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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5. Interconnections with other systems will be made as necessary. Our

analysis includes construction of a pump station and transmission line

from Monument Creek Reservoir to the existing Dove Creek raw water holding

pond.

6. Treated water storage is provided solely for proper system operation. All

distributing entities are responsible for storage to meet peak day and

fire flow demands.

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Due to the additional length of 42" transmission line required (extending 7 1/2

miles from the "Dolores" treatment plant site to the Cortez-Towaoc pipeline),

this site was considered to be less feasible than other alternatives. Additional

disadvantages of the "Dolores Site" are as follows:

1. During late summer and winter months when low flows are encountered in

the river, it is questionable whether make-up water of sufficient quanti-

ties could be obtained from supplemental sources. A probable solution is

to purchase shares of MVIC water stored in Groundhog Reservoir.

2. During spring runoff, raw water from the Dolores River will have higher

turbidity than water obtained from McPhee Reservoir, thus increasing

treatment plant construction and operation costs. Larger sedimentation

basins would have to be provided at the "Dolores Site" plant than are

proposed at the "Rim Site".

3. Since the greatest water usage occurs in the Cortez area, a more economical

approach is to locate the treatment plant as close as possible to the popu-

lation center and minimize transmission line sizes.

4. McPhee Reservoir will provide long term reservoir storage and sedimentation

capabilities for the project area. The "Dolores Site" plant does not take

advantage of these benefits because it is located approximately 180 feet

above the maximum reservoir water surface elevation.

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Rim Site - Central Treatment Plant (Alternate No.2)

The "Rim Site" is located in the vicinity of the existing plywood plant below the

proposed Dolores Canal and diversion tunnel from McPhee Reservoir. Supplies would

be diverted directly from the canal to the treatment plant. This site has the

advantage of being located closer to the population center where the greatest water

usage occurs, and it is adjacent to the Cortez-Towaoc pipeline to be constructed by

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