ST8805-CS 880617dP Jerry Parch Consulting Er neers
June 17, 1988
Ns. Maryetta Cunninghem
Federal Emergency Management Agency
800 N. beep 288
Denton, Texas 76201-3698
817/898-9284
RE:
JP No. 88009; Flood Plain Analysis, Parks
of Coppell; Denton Creek and Cottonwood
Branch; Coppell, Texas
Dear Ns. Cunningham:
Our firm is serving as engineering consultants to AB9 Development
Corporation of Albuquerque, Hew Mexico on property they have
recently purchased in Coppell, Texas. Portions of the property
lie in the flood plains of Denton Creek and Cottonwood Branch,
Pursuant to my telephone conversation with Mr. Chris Ulsh of
Dewberry and Davis, Inc. (Phone No. 703/849-0374) on June 16,
1988 end in order to proceed with preparation of development
plans for this site in accordance with FBHA requirements, !
request that the Federal Emergency Management Agency provide us
with the following information.
Existing and most current hydraulic models including output
data, of the i0, 50, 100 and 500 year flood plains and the
lO0-year floodway on Denton Creek from the confluence with
Cottonwood Branch upstream to Grapevine Lake. The models'
furnished to'us should contain discharges, and water surface
elevations that FEHA will utilize to evaluate any proposed
flood plain modifications in this reach. It is my
understanding that a portion o£ the analysis of Denton Creek
in this reach is in the City of Lewisville Flood Insurance
Study.
Existing and most current hydraulic models, including output
data, of the 10, 50, 100 and 500-year flood plains and the
100-year floodway in Cottonwood Branch from the confluence
with Denton Creek upstream to Bethel Road, The models
furnished to us should contain discharges and water surface
elevations that FENA will utilize to evaluate any proposed
flood plain modifications in this reach. '
6001 W. Interstate 20, Suite 209, LB 32 · Arlington, Texas 76016 * Metro 18171 572-3458 · 18171 561-2101]
Ms. Meryet~a Cunningham
~P No. 88009
June 17, 1988
Page 2 o£ 2
®
Work maps showing cross section locations and alignments
utilized in the hydraulic models, stream stationie~ and 100-
year flood plain and floodway limits, and 500-year flood
plain limits within the reaches of Cottonwood Branch and
Denton Creek previously described.
Thank you for your prompt attention to this matter.
any questions, please cell.
Sincerely~
er~y Parche', P.E.
you have
JP:ch
CC:
Jay Chester, P.E./ABQ Development Corporation