20052134 Ver 2_Staff Comments_20120916

Lucas, Annette
From: Lucas, Annette
Sent: Sunday, September 16, 2012 2.02 PM
To: Witherspoon, Lauren
Cc: Lucas, Annette
Subject: 05- 2134v2 Gates at Ethan's Glen SD — DIFFUSE FLOW CONDITION
Attachments: 05- 2134v2 Gates at Ethan's Glen SD — DIFFUSE FLOW CONDITION docx
LC,
It's attached — sorry to throw all this stuff at you at the same time. Just trying to get caught up so I can finish the
Permeable Pavement Chapter this month.
A
Annette M. Lucas, PE
Environmental Engineer
NCDENR I DWQ I Wetlands and Stormwater Branch
1650 Mail Service Center, Raleigh, NC 27699 -1650 (Mail)
512 N. Salisbury St, Raleigh, NC 27604 1 9th Floor (Location & Parcels)
Phone: [phone] Fax: [phone] Email: Annette Lucaspncdenr gov
Website• http: // portal .ncdenr.org /web /wq/swpfws /401
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05- 21342 Gates at Ethan's Glen SD — DIFFUSE FLOW CONDITION,
AML comments
September 16, 2012
1. Diffuse Flow Plan Approval
a. The diffuse flow plan approved by this office consists of three level spreader -
vegetated filter strips and all associated stormwater conveyances, the grading and
drainage patterns depicted on plan sheets dated September 10, 2012. The plans and
specifications for these devices approved by the DWQ are incorporated by reference
and are enforceable by the DWQ provided however that any modification of the
design for the stormwater management system that is accepted by the DWQ shall take
precedence over the original plans and specifications.
b. The footprint of the level spreader - vegetated filter strips and all associated drainage
devices as well as an additional ten (10) foot wide area on all sides of the devices
shall be located in either public rights -of -way, dedicated common areas or recorded
easement areas. The final plats for the project showing all such rights -of -way,
common areas and easement areas shall be in accordance with the approved plans.
c. The approved diffuse flow must be maintained in perpetuity in accordance with LS-
VFS operation and maintenance (O & M) agreements signed by Johnna Bircher (Vice
President, Development) on April 3, 2012. 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.
d. The applicant and /or authorized agent shall provide a completed Certificate of
Completion form to the DWQ within thirty (30) days of project completion (available
at http: / /portal.ncdenr.or web /wq /sM /ws /401 /certsandpermits /apply /forms).