WSP04208

• File Number: 8276.851
• Description: La Verkin Springs Unit - Colorado River Salinity Control Program
• State: UT
• Basin: Colorado Mainstem
• Date: 3/23/1983
• Title: LaVerkin Springs Desalinization Project
• Water Supply Pro - Doc Type: Report/Study

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totally evaporated (See Exhibit 1). The LaVerkin spring water
that is diverted will be replaced back into the Virgin River by

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the purchase of water stored in the Quail Creek Reservoir.

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To evaporate the entire flow of the springs, estimated at

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11. 9 cfs (B, 600 AF per year)\ assuming 5.5 feet of net evapora-

tion per year per acre of surface area, requires over 1,550

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acres of land. Using the USGS topographic maps of the purga-

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tory Flat area, all of the alternatives investigated had less

surface area than required.

There are physical features that

begin to increase the costs considerably as the surface area

increases over 1,000 acres.

The largest surface area identi-

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fied in the investigation had 1,220 acres while the most eco-

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nomical evaporation pond size was approximately 1,025 acres.

Exhibit 1 outlines the facility layout for this alternative.

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Even though it would be physically possible to increase

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the surface area to 1,550 acres, there appears to be a more

attractive, economical approach. All of the ponds investigated

averaged between 30 and 60 feet deep, resulting in a substan-

tial amount of storage capacity.

It would seem logical to

build the most economical size evaporation pond and plan on

providing storage for the remaining flow while investigating

potential future industrial uses of the water.

The evaporation pond alternative selected provides for

approximately 14 years of storage capacity.

If no uses of the

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CREAMER AND NOBLE CfN..CONSULTlNG ENGINEERS