ST9904-AG 891010Ruv. 4-24- 89 ~
AGENDA REQUEST FORM
CITY COUMCIL MEE~II~G ~c:Cob~ 10, 1989
ITEM CAPTION: D~cuSsion, consideration, and acceptance of a consu~an~s report
on the i~erchanges and ramping of the proposed Highway rou~e 121 freeway fac~y
designed by the Texa~ Sta~e Depa~,e~t of Highways and Public TranSposition
(TSHD&PT) and ~horizing. the City Manager to respond by letter for the City
of Copp~l to the TSH&P~
./
Recommendation
Russell R. Doyle,. P.E.
Staff recommend~ acceptance of the recommend~ons and requests autho~zation
for the C~y Manag~ to fo~ard by let~ thee recommendat~o~ as requ~ts
from the City of Copp~ll to the Te~a~ StYe Highway and Public TranSpo~tation
Dep~%tme~.
Back,round
On July 18, 1989, the City Council a~horized the City Ma~ger to e~er
i~o a co~%act for professional servic~ with Kimley-Horn and Assoc~es, Inc.
for the evaluation and report. (See attached Item 15, July 11, 1989 pack~)
The cohabitant, Roy Wi~hire, will present the repo~, recommendatio~
and respond to any quest/onS ~f the ClUny Counc~.
BUDGET AMT.:
COMMZNTS:
AMT. ESTIMATED:
a~T. +/- B~GET:
FINANCTAL REVI~M BY:
LEGAL I~EVIEW BY:
AGENDA ~
0588DS
h~vt~ ~ Of:
IKimley. Horn I
Kimley-Horn and Associates, Inc.
ENGINEERS · PLANNERS * SURVEYORS
2660Coit Road, Suite 200 Dallas, Texas 75251 214 386-7007 Facsimile 214239-3820
I 8 1989
.... ~' September 18, 1989
Mr. Russell Doyle
City of Coppell
255 Parkway Boulevard
Coppell, Texas 75019
Re: SH-121 Freeway Review
Dear Mr. Doyle:
In accordance with our agreement, we have completed our review of the proposed SH-121 freeway
between the general limits of FM-2499 and Denton Creek in the northwestern part of Coppell. The
attached map shows a summary of our recommendations.
In reaching our conclusions, we started with the proposed freeway layout as prepared by the State
Department of Highways and Public Transportation (SDHPT) (dated 6/23/89). That layout showed
four "trumpet" interchanges within the study limits -- at our unnamed CAU street on the west, Sandy
Lake Road, Freeport Parkway, and Parkway Boulevard.
City files on this subject were reviewed from the records of the City Secretary, City Manager's
office, and City Engineer. These files contained reports on the subject prepared by Ginn, Inc.,
DeShazo-Starek & Tang, Inc., Council briefing minutes and notes, correspondence from property
owners, correspondence from and to the SDHPT and others, along with miscellaneous meeting notes.
Various meetings have also been held to gather background information and review alternative
concepts:
Coppell City Manager - Alan Ratliff
Coppell City Staff - Russell Doyle and Shohre Daneshmand
SDHPT - John Blain, Jan Wagner, James Loper
David A. Griffin & Associates - Robert Pope
West Side Property Owners - Peter Staks
City of Grapevine - Jerry Hedge
FACTORS TO CONSIDER
In reviewing the proposed freeway configuration, the following factors were considered to be of
significance in reaching conclusions and formulating recommendations:
This section of SH- 121 has been designated as a future freeway, and capacity improvements
are currently under construction. These construction improvements will provide four freeway
mainlanes and four frontage road lanes within what is considered to be the main freeway
right-of-way. All lanes are being built at approximately the same elevation, with at-grade
cross-overs provided at four locations -- including the current Sandy Lake Road intersection.
Anaheim * Charlotte * Dallas * Fed Lauderdale * For1 Myers · Nashville * Orlando * Phoenix
Raleigh * San Diego * Stuart * Tampa · Veto Beach * Virginia Beach · West Palm Beach
Building client relat4onships since 1967
Mr. Russell Doyle
-2-
September 18, 1989
Future interchanges and ramps to bring the roadway to full freeway standards would be
added in such a way that the current improvements would continue to function as part of the
ultimate freeway.
Previous cooperative efforts by Coppell, Grapevine, Flower Mound, SDHPT, and property
owners produced general consensus on locations for proposed interchanges.
SDHPT had provided adjustments to the plan in response to prior requests from the City of
Coppell, specifically adding frontage road bridges across Denton Creek, and recognizing a
Royal Lane connection at Sandy Lake.
Freeport Parkway represents a north-south major thoroughfare of regional significance,
providing an alternate route to IH-35E for traffic from the north to reach employment
centers in west Coppell and DFW.
Sandy Lake Road is a major east-west thoroughfare across Coppell, serving to connect
residents and businesses to both SH-121 and IH-35E.
Royal Lane is a major thoroughfare in western Coppell serving present and future
employment centers. It is virtually constructed between Sandy Lake Road and LBJ Freeway
(IH-635). To serve the economic development of west Coppell, it must have an effective
connection to SH-121.
8. FM-2499 is scheduled for award of a construction contract in October, 1989.
An overhead electrical transmission line has been recently constructed along Sandy Lake Road
in both Coppell and Grapevine.
RECOMMENDATIONS
The following specific freeway configuration recommendations are made to enhance the ability of
SH-121 as a freeway to serve the needs of the City of Coppell, its residents and the
owners/developers of affected properties. They are shown graphically on the attached map.
Support the planned configuration at Denton Creek which provides continuous frontage roads
and Texas U-turns on each side of Denton Creek.
Support the planned location and trumpet interchange configuration at both Parkway
Boulevard and Freeport Parkway interchanges.
Eliminate the planned interchange at the westerly C4U unnamed location. It is felt that this
requires much right-of-way, interferes with effective ramp placement and property
development, and conflicts with the FM-2499/Anderson Gibson intersection.
Leave the Sandy Lake Road intersection on its current alignment, connection to Anderson
Gibson and crossing SH-121 on a skew. Interchange connectors would be provided by
thoroughfare extensions rather than trumpet loops. This configuration:
Mr. Russell Doyle
-3-
September 18, 1989
dd
Permits early construction of the Sandy Lake bridge in response to anticipated safety
problems due to at-grade crossings. Such construction, however, would not depend
on City construction of thoroughfare on new alignment.
Recognizes the existence of a power transmission line that would be very expensive
to relocate.
Provides a more effective way to provide a Royal Lane connection to SH-114.
Requires much less right-of-way and effectively utilizes available existing right-of-
way along Sandy Lake Road.
Respects property ownership lines.
Is less expensive for the SDHPT to build due to use of thoroughfares for interchange
connectors.
Consider extending the crossover bridges closer to the roadway "touch down" point and
confining approach embankments within retained fills in order to open up visual accessibility
and minimize right-of-way required for crossing thoroughfares.
Reconfigure ramps as shown on attached map, providing an additional southbound entrance
ramp just upstream from FM-2499.
Very truly yours,
KIMLEY-HORN AND ASSOCIATES, INC.
Roy L. Wilshire, P.E.
Senior Vice President
Attachment