WA9402-CS 970908 Coppell, Texas 75019
4-462-0022
September 8, 1997
Bob Chapman, Deputy Public Works Director
City of Irving
825 W. Irving Blvd.
Irving, Texas 75060
Re: Irving (Dallas) Water Line / Project WA 94-02
Dear Mr. Chapman:
This letter is written as a follow-up to a conversation several months ago concerning the
estimated construction cost of the future sections of the referenced water line. My concerns
are about the design costs and the future construction costs. The October 6, 1994 contract
between the City's of Irving, Coppell and Lewisville specify in Article 1, paragraph 2 that
the City's of Coppert and Lewisville will pay their pro rata share of the cost of construction,
operation and maintenance, including engineering and right-of-way acquisition costs. The
City of CoppeH's share was 20/91 or 21.98%. In Article 1, Section 5 it states that CoppeH's
share for the maintenance will be $192,307.50. The City of Coppert has not paid that
amount because the water line has not been constructed.
The problem that I am currently having is that I have several accounts of money set aside
or encumbered for this project. I am trying to reduce the amount of encumbrances for
the project or insure that I have adequate funds set aside for the future construction.
Currently, in my line items I have $140,000 set aside for the design of the project and
$1,225,699.47 encumbered for future construction. My records show expenditures to date
of $474,300.53. It is anticipated that the $192,307.50 will be paid out of the encumbered
amount for the construction.
In reviewing past information from your consultant, Shimek, Jacobs and Finklea, the first
estimate I found was a letter dated December 6, 1991 that shows CoppeH's share for
obtaining 20 MGD at $878,000. The next memo concerning costs is dated April 2, 1992.
That memo revises the costs and states that if Coppert takes 10 MGD at Sandy Lake and
10 MGD at Belt Line Road then CoppeH's estimated costs would be $1,198,000. That same
memo states that if Coppert elects to take 10 MGD at Sandy Lake and 10 MGD at
Hackberry, then our estimated costs would be $1,663,000. The f'mal contract between
Irving, Coppert and Lewisville dated October 6, 1994 establishes CoppeH's participation at
20/91 but only for the section from the Elm Fork water treatment plant to the Sandy Lake
Road crossing. The crossing is at our current rate of flow control facility. There is no cost
to Coppell or Lewisville for the construction of the water line from the rate of flow
controller on Sandy Lake to the Hackberry Pump Station. The prior cost estimates from
Shimek, Jacobs and Finklea had assumed that Coppell would be taking at least 10 MGD
at either the intersection of Belt Line and MacArthur or 10 MGD at the Hackberry Pump
Station. However, the contract as f"mally structured allows Coppell to take 20 MGD at the
current Sandy Lake Road rate of flow controller. Therefore, there could be a substantial
cost savings to Coppell in the construction of the line. It appears as though the money set
aside by Coppell initially was to insure the ability to take 10 MGD at Sandy Lake Road and
10 MGD at Hackberry. This is the $1,663,000 referenced in the April 2, 1992 letter.
To better manage my ability to construct projects and/or to insure that I have adequate
funds for currently proposed projects, an updated cost estimate for Coppell's share of the
Irving/Dallas water line W A 94-01 will be greatly appreciated.
If you should need any additional information please feel free to contact this office at your
convenience.
Sincerely,
~
Kenneth M. Griff"m, P.E.
Director of Engineering and Public Works