20031023 Ver 1_More Info Recieved_20040227

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imap://danny.smith%40dwq.denr. ncmail.net @ cros.ncmail.net:143/fe...
Subject: RE: Martin Marietta Materials Rocky Point
From: <Harlan. Britt@ ki mley-horn.com>
Date: Fri, 27 Feb 2004 10:39:23 -0500
To: <[e-mail]>
CC: <[e-mail]>, <[e-mail]>, <[e-mail]>,
<horace. will son@ martinmarietta.com>, <[e-mail]>
Danny, I need to refer you to the Tech Memo dated February 26 located in Tab 2.
When the modeling was performed for Tract E, we did not have the soil parameter database information
from the NRCS for Murville soils. The Corp agreed for us to use conservative estimates of parameters in
the model. The modeling results for Tract B,C,& E indicated the ditch influences as shown on page 2 of
the memo to be 300 feet for interior ditches and 400 feet for roadside ditches.
After the initial modeling for Tract B,C, &E was completed and prior to the modeling for Tracts F1, F2, &
G2 we obtained the soil parameter database information from the NRCS. Using this database, developed
specifically for DRAINMOD by the NRCS, the model was run with results for Tracts F1,F2, being 500 feet
for interior ditches and 550 feet for roadside ditches. Please refer to page 3 of the February 16, 2004 Tech
Memo.
Summary- If the NRCS database had been used in Tract E then the model would have resulted in greater
ditch influences than was used in working with the Corp to reach their JD position as reflected in the
signed JD map for Tracts B, C, & E. Using the correct NRCS database information the model predicted a
ditch influence, which when applied to Tracts F1 and F2 yields the very small polygons outside of the ditch
influence as discussed in the Tech Memo. We believe there is a clear argument that these small polygons
were not wet and therefore no wetlands existed in F1 and F2 during any time in 1999.
Please contact me immediately if you need further clarification or information.
I will respond to John Dorneys request for verification of the Dec. 1999 JD tear sheet as soon as possible
under a separate email.
-----Original Message-----
From: Danny Smith [mailto:[e-mail]]
Sent: Thursday, February 26, 2004 10:33 AM
To: Britt, Harlan
Cc: Rick Shiver; Noelle Lutheran
Subject: Re: Martin Marietta Materials Rocky Point
Harlan,
I need some clarification.
In MMM's response dated February 17, 2004, (Item 2., Feb. 16, 2004 Technical Memorandum) it
was explained that the DRAINMOD model output results (agree to by the USACE) for tract E
were respectively: 300 feet of influence for interior ditches and 400 feet from roadside ditches
For tract F1 (A-D), it was explained that the DRAINMOD model outputs were 500 feet for
interior ditches and 550 feet for roadside ditches.
Tracts E and F1 are immediately adjacent, these tracts are mapped as Murville soils in the soil
1 of 2 2/27/2004 1:10 PM
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survey, and these tracts would have had the same inputs. Please clearly explain this discrepancy
between the DRAINMOD model ouputs for F1 and E. (Note: I applied the outputs from tract E to
tract F and calculated approximately 16 acres that are beyond influences of the ditches.)
thanks for your help.
danny
[e-mail] wrote:
Danny and Noelle: just wanted to see if you had received the information last Thursday and if so
have you had a chance to review the material. Please let me know if you have any questions and
so we can address them promptly. Anything that we can do via email or phone to save time
compared to letter writing will be greatly appreciated.
Thanks for your help,
Best regards,
Harlan
Harlan K. Britt, P.E.
Kimley-Horn and Associates, Inc
P.O. Box 33068
Raleigh, North Carolina 27636-3068
[phone]
harlan.britt@ kimley-horn.com
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[:/1 Drainage Map/Ditch Influence - Tract F1, F2, G2 Martin Marietta Materials
2-16-2004 Rocky Point Quarry Expansion
Rocky Point, North Carolina