20140508 Ver 1_Emails_20140820

Burdette, Jennifer a
From: Burdette, Jennifer a
Sent: Wednesday, August 20, 2014 12:03 PM
To: 'James D. Gregory'
Cc: Kulz, Eric
Subject: RE: Conditions in Bob's channels
Raleigh, NC 27699 -1617
(919) 807 -6364 phone
0ennifer.burdette @ncdenr.gov
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From: James D. Gregory rmailto:wathydro reagan.coml
Sent: Wednesday, August 20, 2014 10:23 AM
To: Burdette, Jennifer a
Cc: Kulz, Eric
Subject: Fwd: Conditions in Bob's channels
Jennifer and Eric,
Rainfall Monday evening in the vicinity of Robert Slater's property at 204 Galway in Chapel Hill was about
0.5 -0.75 inches as recorded by several CoCoRaHS observers. I asked Phil Post to check the condition of the
channels late Tuesday evening and his report is below. Phil's report is of water discharging from drainage
systems into the upstream end of the main channel on Slater's property. But there is also discharge into the
channel farther downstream from the two house /lawn drainage systems at Slater's residence. In an earlier
message recounting the intensity /duration of the rainfall, Phil said that in his experience with substantial
rainfall, the golf course and house /lawn drains usually discharge for about 3 says. Then if irrigation restarts
soon after the rain, a trickle of flow from the drainage discharge points continues for several more days. Slater's
irrigation system applies so much excess water that the two discharge pipes for his drainage system have an
almost content trickle of discharge during rain free periods. So, that is the artificial hydrology situation in a
nutshell.
My preference is to go ahead with your evaluation of the streams on Thursday if there is not any more
substantial rainfall between now and then. I trust that with your experience, you can take into account the
anthropogenic inputs of water into the channel.
Many thanks, Jim

James D. Gregory, Ph.D., CPSS, PWS
COL (Ret) AVN, USA/ARNG
Principal /Senior Scientist
Watershed Hydrology Consultants LLC
1114 Upper Reach Drive, Wilmington, NC 28409
(m) 910 - 550 -4811
wathydroa- Reagan.com
www.wathydro.com
Professor Emeritus, Watershed & Wetlands Hydrology
Dept. of Forestry & Environmental Resources
North Carolina State University
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Begin forwarded message:
From: Phil Post <ppost(a)-ppaengineering.com>
Subject: Re: Conditions in Bob's channels
Date: August 19, 2014 at 8 :34 :00 PM EDT
To: "James D. Gregory" <wathydro(a)-reagan.com>
The 12 inch and the 4 inch under drain pipe are both flowing at 0.5 CDs at 8 pm tonight.
On the uphill side of the fairway, the foundation drain from the large house is flowing at about 0.5 CDs.
So out of the total water flowing onto Bob right now, about half comes from the under drain under fairway 46
and about half comes from the foundation drains from the large house just across the fairway and uphill from
Bob.
Phil
Philip N. Post, PE, PLS
Philip Post & Associates, Inc.
401 Providence Road, Suite 200
Chapel Hill, NC 27514
P: (919) 929 -1193
F: (919) 493 -6548
M: (919) 818 -7862
On Aug 19, 2014, at 6:38 AM, "James D. Gregory" <wathydro o,rea ag n.com> wrote:
Phil - I am headed out of town on a site visit for a client in the hinterlands of Onslow County. Will you please
check the conditions in Bob's channels late this afternoon and let me know. Many thanks. Jim