20061804 Ver 5_Staff Comments_20130222

e,
Lucas, Annette
From: Lucas, Annette
Sent: Friday, February 22, 2013 2:51 PM
To: Higgins, Karen
Cc: Smith, Cherri L
Subject: 06- 18045 The Village at Flowers Plantation — DIFFUSE FLOW CONDITION
Attachments: 06- 18045 The Village at Flowers Plantation — DIFFUSE FLOW CONDITION.docx
Diffuse flow condition attached.
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. Lucas(@,,ncdenr.gov
Website: httQ// portal.ncdenr.org/web /wq /swylws /401
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06- 1804v5 The Village at Flowers Plantation — DIFFUSE FLOW CONDITION
AML comments
February 22, 2013
1. Diffuse Flow Plan Approval by DWQ
a) The SMP approved by the DWQ consists of three level spreaders and all associated stormwater
conveyances, inlet and outlet strictures, and the grading and drainage patterns depicted on plan
sheets dated June 29, 2011 and September 27, 2012, which are incorporated by reference into this
approval and are enforceable by DWQ provided however that any modification of the design for
the stormwater management system that is accepted by DWQ shall take precedence over the
original plans and specifications.
b) The maximum allowable drainage areas and built upon areas for the approved level spreaders
shall be in accordance with the table below. Any changes to these maximum areas shall require
the applicant to submit and receive approval for a revised stormwater management plan by the
DWQ.
c) The footprint of all stormwater management devices as well as an additional 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.
d) Maintenance activities for the level spreaders shall be performed in accordance with the notarized
O &M agreements signed by Ms. Rebecca Flowers (Owner) on December 19, 2012. The O &M
agreement must transfer with the sale of the land or transfer of ownership /responsibility for the
BMP facility. DWQ must be notified promptly of every transfer.
e) 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 /swp /ws /401 /certsandpermits /apply /forms).
Maximum drainage area
(square feet
Maximum built upon area
(square feet
Levels reader 1
7,841
3,920
Levels reader 2
231,304
62,452
Levels reader 3
63,991
16,988
c) The footprint of all stormwater management devices as well as an additional 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.
d) Maintenance activities for the level spreaders shall be performed in accordance with the notarized
O &M agreements signed by Ms. Rebecca Flowers (Owner) on December 19, 2012. The O &M
agreement must transfer with the sale of the land or transfer of ownership /responsibility for the
BMP facility. DWQ must be notified promptly of every transfer.
e) 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 /swp /ws /401 /certsandpermits /apply /forms).