20071026 Ver 1_More Info Received_20070802

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Chandler Palmer Speight Engineers, P.A.
Site and Transportation Engineers
X621 Purfoy Road, Suite 201
Fuquay-Varina, NC 27526
(Phone)919-552-4845
(Fax) 919-552-6962
www.cpsengineerspa.com
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2-August-07
TO: Annette Lucas
NC Division of Water Quality
2321 Crabtree Blvd., Suite 250
Raleigh, NC 27604
919-715-3425
FROM: Bryon Palmer, PE
RE: WILLIAMS RIDGE SUBDIVISION
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DENR -WATER QUALITY
WETLANDS AND STDRMWATER BRANCH
We received your preliminary comments and have revised the plans accordingly. The following are
our responses to your comments:
Comment #1: Please provide an overall drainage map depicting all pipes along with topography.
Response: A map of the outlet drainage areas has been provided.
Comment #2: The Neuse buffer appears to be drawn from the centerline of the stream rather than
top of bank
Response: The buffer was originally taken from the top of bank. The top of bank line has been
shown on the plan.
Comment #3: Please explain why you have thick ground cover listed fora 55 foot Zone 1 vegetation.
This will mature to forested over the long term. Thus a weighted average of Zone 1
and Zone 2 vegetation types should be used.
Response: Per our meeting on 7-26-07 it was agreed that this was thick ground cover and the
level spreaders are ok as designed.
Comment #4: Please include construction sequencing and installation instructions for the level
spreader in your plans..
Response: The construction sequence on sheet C2.01 has been revised to clarify when level
spreader system should be installed.

Per our conversation on 7-26-07, I have removed Level Spreader #2 and show releasing the flow to the
wetland finger at non-erosive velocities. I investigated new locations for level spreaders but due to
topography no locations seemed practical. I have shortened the high flow bypass channel for Level
Spreader #1 to release to the wetland well outside the buffer at non-erosive velocities.
End of Comments
I trust this information will be sufficient for you to complete your review. Feel free to contact me if
you have any questions or concerns or if you require any additional information. Thank you for your
help with this matter.
Sincerely,
Bryon Palmer, PE
Attachments:
3 sets of revised plans
1 copy revised ditch calculations
1 copy drainage area delineation map