WSP05566

• File Number: 8220.124.A
• Description: Pine River
• State: CO
• Basin: San Juan/Dolores
• Water Division: 7
• Date: 8/1/1958
• Author: USDOI Bureau of Recl
• Title: Pine River Project Extension Colorado and New Mexico: Special Report
• Water Supply Pro - Doc Type: Report/Study

SUBSTANTIATING MATERIALS

Ridge Canal L~teraJ.s

Laterals would extend eastward i'rom turnouts in the Ridge Canal to
lands not served directly by that canal. These laterals would have a
total length of 24.17 miles and would vary in capacity from 10 to 1
second-f'oot. They would consist of' 20.20 lllilesof' U11lib.ed section, 'a.84
llIiles of' earth-lined section, 0.89 1ll11e of concrete chutes, andO.l24 lIliJ.e
of siphons~

Drains

Shallow drains would be constructed in the bottoms ot: draws and
swales contiguous to the irrigable lands to prevent ponding of waste
water and seepage encllloachment on the slopes. It is estimted that
about 40 1ll11es ot: these draine would be required.

Construction Costs

Reconnaissance construction cost estimates of project features
based on January 1958 prices are tabulated on the Form PF-l on the
t:ollowing page", The total construction cost is estimated at $2,280,000.

Operation~ Maintenance, and Replacement Costs

Operation and lIlaint~nce of project works including supervision of
water distribution would be accomplished by a mnager-ditch rider who
would be the onJ.;y full-time ell\Ployee. Special mintenance such as weed
spraying and drain and ditch cleaning would be pert:ormed under contract.
The extensive distribution system required to serve the widely dispersed
projeot lands would be cOlI\Paratively expensive to operate and mlLDtain.
In addition to its own specified operation, maintenance, and replacement
expenses, the Pine River project extension would pay an appropriate part
ot: such expenses pertaining to the King Consolidated Canal and the
Vallecito Reservoir and would also pay part ot: the administration and
general expense of the Pine River Irrigation District or other adminis-
trative agency.

An itelll1zed estimate on the above basis at prices equivalent to the
average prevailing during 1955, 1956, and 1957 developed a total opera-
tion, ma1nt~nce, and replacement cost t:or the project of $9,900 annu-
a.l1y, equivalent to $3.20 per acre t:or 3,100 acres.

Water supply

A month-by-month wter supply study ws IIlade to determine the irri-
gation wter requirements of' the Pine River project extension and the
extent to which these requirements could be supplied from the natural
f'low of Pine River supplemented by releases from the Vallecito Reservoir.

8