ST8201-CS 890417 GINN, INC.
April 17, 1989
Mr. Russell Doyle, P.E.
City Engineer
City Of Coppell
P.O. Box 478
Coppell, Texas 75019
CONSULTING ENGINEERS
Re:
Denton Tap Rd. Imprv. from Belt Line Rd. to Sandy Lake Rd.
Left Turn Lane Variance Request for Sandy Lake Crossing
Dear Mr. Doyle:
As per your written request of April 13, 1989, copy attached, we
have reviewed the variance request and have the following
comments:
1. As mentioned in previous correspondence, the Coppell
Subdivision Ordinance requires a minimum distance of 420
feet between median openings on major thoroughfares.
The median opening which is the subject of this variance
request is located approximately 242 feet south of the
one currently under construction as a part of the Denton
Tap Road Improvements Project.
2. The sketch submitted with the variance request
represents a left turn lane design which is not in
compliance with the Standard Construction Details of the
City of Coppell.
3. The proposed left turn lane is separated from the
northbound transition to the next standard left turn
lane and median opening by approximately 20 feet of
median curb. This close spacing of two left turn lanes
may lead to traffic accidents resulting from drivers
entering the first left turn lane by mistake and
attempting to immediately correct their mistakes by
jogging back to the right and into northbound traffic
without first signaling their intent and checking for
closely following traffic. We are opposed to allowing
two left turn lanes to be located this close together.
4. We do not recommend that the City of Coppell include the
construction of the proposed left turn lane as a part of
the Denton Tap Road Improvements project if the variance
should be approved by the City Council. We are not
17103 Preqon Road · Suite 100 · [.B 118 · Dallas. Texas 75248 · Phone 214/248-4900
prepared to assume any liability for injuries, deaths,
or damages arising out of accidents attributable to the
inclusion of the proposed left turn lane in the project;
and we do not believe that the City of Coppell is
either. Therefore, we recommend that if the variance is
approved, the developer be responsible for constructing
the left turn lane at his sole expense, as a part of his
development project.
Se
Please refer to the statements attributed to Mr. Ginn
in the CONFERENCE MEMORANDUM attached to the variance
request. These statements are inaccurate. Mr. Ginn's
statements to Mr. Kurtz regarding this issue were that
we could not approve the proposed left turn lane since
it was at variance to the Subdivision Ordinance, but the
developer could request consideration for a variance to
the provisions of the Subdivision Ordinance for this
item.
We will be happy to answer any further questions you have
regarding the above.
S inc e r~e ly,
/,.--
John C. Karlsruher, P.E.
Project Engineer
cc:
H. Wayne Ginn, P.E.
Kevin E. Peiffer, P.E.
Randy Fleming
File J-378/260 (a:badleft)
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