20150112 Ver 1_More Info Received_20150317 (2)

Strickland, Bev
From: Devane, Boyd
Sent: Tuesday, March 17, 2015 10:46 AM
To: Strickland, Bev
Subject: Please file this in: Country Meadows -King NC- DWR #15 -0112
Attachments: 15- 12536. Low. Density .Design.Guidelines.3.17.15.pdf
From: Harris Gupton [mailto:hgupton auptonco.com]
Sent: Tuesday, March 17, 2015 10:10 AM
To: Devane, Boyd
Cc: Bryon Hobson
Subject: Country Meadows Subdivision -King NC
Boyd
I just ran accross the attached design parameters that were received along
with the Low Density Supplement form from Sue Homewood @WQ Regional office.
These say the same thing that you and I have agreed were a proper solution.
In any event now that we have a direction Bryon is preparing all the required computations,
forms and other information needed for your approval. It may take a couple of days
to get all this together but at least we a headed to completion.
Once we have everything together, we will send you a complete package including the
latest maps and etc.
Thank You Again for Your Assistance.
Harris
Harris B. Gupton, PE, PLS
Gupton & Webb, PA
PO Box 1070
King, NC 27021
Phone (336)- 985 -6519 or (336)- 723 -2459
Fax: [phone]
Cell (336) 705 -0633
Email: hqupton .quptonco.com

(g) Curb Outlet Systems. Projects that meet the low density provisions of Rules .1005
through .1007 of this Section may use curb and gutter with outlets to convey the
stormwater to grassed swales or vegetated areas prior to the runoff discharging to
vegetative filters or wetlands. Requirements for these curb outlet systems are as follows:
(1) The curb outlets shall be located such that the swale or vegetated area can carry
the peak flow from the 10 year storm and the velocity of the flow shall be non - erosive;
(2) The longitudinal slope of the swale or vegetated area shall not exceed five
percent, where practicable;
(3) The side slopes of the swale or vegetated area shall be no steeper than 5:1
(horizontal to vertical). Where this is not practical due to physical constraints, devices to
slow the rate of runoff and encourage infiltration to reduce pollutant delivery shall be
provided;
(4) The minimum length of the swale or vegetated area shall be 100 feet; and
(5) In sensitive areas, practices such as check dams, rock or wooden, may be
required to increase detention time within the swale or vegetated area.