ST0003-AG030128S~-~e-off
T ~ ~ ° ' T '' ~ a DEPT: Engineering/Public Works
AGENDA REQUEST FORM COPPELL
~ j _ * o * DATE: January 28, 2003
F x ^ ' ' ~ ITEM #: 11
ITEM CAPTION
Consider approval of a Resolution to designate Coppell Road from Sandy Lake Road south to Cooper Lane as a
one way street during construction.
APPROVED BY
CITY COUNCIL
ON ABOVE DATE ,
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GOAL(S): ,~ •'
EXECUTIVE SUMMARY:
otion to Approve
ss. # 2003-0128.2
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Approval of this item will provide for a safer construction area and a reduction in construction costs.
Staff recommends approval of allowing one-way designation on Coppell Road from Sandy Lake Road to Cooper
Lane during construction.
Staff will be available to answer any questions at the Council meeting.
FINANCIAL COMMENTS:
DIR. REVIEW:
Agenda Request Form -Revised 09/02
FIN. REVIEW:
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CM REVIEW: ~~^~»
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Document Name: #coppellyd-IAR
A RESOLUTION OF THE CITY OF COPPELL, TEXAS
RESOLUTION NO. 20o3'D/2p, 2
A RESOLUTION OF THE CITY OF COPPELL, TEXAS,
AUTHORIZING THE CITY ENGINEER, IN CONJUNCTION WITH THE
CONTRACTOR, TO MAKE SOUTH COPPELL ROAD SOUTH OF SANDY
LAKE TO ITS INTERSECTION WITH COOPER LANE, ONE-WAY
TRAFFIC DURING PERIOD OF CONSTRUCTION OF COPPELL ROAD;
AND PROVIDING AN EFFECTIVE DATE.
WHEREAS, Coppell Road must undergo reconstruction in the neaz future; and
WHEREAS, during the period of said reconstruction, traffic will be impaired; and
WHEREAS, staff believes that such reconstruction would be safer and less expensive if
the City Engineer, in conjunction with the Contractor authorized to perform such reconstruction,
is permitted to make South Coppell Road one-way during the period of construction; and
WHEREAS, after consideration the City Council has determined that it would be in the
best interest of the City and its citizens to provide for a safer and less expensive reconstruction
process by permitting South Coppell Road to become one-way during the period of construction;
NOW, THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY
OF COPPELL, TEXAS:
SECTION 1. That the City Engineer, in conjunction with the Contractor for the South
Coppell Road reconstruction, is hereby authorized to undertake the necessary steps to make South
Coppell Road, south of Sandy Lake Road to its intersection with Cooper Lane, aone-way street
during the period of construction.
SECTION 2. That the traffic engineer is authorized and directed to erect signs and official
traffic control devices as is necessary to give notice as provided herein
SECTION 3. That this Resolution shall take effect immediately from and after its passage
as the law and charter in such cases provide.
53435
DULY PASSED by the City Council of the City of Coppell, Texas, this the z$ ~'E'day of
2003.
ATTEST:
LIBBY B C Y SECRETARY
TO
ROBERT E. HAGE~CI1'Y ATTORNEY
(RE 1/21/03)
53435
MEMORANDUM
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FROM THE -~" ~; .~--~ ~~
DEPARTMENT OF ENGINEERING ~ ~` ~ ~,o
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To: Mayor and City Council
From: Kenneth M. Griffm, P.E., Director of Engineering/Public Works
Date: January 28, 2003
RE: Consider approval of a Resolution to designate Coppell Road from Sandy
Lake Road south to Cooper Lane as a one way street during construction.
For several years now the City of Coppell has been discussing with a consultant the design of
Coppell Road from Sandy Lake Road south to Cooper Lane. The voters approved this project in
1999. The work will consist of the replacement of a two-lane asphalt roadway with atwo-lane
minimum 33-foot wide concrete street, improved drainage system, sidewalk on one side and a
portion of the Trail System on the other side.
While it may appear that it has taken a prolonged time to proceed with a design contract, in
actuality we have been moving slowly as we consider options on construction. Before we can
finalize the scope of services with a consulting engineer, we need to have a clear concept on how
the roadway will be constructed. This in turn allows the consulting engineer the information
needed to structure their scope of services and fee.
For this particular project, the item that we have discussed numerous times is the ability to
maintain two-way traffic on Coppell Road during construction. If two-way traffic is maintained,
then on the front-end the consultant needs to design temporary roadways taking into account
existing drainage ditches and existing ground elevations. We initially instructed the consultant to
move ahead with a design that would include all necessary temporary paving and drainage to
accommodate two-way traffic during construction. Even under that scenario, there would still be
limited paving width for two-way traffic. Taking that direction from the City, the consultant
prepared a preliminary cost estimate and requested an opportunity to speak again with the City.
In analyzing the necessary components to maintain two-way traffic, it became obvious that there
was a substantial amount of "throw away" dollars associated with maintaining two-way traffic.
In particulaz, because of the deep borrow ditches on both sides of a narrow roadway, you would
need to install temporary drainage systems in one of the borrow ditches, do the necessary grading
and then provide an asphalt surface for traffic to travel on. Once that was in place, you could
remove a portion of the existing paving, put in permanent drainage and then construct an
adequate width of the new paving to allow for two-way traffic. Traffic would then be transferred
onto the new paving. The temporary paving and temporary drainage components would be
removed and the remainder of the roadway built. With any construction there are some
components associated with temporazy paving, however, they aze typically limited in scope.
"CITY OF COPPELL ENGINEERING -EXCELLENCE BY DESIGN"
On this particular project, given the chazacteristics of the existing nazrow paving and deep
borrow ditches, there is approximately $400,000 associated with temporary components. This is
comprised of temporazy traffic barriers, paving and drainage. There would also be an increase in
design fees.
The financial breakdown of each of those is:
temporary traffic barrier t $20,000;
temporary paving f $110,000;
temporary drainage f $250,000;
additional design fee f $30,000.
For this particulaz project, attempting to maintain two-way traffic increases the construction cost
approximately 25%. There aze drawbacks to having one-way traffic for a long section of
roadway. In this location you have four subdivisions on the west side of the roadway whose only
access is to Coppell Road. On the east side of the roadway you have Wilson Elementary School,
one subdivision and several houses that front onto Coppell Road whose only access is off of
Coppell Road. Going to one-way traffic during construction would create a hardship on not only
the adjacent residence but also citizens that utilize Coppell Road on a daily basis. A particulaz
concern is access to and from the school. A one-way street would require buses and citizens
dropping children off at Wilson Elementary to drive out of their way either dropping off or
picking up the children depending on the direction of the one-way traffic.
While cost savings is a consideration in making this determination, safety is also a concern.
Attempting to maintain two-way traffic would push the temporary paving very close to the limits
of the right-of--way. This in turn would compete for space which is currently being utilized in
some places by children walking to Wilson Elementary from the adjacent subdivisions. Also,
maintaining two-way traffic creates less working area for the construction of the roadway.
In the past we have modified traffic patterns on several roadways during construction. Most
notably, Bethel School was closed during the construction of culverts for Stream G6, north
Coppell Road was designated one-way for a portion of that construction and Ruby Road was
closed. During the construction of north Coppell Road there was some problem with citizens
driving the wrong way on the one-way section. That could also be a problem on this section of
Coppell Road if it is designated one-way during construction. Construction of this project could
take upward of a year and the one-way would be in place for the majority of that construction.
No determination has been made at this time on what would be the optimum direction to be one-
way.
Staff will be available to answer any questions at the Council meeting.
"CITY OF COPPELL ENGINEERING -EXCELLENCE BY DESIGN"
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