Country Estates-CS 920403 NATHAN D. MAIER
COnSUtTING
April 3, 1992
Mr. Ken (3tiffin, P.E.
City of Coppell
255 Parkway Blvd.
Coppell, TX 75019
Dear Ken,
Thank you for taking the time to meet with Peter Staks and me to try to resolve our differences regarding our
desire to leave Stream "O 2-A' in a natural condition as it crosses a portion of Country Estates. We
appreciate your position that this proposal deserves a thorough analysis. The following is a summary of steps
we have agreed to take to try to gain your support for our proposal
1. We will reshape the channel bottom to flatten it's slope, widen the bottom and assure a side
slope of 4:1 or leas. This will reduce the velocity in the channel to less than 5 feet per second.
2. We propose to sod the channel's sides in any area subjea to the 100-year evem
(approximately 25' in width for the length of the open area) with Rollie St. Augustine ~rass.
It is our belief that the reshaping and grassing of the channel will yield a non-eroMve
condition.
3. In order to provide additional erosion protection at the end of our pipe where the velocity is
greatest, we propose to place grouted millsap stone in the channel
4. At our east property line where the improved channel will transition into the natural
channel, we have agreed to increase the width of the floodway area.
$. In order to assure that the City will have no implied maintenance responsibility relating to
the channel, we have agreed to place a note to that effect on the plat and to file a
restriction that places maintenance responsibility wholly upon the lot owner.
Ken, Counuy Estates will offer some of the most attractive and most e~pensive homes within CoppelL In
order to maximize the aesthetic qualities of this subdivision, we think it is of vital importance to preserve this
natural channel and the trees along it.
We understand your position that replacing the channel and trees with a concrete pipe would address the
drainage issue in a virtually maintenance free manner. If this were a tract home subdivision, we would
probably agree with your approach. However, due to the upscale character we are trying the achieve, we
request the latitude to be able to develop a more creative solution.
Three NorthPark/8800 N. Central Expwy./Suite 300/Dallas, Texas 75231/(214) 739-4741
Mr. Ken Griffin, P.E.
April 3, 1992
Page 2
We know you have given this issue a great deal of your time and attention and we are very appreciative of your
consideration. If there is any other information your need, please let us know.
Sincerely,
NATHAN D. MAIER
CONSULTIN~ ENGINEERS, INC.
Mike Daniel
CMD/dmm