Ord 1987-020 - Laserfiche WebLink

Home Browse Search

IV. COST ALLOCATION The cost was derived for each water transmission line by multiplying the length of line by the unit cost for that line. The unit costs were obtained from similar projects recently bid in the area. Normal excavaton through soil was assumed. The unit costs depend mostly on the diameter of line and depth of placement. The costs for constructing new lift stations was obtained by multiplying the required flow at the lift stations in gpm times $140 per gpm. This number was also obtained from recent projects bid in the area. The cost for constructing upgrades to lift stations was obtained by multiplying the required flow in gpm times $120 per gpm. This number was less than the cost for new construction because utilities, site improvements, etc. would not have to be constructed for the upgrade. The cost for constructing a new V';'WTP was obtained by multiplying the required flow in :\-IGD times $3,000,000 per MGD. This number was also obtained from recent projects bid in the area. The cost for constructing upgrades to an existing WWTP were obtained by multiplying the required flow in MGD times $2,000,000 per MGD. The cost was less than the cost for new construction because utilities, site improvements, etc. would not have to be constructed for the upgrade. The costs to construct the required wastewater collection and treatment facilities were allocated for the three entities (City of San Marcos, Lowman Ranch, and Cottonwood Creek Park) based upon a cost propor- tional to the share of the capacity required by each entity. The projected wastewater flow from each entity through each component was divided by the total flow through that component to arrive at the proportional share for each entity. This cost allocation was determined for the selected wastewater system alternative evaluated for the Cottonwood Creek service area. This was determined to be alternative number 6 with a total construction cost of $ 12,624,329. JONES Ii NEUSE 26