20030669 Ver 2_Staff Comments_20110831

Lucas, Annette
From: Lucas, Annette
Sent: Wednesday, August 31, 2011 10:55 AM
To: Chapman, Amy
Cc: Lucas, Annette
Subject: 03-0669v2 Waterstone at Brier Creek - Diffuse Flow Condition
Attachments: 03-0669v2 Waterstone at Brier Creek - Diffuse Flow Condition.docx
Amy-
See attached.
Z
Annette M. Lucas, PE
Environmental Engineer
NCDENR DWQ Wetlands and Stormwater Branch
1650 Mail Service Center, Raleigh, NC 27699-1650 (tail)
512 N. Salisbury St, Raleigh, NC 27604 9thFloor (I,iwioi<?n (% Parcels)
Phone: [phone] Fax: [phone] Email: Nnncti, 11
Website http://portal.ncdenr.org/web/wq/swp/ws/401
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03-0669v2 Waterstone at Brier Creek - Diffuse Flow Condition
AML comments
August 31, 2011
Diffuse flow plan approval. The diffuse flow plan approved by this office consists of three level
spreaders and engineered vegetated filters strips and all associated stormwater conveyances, the
grading and drainage patterns depicted on plan sheets dated July 21, 2011. No changes to the
level spreader-vegetated filter strips shall be made without written authorization from the DWQ.
The diffuse flow devices shall have maintenance access and at least a 10-foot drainage easement
on each side to allow for the ability to maintain the structures, and to perform corrective actions.
The stormwater easements shall be recorded to provide protection of the structures from potential
alterations by future property owners. The approved diffuse flow must be maintained in
perpetuity in accordance with wet detention pond operation and maintenance (O & M)
agreements signed by Fred Hazel on August 1, 2011. The O & M agreements must transfer with
the sale of the property or transfer of ownership/responsibility for the BMP facilities. DWQ must
be notified promptly of every transfer.