Four Corner - Texas Water Development Board

E. Cost Estimates of Alternative Systems Costs - Construction cost estimates for the
alternative water and sewer systems evaluated in the study were broken down into two
separate components. The first component included the construction costs for water
distribution and wastewater collection systems within the Four Corners planning area. The
configurations ofthese systems were dictated by the physical locations of water supply and
wastewater treatment in addition to regulatory requirements. The second component
involves the construction costs for the water supply plant and the wastewater treatment plant
which are based upon the cost of new facility construction or in the case of existing plant
availability, the capital recovery costs of the facilities already constructed. All construction
cost estimates are based upon current unit costs for projects similar to scope and size of
those evaluated in the study.
The Alternative System Cost Table provides a summary of the construction costs for the
water supply, wastewater treatment, water distribution and wastewater collection systems
alternatives. Detailed cost construction costs estimates for water distribution and wastewater
collection systems evaluated are included in the appendices of this report.
Page 22 of28
Preliminary Engineerng Report