Loading...
HomeMy WebLinkAboutRe Fox RunAmanda, I will do a 10, 25 and 100 year calculation and send that to you. Thanks for your help; John In a message dated 11/6/2012 11:24:49 A.M. Eastern Standard Time, abader@harnett.org writes: Can you please send photos of the existing drainage way and perform a channel analysis to demonstrate that the drainage from Fox Run has no adverse effect on adjacent properties for the 100 year storm. I do not think the drainage way exists anymore. You can pipe through Trotter’s Ridge with the appropriate drainage easement. From: Coachjwh@aol.com [mailto:Coachjwh@aol.com] Sent: Tuesday, November 06, 2012 11:19 AM To: Amanda Bader Subject: Re: Fox Run Amanda; The storm water released from Fox Run is allowed to run overland along the existing drainage way. We are not allowed to pipe across someone else's property. I have sized the Trotters Ridge pipes to handle the future development of Fox Run. Please advise if I am not understanding your concerns and I will make sure we address it. Thanks; John In a message dated 11/6/2012 10:59:37 A.M. Eastern Standard Time, abader@harnett.org writes: How are you going to get the flow from Fox Run to the storm drainage in Trotters Ridge? It will require a conveyance system. It appears you will need to pipe the water through a drainage easement to connect to the drainage system in Trotters Ridge. From: John Harris [mailto:coachjwh@aol.com] Sent: Monday, November 05, 2012 5:25 PM To: Amanda Bader Cc: John Harris Subject: Re: Fox Run Amanda; we will provide you with our calculations for the trotters Ridge storm systems downstream from Fox run. this will show you that we have accounted for the increase in flow. I have already left the office but I will pull up those calculations tomorrow and get them to you by afternoon. it may be late but I will get it to you. Thanks John Sent from my iPhone On Nov 5, 2012, at 5:10 PM, Amanda Bader <abader@harnett.org> wrote: John – The increase in stormwater runoff for the 10 year storm is 29% and the increase in stormwater runoff for the 25 year storm is 35%. This is more than the 10% threshold referenced in the ordinance. A downstream analysis must be provided. You must demonstrate the adequacy of conveyance structures downstream of the discharge points. How are you going to route the runoff from Fox Run through Trotter’s Ridge into its storm conveyance system? Thanks Amanda From: Coachjwh@aol.com [mailto:Coachjwh@aol.com] Sent: Monday, November 05, 2012 4:42 PM To: Jay Sikes; Amanda Bader Subject: Fox Run Jay; The attached is a copy of the Final DRB comments. I have provided responses in blue for the short range comments. The Long Range comments will be addressed at the Construction Plan stage. I will be bringing the plans to you in the morning after I vote, but wanted you to get these responses as soon as possible. I think we have all our ducks in a row. Amanda; I am including a Storm water Statement report for you to review. Please let me know if you have any concerns. Please also note that I did the design for both this (Fox Run) and the adjacent subdivision, Trotters Ridge. We did account for the fully developed upstream conditions of Fox Run when we did the storm water design on Trotters Ridge. Therefore there are no adverse affects of this project on the downstream development. There are no other structures within the lower basin down to the 10% point. Thanks; John John W. Harris, P.E. Consulting Engineer (919) 789-0744 www.HarrisEng.net <http://www.harriseng.net/>