Pecan Hollow Add-CS 900509Jerry Parch Consulting Engineers
May 9, 1990
Mr. Gary Sieb
Planning Director
City of Coppell
P O Box 478
Coppell, Texas 75019
214/471-2251
RE: JP No 88009; Pecan Hollow Subdivision;
[, Texas
Dear Mr. Sieb:
In response to your ~ :y regarding the status of
issues under discussion between Pecan Hollow and ABQ Development
Corporation concerning the drainage channel which lies along the
north boundary of Pecan Hollow, enclosed is a copy of my letter
of May 4, 1990 to ABQ. This letter was provided prior to the May
8, 1990 City Council review of the Pecan Hollow Final Plat.
The enclosed provides our review of the channel improvement
alternatives proposed by Pecan Hollow and confirmation that the
proposed channel widening and 4:1 south sideslope will be
constructed by the developer. Also we confirmed that the
developer will construct headwalls at the discharge ends of storm
sewers that conform to the proposed channel sideslope.
It is my understanding that the Pecan Hollow Final Plat received
City Council approval last night with the condition that ABQ and
Pecan Hollow came to an agreement on this channel issue. The
council approval was also conditioned on the addition to the plat
of a minimum of fifteen foot drainage easement in the rear of
lots 1-10, Block C, in Pecan Hollow for the channel. This
easement will be dedicated to the City and maintained by the
homeowners or the homeowners association. Please advise me
whether this understanding is correct.
It should be pointed out that the flow width under design flow
conditions in the proposed channel will extend approximately 23-
25 feet onto the aforementioned lots, or approximately 10 feet
past the proposed drainage easement limits. The City Council
indicated that the City engineering staff will address this
issue. Steps must be taken to prevent encroachments into this
ten feet of channel area, that is outside the fifteen foot
drainage easement, in order that the flow carrying capacity of
the entire channel is maintained. The optional channel design
analyzed by Pecan Hollow's engineers, which will limit the spread
of flow to a fifteen foot width on the lots in Pecan Hollow,
requires additional construction beyond that which is proposed by
the developer.
320 Westway Place, Suite 501 · Arlington, Texas 76018 · Metro (817) 467-2418 · (817J 465-0259
Mr. Gary $ieb May 9, 1990
JP No. 88009 Page 2 of 2
I have requested that the developer's engineer provide two copies
of the Final Plat of Pecan Hollow, with revisions as directed by
the council shown, two copies of the proposed channel cross
sections, and a copy of the channel construction plans to our
office. I appreciate the cooperation the City has extended to us
in this matter and request that this cooperation be continued
through the review of the channel plans, preparation of the final
plat to be recorded with the county and preparation of agreements
and easements.
If you have any questions, please call.
Sincerel~
erry Parche' ,
JP:ch
Enclosure: Copy of Letter to ABQ Development Corporation
dated May 4, 1990
CC:
Ms. Mary Hicks/ABQ Development Corporation
Mr. Wayne Ginn, P.E./Ginn, Inc. w/enclosures
Mr. Steve Goram/City of Coppell w/enclosures
Mr. Bill Anderson/Dan Dowdey & Associates
Mr. Doyle Cameron/Dalterra Development
Mr. Jim Schell/haw, Snakard & Gambill