CF-Pump Station-CS 810414HOGAN & RASOR,
Engineers · Planners · OonsulCanCs
April 14, 1981
Mr. William B. Stehling, P.E.
Engineering and Technical Services
Section
Texas Department of Water Resources
Stephen F. Austin Building
1700 North Congress Avenue
Po O. Box 13087, Capitol Station
Austin, TX 78711
Re: Waterworks Improvements
Coppell, Texas
Dear Mr. Stehling:
We are enclosing a copy of a letter prepared by our structural
engineers regarding the buoyancy of the proposed 0.50-M.G.
ground storage tank.
As noted in the attached letter, the water level of 446.0
(mean sea level elevation) was used to calculate the buoyant
forces since Mr. Everett Rowland indicated his information
shows this to be the 100-year flood elevation at the project
site. According to the Corps of Engineers' floodway map we
reviewed yesterday, the section taken near the project site
shows 100-year flood elevation to be approximately 443.0 feet
to 444.0 feet (mean sea level elevation).
As we discussed with you by telephone on April 14, 1981, we met
with the Corps of Engineers on April 15, 1981, for the purpose
of requesting their assistance in determining what effect the
proposed and future ground storage reservoirs will have on the
100-year flood elevation. The Corps indicated they would
perform this service for the City of Coppell upon their receiv-
ing a written request from the City. A letter requesting this
flood elevation analysis was prepared by the City and hand
delivered to the Corps of Engineers in Fort Worth, on April 14,
2730 Republic Bank Tower Dallas, Texas 75201 214/742-5811
Mr. William B. Stehling, P.E.
April 14, 1981
Page 2
1981, by Mr. James Elium, City Administrator.
Also, we met with Mr. Larry Buck, Ecologist, in the 404 Permits
Section of the Corps. Mr. Buck briefly reviewed the project
location from their soils and U.S.G.S. maps and indicated that
the site did not appear to be within their jurisdiction and,
thus, would not require a permit. Again, the City has prepared
and delivered a letter requesting the Permits Section to docu-
ment their comments.
Hopefully, the Corps can provide the flood elevation information
prior to the date of the Board meeting; however, they would not
commit to a specific time. In any event, we will keep you
advised as soon as we receive any information on this matter.
As you mentioned, perhaps the project can be recorm~ended to be
approved subject to a favorable report from the Corps on the
flood elevation analysis.
We do appreciate your concern and interest in this project and
look forward to visiting with you at the Board meeting on the
24th of.April.
Very truly
HOGAN & RAs'OR,/INC.
C. F//Rasor, P.E.
Exe~tive Vice President
CFR/ksg
cc: Mr. James R. Elium III, City Administrator
Enclosure