Alexander Ct-CS071112
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THE.CiTY.OF
COPPELL
November 12, 2007
To Whom It May Concern:
REF:
Apportionment of Municipal Infrastructure Costs per Texas Local
Government Code Section 212.904 in Reference to Sidewalk Construction
Associated with the Development of Alexander Court
A request has been made for the City's determination of the proportionality of the required
sidewalk construction adjacent to Denton Tap Road in relationship to the proposed development
of Alexander Court. My approach to determining the rough proportionality was to review the
portions of sidewalk currently missing along Denton Tap Road and Bethel Road in the general
area and then determine the number of rooftops in the general vicinity of the missing sidewalks.
I then assigned a proportionate cost to each rooftop for the missing sidewalk sections.
There are three subdivisions along the west side of Denton Tap Road within approximately a
quarter mile of the intersection of Denton Tap and Bethel Road that currently do not have
sidewalk access along Bethel or Denton Tap Road. The three subdivisions are Alexander Court,
Summit at the Springs, Phases 1 and 2, and the proposed Chateaus of Coppell. The number of
rooftops associated with each subdivision is: 68 in Summit at the Springs, Phases 1 and 2, a
proposed 29 in Alexander Court and a proposed 56 in Chateaus of Coppell. In total there is
estimated to be approximately 153 rooftops on the west side of Denton Tap Road within roughly
a quarter mile of the intersection of Bethel Road and Denton Tap Road.
The next item was to determine the actual amount of sidewalk currently missing adjacent to
those subdivisions. I reviewed the plats, proposed plats and proposed construction plans for
Bethel Road to determine the amount of sidewalk that should be constructed in the future. Along
Denton Tap adjacent to Alexander Court and Chateaus of Coppell, there is approximately 1,515
feet of sidewalk that needs to be constructed. And along Bethel Road adjacent to Summit of the
Springs, Phase I and 2 and Chateaus of Coppell there is approximately 783 feet of sidewalk that
needs to be constructed.
Even though Alexander Court fronts onto Bethel Road, the preliminary Bethel Road construction
plans show only a sidewalk on the south side that would be adjacent to Chateaus of Coppell.
Alexander Court has not been requested nor required to construct a sidewalk along the north side
of Bethel Road adjacent to their southern property line.
255 PARKWAY * POBOX 9478 * COPPEL_L TX 75019 * TEL 972/462 0022 * FAX 972/304 3673
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In total there is 2,298 feet of sidewalk to be constructed in the future along Denton Tap Road and
Bethel Road. It should also be noted that while Alexander Court has approximately 455 feet
adjacent to Denton Tap Road, there is only 320 feet of sidewalk needed because approximately
135 feet of sidewalk has already been constructed by the City of Coppell in conjunction with the
Denton Tap Road bridge over Grapevine Creek.
Basically, there are approximately 153 rooftops in the general vicinity along the west side of
Denton Tap Road and approximately 2,298 feet of sidewalk to be constructed. Dividing the
amount of sidewalk to be constructed by the number of rooftops yields a number of
approximately 15 feet per rooftop that could be apportioned to the 153 rooftops.
Alexander Court is proposing 29 rooftops; therefore, utilizing this approach, Alexander Court
would be required to construct approximately 435 feet of sidewalk (29 x 15 = 435). Per the
preliminary Bethel Road plans and the proposed Alexander Court construction plans, the city is
only asking that Alexander Court build 320 feet of sidewalk adjacent to Denton Tap Road.
Because the 320 feet proposed to be built by Alexander Court is less than the roughly
proportionate amount of 435 feet based on the methodology above, it is my opinion as the
Director of Engineering for the city of Coppell, that the 320 feet required to be constructed by
Alexander Court is not excessive in regard to proportionality.
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Kenneth M. Griffin, P.E.
Director of Engineering and Public Works
Office: 972/304-3686
Fax: 972/304-7041
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