative (about a year
ago) there was a recently installed culvert that was not permitted and needs to be included as an after -the -fact impact.
It is shown as a 24" HDPE CPP on your plan just downstream of the stream enhancement work. Please clarify the length
of this impact and the need for this crossing.
For the wetland impact (W1— 0.017 acre) associated with the extension of the auxiliary spillway and rock -lined outlet
channel protection — would recommend/support shortening pipe and removing outlet protection from wetland thereby
avoiding this impact. Please confirm if this change can be made and modify plans accordingly.
Cold water release - would also recommend/support installation of cold water release. Please confirm if this change can
be made and modify plans accordingly.
Amanda Jones
828-271-7980 ext. 4225
From: Leslie, Andrea J <[e-mail]>
Sent: Tuesday, April 16, 2024 12:23 PM
To: Adam Williams <[e-mail]>
Cc: Fuemmeler, Amanda J CIV USARMY CESAW (USA) <[e-mail]>; David Pedersen <[e-mail]>;
Homer, Seren M <[e-mail]>
Subject: [Non-DoD Source] RE: [External] Pigeon Roost Pond Site - Watauga Co.
Hi Adam -
Thank you for the responses. On #3. I do not believe that water will be sufficiently cooled off by
running 167 ft; solar radiation can significantly raise the water temps in a pond of this size, and
there are wild trout in this watershed. Coldwater release structures are simple and cost-effective.
We would like this to be a part of the design.
Andrea
Andrea Leslie
Mountain Habitat Conservation Coordinator

NC Wildlife Resources Commission
645 Fish Hatchery Rd., Building B
Marion, NC 28752
828-803-6054 (office)
828-400-4223 (cell)
www.ncwildlife.or
18+ f io
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From: Adam Williams <[e-mail]>
Sent: Wednesday, April 10, 2024 2:28 PM
To: Leslie, Andrea J <[e-mail]>
Cc: Fuemmeler, Amanda J CIV (US) <[e-mail]>; David Pedersen <[e-mail]>; Homer, Seren M
<[e-mail]>
Subject: RE: [External] Pigeon Roost Pond Site - Watauga Co.
CAUTION: External email. Do not click links or open attachments unless verified. Report suspicious emails with the Report Message button
located on your Outlook menu bar on the Home tab.
Hello Andrea,
Here are your questions and our responses:
1. Looks like you are proposing to send any drainage from a new auxiliary spillway into the
wetland. This doesn't seem appropriate - as drainage will then change the hydrology of the
wetland, increasing the wetland impacts from the project beyond those proposed. Can this
be shunted to the stream instead? We are proposing to send the (rarely accessed/used
only in times of high flow) emergency spillway pipe down toward the lower stream,
which has riparian wetlands on it because of 0.5% proposed slope. The current
spillway ALREADY discharges into this wetland, just in a different location (alongside
of the driveway), which has an even lower slope (<0.1%). To reduce the effects of the
spillway discharge, we can daylight the pipe earlier and extend the rock lined channel
in order to dissipate more energy prior to entering the wetland area. Re-routing to
Pigeonroost Creek would require another 475 feet of pipe with multiple bends (around
house). This would be poor engineering, cost prohibitive, and a maintenance
nightmare.
2. Will you pump all flows heading into the pond around the pond during dredging, pond
regrading, and riser/outflow structure rehab? Yes, we plan to pump flows heading into
the pond during construction, as required for concrete work and pipe retrofit. Pond
water will be pumped into a settling basin and allowed to filter through grass field
prior to discharge into any receiving stream.
3. Can you install a coldwater release into the new riser/ drain structure? I've attached a
schematic as an example. The water released from the riser travels 167 feet, so it is
anticipated that any increases in surface water temperature would be offset before
reaching the receiving stream. Due to the small size of the pond and seepage flow as
the water source, estimated inflow is less than 0.5 cfs. This would require a smaller
size orifice (<2 inches), which would be prone to clogging and difficult to maintain.
Let me know if you have any questions. Thank you,
4

Adam Williams, PWS
Brushy Fork Environmental Consulting, Inc.
10565 Highway 421 South
Trade, Tennessee 37691
ph: 423.727.4476
cell: 828.773.3820
www.bfec.org
"Whether you think you can, or you think you can't --you're right." - Henry Ford
Rn
6
From: Leslie, Andrea J <[e-mail]>
Sent: Tuesday, April 09, 2024 11:11 AM
To: Adam Williams <[e-mail]>
Cc: Fuemmeler, Amanda J CIV (US) <[e-mail]>; David Pedersen <david@bfec.o g>; Homer, Seren M
<[e-mail]>
Subject: RE: [External] Pigeon Roost Pond Site - Watauga Co.
Importance: High
Hi Adam -
I'm trying to understand the setting here, and I have a few questions:
1. Looks like you are proposing to send any drainage from a new auxiliary spillway into the
wetland. This doesn't seem appropriate - as drainage will then change the hydrology of the
wetland, increasing the wetland impacts from the project beyond those proposed. Can this
be shunted to the stream instead?
2. Will you pump all flows heading into the pond around the pond during dredging, pond
regrading, and riser/outflow structure rehab?
3. Can you install a coldwater release into the new riser/ drain structure? I've attached a
schematic as an example.
Thanks,
Andrea
Andrea Leslie
Mountain Habitat Conservation Coordinator
NC Wildlife Resources Commission
645 Fish Hatchery Rd., Building B
Marion, NC 28752
828-803-6054 (office)
5

828-400-4223 (cell)
www.ncwildlife.or
f d
-41
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From: Adam Williams <[e-mail]>
Sent: Wednesday, March 27, 2024 11:28 AM
To: Leslie, Andrea J <[e-mail]>
Cc: Fuemmeler, Amanda J CIV (US) <[e-mail]>; David Pedersen <[e-mail]>
Subject: [External] Pigeon Roost Pond Site - Watauga Co.
CAUTION: External email. Do not click links or open attachments unless verified. Report suspicious emails with the Report Message button
located on your Outlook menu bar on the Home tab.
Hello Andrea,
Here is a dropbox link (Amanda I realize you cant open this just wanted to make you aware we submitted via PCN portal today)
to the referenced project site:
https://www.dropbox.com/scl/fi/blwrwxkaz5ltvn5ototz5/Pigeonroost Combined PCN Reduced. Combined PCN Reduced ?rlkey=u73fgviy9zvcklddepr
sni ijggArJI=n
This is a project that involves:
• An existing pond retrofit,
• Small section of stream enhancement,
• Wetland impacts from driveway shoulder filling (for safety reasons).
Thanks,
Adam Williams, PWS
Brushy Fork Environmental Consulting, Inc.
10565 Highway 421 South
Trade, Tennessee 37691
ph: 423.727.4476
cell: 828.773.3820
www.bfec.org
"Whether you think you can, or you think you can't --you're right." - Henry Ford
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