20120561 Ver 2_More Info Received_20120710

Strickland, Bev
From: Homewood, Sue
Sent: Tuesday, July 10, 2012 9:13 AM
To: Strickland, Bev; Dennison, Laurie
Subject: FW: cottages of Boone
Attachments: site1 -rev 7- 3- 12.pdf; SH cover Itr026.pdf; site 1 detail rev 7- 3- 12024.pdf; Site 2 detail rev
070312.pdf; Site 2 impact map rev. 7- 3- 12.pdf; Site 2 LF Weir detail 070512.pdf
For file 12 -0561 please
Sue Homewood
NC DENR Winston -Salem Regional Office
Division of Water Quality
585 Waughtown Street
Winston - Salem, NC 27107
Voice: (336) 771 -4964
FAX: [phone]
E -mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.
From: John Vilas [mailto:john(a)env- ecs.com]
Sent: Saturday, July 07, 2012 7:08 PM
To: Homewood, Sue
Cc: 'McCormick, Tasha L SAW'
Subject: RE: cottages of Boone
Sue,
See attached files for response to comments below. Hard copies mailed Monday.
Thanks,
John Was
ENV -ECS, Inc.
3764 Rominger Rd.
Banner Elk, NC 28604
ph: 828 - 297 -6946
fax: 828 - 297 -1982
john o env - ecs.com
From: Homewood, Sue [ mailto :sue.homewood()ncdenr.aov]
Sent: Friday, June 22, 2012 4:25 PM
To: John Vilas
Cc: McCormick, Tasha L SAW
Subject: cottages of Boone
Hi John,
Happy Friday afternoon.

I have reviewed the PCN for the DWQ 401/NW12 permit forth is project and have a few item that I will need:
• I need a plan sheet that shows the alignment of the dual pipes at both impact sites. I can't tell if you intend
baseflow to go through both pipes, or if the second pipe will be offset /raised /have a sill to ensure baseflow only
goes through one pipe and stormflow accesses both pipes. We would require the latter unless there's
justification for sending baseflow through both pipes. I don't remember either stream being big enough to
warrant that.
Can you provide a detail for the stream stabilization below Impact Site #2. If you are going to put boulders in
the stream (which I agree is completely justified) we need to see a detail to show its going to be done naturally
and won't be considered additional impact. You can call it a step /ladder, or boulder drop sequence or whatever
but provide something that shows it'll be similar to what we'd see in a steep natural stream.
If you can provide these in the next couple weeks I can avoid sending a formal "hold letter' until about 7/5 or so. If
you'd rather have a formal letter to provide to your client, that's no problem, I will happily send one out, just let me
know.
Thanks
Sue Homewood
INC DENR Winston -Salem Regional Office
Division of Water Quality
585 Waughtown Street
Winston - Salem, INC 27107
Voice: (336) 771 -4964
FAX: [phone]
E -mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.

FJ1V6=une11d C011S11wil ling Senftm Inc.
July 7, 2012
Ms Sue Homewood
NC DENR DWO
Winston Salem Regional Office
585 Waughtown St.
Winston Salem, NC 27107
RE: Cottages of Boone - Utility Line Access Road, USACE ID 2012 -00428
Boone, Watauga County, NC
Response to Comments sent by email 6-22 -2012
Dear Sue:
3764 Rominger Road
Banner Elk, NC 28604
Ph: 828 - 297 -8948
Fax: [phone]
e -mail: john @env- ecs.com
Enclosed is the requested information regarding the two piped crossings for the referenced
project. There are 5 sheets:
1. Impact Site 1: Revised plan view showing location of low flow weir.
2. Impact Site 1: Detail showing cross section of low flow weir, pipe countersink, and grade
control log.
3. Impact Site 2: Revised plan view showing a location of low flow weir and downstream
stabilization and natural boulder velocity check.
4. Impact Site 2: Detail profile view showing step -pool boulder structure below pipe outlet
and boulder headwall/bank stabilization.
5. Impact Site 2: Detail showing cross section of low flow weir.
The proposed plan at both crossings is for low flow weirs instead of raising the high flow pipe. This
is due to the minimum cover condition of the proposed pipes at both locations. Raising one of the
pipes would result in less than two feet of cover over the pipes, which is not desirable.
If you have any questions regarding this information or need additional information please call me
at 828 - 297 -6946 thank you.
Sincerely,
John, -C. Was
President, ENV Environmental Consulting Services Inc.
Cc: Mark Brooks
Tasha McCormick
Amanda Wallis

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o Planning• Engineering • Surveying •EnvlmnmentalServi— 2q'f WATAUGA COUNTY NORTH CAROLINA
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Cottages Of Boone
Access Road PCN
mpcct Site #1 Detci
July 2, 2012

Impact
Site
#2
Detail
A
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Law
Flow weir
View
A
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Boulder Dissipator Notes:
1. Use mix of boulder sizes from 1' to 4' mean diameter
2. Boulders to be keyed into streambed so as not
to change the natural stream gradient.
Rock Headwall Notes:
1. Contractor shall coordinate with Project Engineer
on design, rock size and condition.
Low Flow Weir Notes:
1. Use boulders with mean diameter of 1.0 — 2.0 feet
placed around high flow pipe to height of 1.0 feet
above invert.
Existing
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" Pipe
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osed Boulder
Dissipator
—20 —15 —10 —5 0 5 10 15 20
Boulder Dissipator Notes:
1. Use mix of boulder sizes from 1' to 4' mean diameter
2. Boulders to be keyed into streambed so as not
to change the natural stream gradient.
Rock Headwall Notes:
1. Contractor shall coordinate with Project Engineer
on design, rock size and condition.
Low Flow Weir Notes:
1. Use boulders with mean diameter of 1.0 — 2.0 feet
placed around high flow pipe to height of 1.0 feet
above invert.

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