ST9905-CS050121:~u~n~:a~lor R~'Corp-pl:Je'~-~ Drainag~cal~iaiiOns
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"Loretta Mokry" <loretta@apaienv.com>
<staylor@ci.coppelLtx.us>
1/21/20o5 9:13:12 AM
Re: Corp Permit - Drainage Calculations
Suzan,
Received three drainage plans sheet from you, but you mentioned four. Have one of the engineers in our
Austin office reviewing the previous HEC-RAS runs and she has been able to pull some of the information
I need from it. She developed a map of the RAS X-section locations to coordinate with the table of RAS
output so I will use the flow rate and velocities for developed for the point of the creek channel where we
plan to stop now. I forwarded her the drainage plans you sent me and she will try to run the model with
the flows Keith develops for the 1.5-2 year storm event. She is also going to try to work on the sediment
balance for me. Could Keith come up with a mean annual stream flow? I will try to get some info from the
Dallas County soil survey for estimating bed padicle sizes and/or sediment loads.
Hope to be able to pull this together by mid week next week.
Loretta
Loretta E. Mokry
Senior Environmental Scientist
Alan Plummet Associates, Inc.
10060 N. Dowling Rd.
College Station, Texas 77845
(979) 694-7619 home office
(817) 845-3280 cell
(979) 694-7619 fax (call first)
Through Fort Worth office
(817) 806-1700
(817) 589-0072 FAX
<loretta@apaienv.com>
www.apaienv.com
>>> "Suzan Taylor" <staylor@ci.coppeli.tx.us> 01/19/05 02:06PM >>>
Loretta:
I tried sending four plans sheets showing earlier calculations for the
drainage area. The file was to large to deliver to you so I am sending
the plan sheets one at a time.
1. Hogan & Rasor - (1980) improvements to Esters Road
2. Royal Lane - (1989) these plans include the concrete channel
constructed along Royal and on the south of Bethel
3. Minyards
4. Koll Development
Keith is working on the 2-year flow this afternoon - hopefully we can
have something for you soon. Have not received anything from
TranSystems yet.