Pecan Hollow/FP-CS 900521May 21, 1990
Mr. Doyle Cameron
Pecan Hollow Joint Venture
16250 Dallas Parkway
Suite 200
Dallas, Texas 75248
RE:
Request for Drainage Easements from ABQ; Pecan Hollow
Development; Coppell Texas
Dear Mr. Cameron:
Pursuant to your request for three drainage easements on our
property in the Parks of Coppell which were received by our
engineer, Jerry Parche', on April 5, 1990, this letter is
provided in order to summarize our requirements prior to
processing the easement documents.
It is our understanding that your engineers have provided a
hydraulic analysis of two channel improvement alternatives.
These improvements will permit proposed filling for house pads on
Lots 1-10, Block C of Pecan Hollow while not increasing design
water surface levels in the adjacent channel. These alternatives
are described as follows.
Alternative No. 1 - Channel Wideninq and 4:1 Sideslopn
This alternative includes widening the channel bottom and
construction of a 4:1 sideslope on the south bank. The
following table provides the ~hannel bottom width and
location of the south sideslope at three cross sections
adjacent to Pecan Hollow, from information provided by your
engineer.
CHANNEL CROSS
SECTION
TOTAL BOTTOM
WIDTH
FT.
LOCATION OF TOE OF SOUTH
CHANNEL SIDESLOPE W.R.T.
PECAN HOLLOW PROPERTY LINE
19+50 29 6.5' NORTH
22+00 33 3.4' NORTH
24+50 34 2.5' NORTH
The 4:1 south sideslope can be extended upwards by filling
on a 4:1 slope, subsequent to the initial channel
excavation, at the option of the homeowner of builder.
Doyle Cameron
may 21, 1990
Page 2
Alternative No. 2 - Vertical Wall on South Sideslop~
Alternative No. 2 is established to provide homeowners of
builders an opportunity to extend the depth of their lot
above design channel flood levels as far north as possible.
This limit is located 15 feet south of the north property
line of Pecan Hollow. At this point, the homeowner can
construct a vertical wall, however the bottom of the wall
must be approximately only one foot above the channel bottom
elevation. The area between the wall and the property line
must then be excavated to provide conveyance area to offset
conveyance area lost due to filling behind (south of) the
wall, as shown on the cross sections.
Our engineer has reviewed computer models of both alternatives
described above and has no objections to either. We note,
however, in your letter to our engineer of May 2, 1990,
transmitting the computer models that you state that "the
builder/homeowner can create a 4:1 slope section within Pecan
Hollow." The channel bottom widening and 4:1 slope section in
Pecan Hollow is necessary to offset proposed filling for house
pads, which we understand will be performed by the developer.
Therefore, the channel improvements must be performed by the
developer in conjunction with filling for house pads.
In order to prevent any misunderstanding regarding proposed
channel construction within ABQ property and Pecan Hollow, please
provide the following information.
Written confirmation from Pecan Hollow that the excavation
for widening the channel and constructing a 4:1 sideslope as
described in Alternative No. 1 above will be performed by
the developer in conjunction with filling for lot pads in
Lots 1-10, Block C of Pecan Hollow.
Construction plans for proposed channel improvements signed
by a registered professional engineer in the State of Texas.
These plans should define proposed construction for
Alternative No. 1, excluding permissible filling that can
be performed by the homeowner, and should include:
ae
Proposed grades in the channel including transitions to
the existing channel. Location of drawn cross sections
should also be indicated.
Location, type, and size of headwalls.
Location of requested easement areas.
Channel cross sections.
Doyle Cameron
may 21, 1990
Page 3
Upon receipt of the two items listed above and acceptance by ABQ
and our engineer, ABQ agrees to grant the requested easements
subject to:
Agreement by Pecan Hollow and ABQ on the easement
language.
o
Any prior agreements that affect the easement areas.
As we have verbally advised you previously, ABQ and
Univest have entered into a Mutual Drainage Easement
which affects the requested easement areas.
Execution of an agreement between pecan Hollow and ABQ
addressing verification of grading, liabilities, time
frames for construction, insurance requirements, etc.,
as recommended by our attorney.
Confirmation by our attorney that covenants in the
Pecan Hollow Deed Restrictions or Homeowners
Association Agreement prevent further encroachments and
construction of fences in the channel area.
If you have any questions, please call either myself or Mary
Hicks at ABQ or Jerry Parche'.
Sincerely, /
stan Strickman
Vice President
cc:
Jerry Parche', P.E./Jerry Parche' Consulting Engineers
Bill Anderson, P.E./Dan Dowdey & Associates
Gary Sieb/City of Coppell
Alan Ratliff/City of Coppell
Wayne Ginn, P.E./Ginn, Inc.
Jim Schell,Esquire/ Law, Snakard & Gambill