PROJ00159

• Contract/PO #: C153305
• Contractor Name: Dolores Water Conservancy District
• Water District: 0
• County: Dolores
• Bill Number: XB 99-999
• Loan Projects - Doc Type: Feasibility Study

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centralized plant. A 20 MGD plant can be constructed for less than 1/2 the cost,
per million gallons per day capacity, of a 1 MGD plant. As an example, the new
Dove Creek treatment facility with a potential capacity of 1.0 MGD was constructed
for about $700,000 while a larger 20 MGD plant has been estimated to cost about
$300,000 (in 1979 dollars) per million gallons per day of capacity,

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The second major item of consideration is selecting the best location for a large

centralized water treatment plant. Four different alternatives for the primary

and satellite treatment plant locations were explored, and the corresponding trans-

mission lines sized to adequately distribute water throughout each facility's

service area. A cost comparison of the various alternatives is given in Table 5-1,

Alternate #1 would involve serving the total district from a treatment plant

located about 4 1/2 miles above Dolores on the Dolores River. The advantage of this

location is the higher elevation which allows distribution of water with a minimum

of pumping costs. In Alternate #2, the district would be served by a treatment

plant located near the outlet of the proposed new tunnel from McPhee Reservoir.

Pumping would be required to serve Dolores and the higher areas to the north.

A primary treatment facility located at the outlet of the new tunnel is also proposed

for Alternate #3, but flow would be supplemented by a satellite plant located in

the Cahone area. This small plant would serve north to Dove Creek and south to

about Lewis. The present Dove Creek facility would continue to provide treated water

for the Dove Creek area. In Alternate #4, a central treatment plant located at the

Rim Site would serve the southern portion of the district with the present Dove Creek

plant expanded to serve the northern area from Dove Creek to Lewis.

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Based on cost effectiveness and the other considerations outlined in Chapter 5,

Alternate #4 is the preferred Alternate recommended for implementation (Figure

2-1). Phased construction of the facilities is proposed, with staging periods

based on the population forecasts in this report.

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Potable water supply from the two treatment plant locations would be conveyed in

three major pipelines: 1) the Northern line between Dove Creek and Yellow Jacket;

2) the Arriola line to Lebanon and Arriola; and 3) the Cortez - Towaoc pipeline

extending south from the "Rim Site" plant. Delivery of municipal and industrial

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