ST8505-CS 860401GINN, INC.
April 1, 1986
CONSULTING ENGINEERS
Honorable Lou Duggan & City Council
Post Office Box 478
Coppell, Texas 75019
Re: Street Assessment Program
Gentlemen:
The following is a preliminary summary of the financial
impact an assessment program will have on the City of
Coppell's proposed construction program for Belt Line Road
and Denton Tap'Road. This assessment program would be used
throughout Coppell for all other thoroughfares also. It
would maximize the contribution by Dallas County from the
recent County Bond Program.
The following assumptions are used in the calculation:
The $4+ million Dallas County Bond Program funds would be
used uniformly on Belt Line Road (East) and Denton Tap
Road (North). The total distance is 31,100~ feet
(5.9 miles). The allocation of bond funds would be
approximately $135.00 per foot of street.
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The City of Coppell would fund the difference in
construction cost for any roadway segment.
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The City of Coppell would recover the maximum amount of
funds allowed by state law through the assessment program.
The formula for assessment would be:
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Total construction cost minus County participation
equals gross cost to City.
90% of gross cost (to be recovered) divided by length
of project equals the cost per foot to be recovered.
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50% of cost per foot to be recovered is to be applied
to adjacent properties. (Excluding intersection
rights-of-way, railroad right-of-way, parks, etc.)
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The City would pay for street lights, signals, and
landscaping.
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The assessments would be paid back throughout the
time frame specified in the ordinance. Assessments
could be volunteered and paid in advance.
The following evaluations are based on cost estimates for
6-lane divided thoroughfares:
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STREET ~EGMENT EVALUATION
SEGMENT NO. 1:
Denton Tap Road (Sandy Lake Road north to the Denton
County Line): Project length is 6,480 feet. The total
assessable front footage is 9,702 feet (74.8% of total).
Construction Cost
County Participation
$4,600,000.00 *
875,000.00
Gross Cost to City of Coppell
$3,725,000.00
Assessments @ 90% ($3,352,500.00)
Recoverable assessments (74.8%)
Net Cost to City
2,508,000.00
$1,217,000.00
Assessment Project Cost/ft.
Assessment Cost/Front foot
$ 517.00
$ 258.00
Includes:
1. Replacement of bridge over Denton Creek to clear 100-
year flood w.s.
2. Widening of existing Cottonwood Branch bridge.
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SEGMENT. NO.
Denton Tap Road (Belt Line Road north to Sandy Lake):
Project length is 7,522 feet. The total assessable front
footage is 14,437 feet (95.9% of total).
Construction Cost
County Participation
$3,700,000.00 *
1,000,000.00
Gross Cost to City
$2,700,000.00
Assessment @ 90% ($2,430,000.00)
Recoverable Assessments (95.9%)
Net Cost to City
2,330,000.00
$ 370,000.00
Assessment Project Cost/ft.
Assessment Cost/Front foot
$ 323.00
$ 161.00
Includes:
1. Grapevine Creek bridge replacement to raise above 100-
year flood w.s.
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SEGMENT NO.. 3~
Belt Line Road (Denton Tap Road east to Moore Road):
Project length is 6,003 feet. The total assessable front
footage is 2,195 feet (18.3% of total).
Construction Cost $2,045,000.00
County Participation 810,000.00
Gross Cost to City $1,235,000.00
Assessment @ 90% ($1,111,000.00)
Recoverable Assessments (18.3%)
Net Cost to City
203,000.00
$1,032,000.00
Assessment Project Cost/ft.
Assessment Cost/Front foot
$ 185.00
$ 93.00
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SEGMENT NO. 4~
Belt Line Road (Moore Road east to the East City Limit --
Existing Alignment): Project length is 10,990 feet. The
total assessable front footage is 9,022 feet (41.05% of
total).
Construction Cost
County Participation
$5,931,000.00
1,483,000,00
Gross Cost to City
$4,448,000.00
Assessment @ 90% ($4,003,000.00)
Recoverable Assessments (41.0%)
Net Cost to City
1,641,000.00
$2,807,000.00
Assessment Project Cost/ft.
Assessment Cost/Front foot
$ 364.00
$ 182.00
* If properties north of railroad volunteer an assessment of
$182.00/front foot ($782,600.00) then the recoverable
assessment would be approximately $2,423,600.00, and thus the
net cost to the City would be reduced to $2,024,400.00.
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SEGMENT NO. 5~
Belt Line Road (Moore Road to the East City Limit --
Alternate Alignment No. 1): Project length is 11,090
feet. The total assessable front footage 19,040 feet
(85.8% of total).
Construction Cost
County Participation
$4,225,000.00
1,497,000.00
Gross Cost to City
$2,728,000.00
Assessment @ 90% ($2,455,000.00)
Recoverable Assessments (85.8%)
Net Cost to City
2,106,000.00
$ 622,000.00
Assessment Project Cost/ft.
Assessment Cost/Front foot
$ 221.00
$ 110.50
Street lighting costs are based on an estimated cost of
$100,000 per mile. Landscaping costs are also estimated at
$100,000 per mile. Traffic signal installation costs are
estimated to be $75,000 per intersection.
The cost of sidewalks has not been included in the construc-
tion cost estimates for the above due to the undeveloped
condition of most of the frontages. If construction of
sidewalks were to be include as a part of any of the roadway
segments considered above, it would add approximately $10.00
of assessable cost per front foot to the project.
SEGMENT ITEM D~CRIPTION COST
Denton Ta~ Road -
Sandy Lake Rd. to
Denton County Line
Landscape
Lighting
Signals
Subtotal
$122,727.00
122,727.00
75,000.00
$320,454.00
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Denton Tap Road -
Belt Line Rd. to
Sandy Lake Rd.
Landscape
Lighting
Signals
Subtotal
$142,462.00
142,462.00
150,000.00
$434,924.00
t
Belt Line Road -
Denton Tap Rd. to
Moore Road
Landscape
Lighting
Signals
Subtotal
$113,693.00
113,693.00
25,000,00
$252,386.00
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Belt Line Road -
Existing Moore Rd. to
East City Limits
Landscape
Lighting
Signals
Subtotal
$208,144.00
2o8,144.00
150,000.00
$566,288.00
Be
Belt Line Road -
Alternate Alignment
No. 1 - Moore Rd. to
East City Limits
Landscape
Lighting
Signals
Subtotal
$210,038.00
210,038.00
150,000.00
$570,076.00
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The following summary table lists the project segments in
ascending order based on net cost to the City of Coppell:
SUMMARY TABLE
SEGMENT NET GROSS
NO. COST CO~T
2 $ 370,000 $ 2,700,000
5 622,000 2,728,000
3 1,032,000 1,235,000
1 1,217,000 3,725,000
4 2,807,000 4,448,000
($2,024,400)*
LIGHTING, LANDSCAPE,
TRAFFIC SIGNALS
$ 435,000
570,000
252,000
320,000
566,000
* Net Cost to City with voluntary assessments from properties
north of railroad tracks.
If the City elects to construct any or all of the thorough-
fare segments, the City must have the gross cost to the City
available prior to awarding any construction contracts.
The overall benefit of this type of assessment program would
be to allow the construction of approximately $15 million of
street improvements with the funding being supplied as
follows:
City of Coppell
Dallas County
Adjacent Property Owners
(By assessment)
$3.24 million
4.25 million
7.55 million
22%
28%
50%
It is recommended that the City of Coppell adopt this type of
assessment p{pgram in order to maximize the County's
participation and reduce the City's expenditures and thus
allow the building of the greatest amount of thoroughfares
for the City.
The details of this summary report will be presented in our
final report.
Since~, ~
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