PROJ00259

• Contract/PO #: C153424
• Contractor Name: Colorado River Water Conservation District
• Water District: 0
• Bill Number: XB 99-999
• Loan Projects - Doc Type: Feasibility Study

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6. Quantities and Cost Estimates

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Detailed estimates of the quantities and costs of materials
needed for the major features of each of the six East Divide Creek
dams are presented in Appendix D and summarized below.

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TYPE STORAGE TOTAL COST UNIT STORAGE COST
(ac-ft) ($1,000) ($/ac-ft)
Earth 5,400 10,163 1,890
Earth 10,800 15,757 1,460
Earth 16,200 23,180 1,430
RCC 5,400 11,561 2,150
RCC 10,800 18,800 1,740
RCC 16,200 33,987 2,100

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The earthen embankment dams provide the most inxpensive
storage in all size ranges. The cost of storage appears to level off
for the middle and upper capacity earth dams. In general, storage
cos ts are about average in comparison to the other dam si tes con~
sidered in this study.

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F. Mamm Creek Dam and Reservoir Sites

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1. General History

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No previous work was found which discussed potential dam and
reservoir sites in the Mamm Creek Basin. The previous USBR studies
(Ref. 22 and 42) served the irrigated lands of the Mamm Creek basin
using canals; no local storage was provided.

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The Mamm Creek system consists of three drainages, West Mamm,
Middle Mamm and East Mamm Creeks, which flow together to become Mamm
Creek in the northern part of the basin (See Figures 1-1 and III-2).
These drainages are small in area compared to the West Divide Creek
basin. The confluence of the three sub"basins is below mos t of the
irrigated areas.

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The service area for the Mamm Creek area includes about 1900
acres of presently irrigated land, some of which is served by Highline
Ditch water, and Hunter Mesa, which is not irrigated. Hunter Mesa,
with an area of about 4700 acres, is mostly class 1 land presently
under cultivation, primarily dry-land wheat. This area is the primary

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IV-21

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