SW6100601_SHWT Info_20100625

Randall, Mike
To: cmillis
Cc: [e-mail]
Subject: RE: Request for additional information
Thanks, attached is a pdf copy of the permit. Originals and approved plans will go out today.
Mike Randall
From: cmillis [mailto:[e-mail]]
Sent: Friday, June 25, 2010 10:57 AM
To: Randall, Mike
Cc: [e-mail]
Subject: RE: Request for additional information
Per USDA information, the approximate seasonal depth to water table is 192 cm (6.3 ft) [see attached]. Our designed PP
is at el. 180.50. The grade across the site varies (el. 187-182), but in no case could the seasonal water table be above
our PP elevation. As a result, please find our design a sufficient since we will not be draining wetlands, lowering the water
table, or discharging below the existing natural outfall for the site. Thanks for your time and please contact me if you have
any further questions. Have a good weekend.
CHRIS MILLIS, Pr
PARAMOUNTE
,1 N O . 111. 11 " . n. 6.. N G
PARAMOUNTE ENGINEERING, INC
591 1 Oleander Drive, Suite 201
Wilmington, NC 28403
OFFICE: (91 0) 791 -6707
FAX: [phone]
www.paramounte-eng.com
From: Randall, Mike [mailto:[e-mail]]
Sent: Friday, June 25, 2010 10:20 AM
To: cmillis; William B. Fuller Jr. ([e-mail])
Subject: Request for additional information
I have reviewed the application for Lot 2, Airport Commerce Park. Looks good, except for failing to provide the Season
High Water Table (SHWT).
1) In the case of adjacent wetlands, the Permanent Pool (PP) must be set within 6" of the SHWT to avoid draining
them off through the pond.
2) In the case of a high SHWT, and no adjacent wetlands, the PP should be set as close as possible to the SHWT,
3) Where that isn't possible, the temporary pool should be set using the SHWT elevation as the baseline. This allows
for the potential of the SHWT elevation to remain above the PP, without affecting the pond's ability to store the
minimum required design storm.
Please provide the SHWT.
Mike Randall