20191327 Ver 1_BMP Outlet Mark Up_20191108

Strickland, Bev
From:Aliisa Harjuniemi <[e-mail]>
Sent:Friday, November 8, 2019 7:07 AM
To:Johnson, Alan
Cc:Shaeffer, David Leigh (Dave) CIV USARMY CESAW (USA)
Subject:\[External\] Re: Skybrook!
Attachments:Eastfield BMP Outlet Mark Up.pdf
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Alan,

See below the engineer's response in red. Would this work?

1. No real issues about the impact, but I do have a question concern about the location of the SW
bmp. Since all storm water will be diverted below the headwater of the stream, it is likely that the stream
could be affected. They should look and see about locating a bmp at the top of the stream (above the
road crossing). Or provide some clarity as to the potential loss of ground/overland flow to the channel.
- The BMP cannot be relocated from the location shown. The BMP needs to be located at the lowest part of the
site from a flood routing perspective. The overall intermittent stream would see overland flow during rain
events and that will still be the case after the proposed impacts (marginal impacts to the existing stream). We
can modify the outlet structure and pipe location leaving the BMP so that it daylights and drains to a point
further upstream.

Thanks,
Aliisa

On Fri, Oct 25, 2019 at 12:05 PM Johnson, Alan <[e-mail]> wrote:
I went by today! Anyway, walked the site. No real issues about the impact, but I do have a
question concern about the location of the SW bmp. Since all storm water will be diverted
below the headwater of the stream, it is likely that the stream could be affected. They should
look and see about locating a bmp at the top of the stream (above the road crossing). Or
provide some clarity as to the potential loss of ground/overland flow to the channel.

No need for next week’s site visit.

Thanks,
Alan
1

Alan D Johnson – Senior Environmental Specialist
NC Dept. of Environment & Natural Resources (NCDENR)
Division of Water Resources - Water Quality Regional Operations
610 East Center Ave., Suite 301, Mooresville, NC 28115
Phone: [phone] Fax: [phone]

E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
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--
Aliisa Harjuniemi, PWS
Project Manager
Carolina Wetland Services, Inc.
550 E. Westinghouse Boulevard
Charlotte, NC 28273
Direct: 980-259-1222
Office: 704-527-1177
www.cws-inc.net
2

DWR
Dm awa,,R. ,me