C153607L Feasibility Study

• Contract/PO #: C153607L
• Contractor Name: Trinchera Irrigation Company
• Contract Type: Loan
• Water District: 35
• County: Costilla
• Bill Number: SB 92-87
• Loan Projects - Doc Type: Feasibility Study

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CHAPTER I: GENERAL INFORMATION

A. Location. The project is located in Section 36 Township 30 South, Range 72
West; Section I, Township 31 South, Range 72 West; Section 31 Township 30
South, Range 71 West; and Section 6 Township 31 South, Range 71 West of the
6th P.M., In Costllla County, Colorado. Access to the project site Is via Ice
House Road off of Colorado State Highways 159 and 160. Figure 1-1 shows the
project location and access.

The nearest town Is Fort Garland located approximately 2.0 mlles west and 2.5
mlles north of the reservoir dam. The nearest city Is Alamosa located approxi-
mately 27 mlles west of the site.

The elevation of the site Is approximately 8200 feet (USGS) as shown on Figure
1-2.

B. Project Map. Figure 1-3 shows the Trlncherra Irrigation Company system
Including the proposed project, nearby towns, and the general land area served
by the company. The area served from the reservoir Is shown In blue and lles
between Mountain Home Reservoir and Smith Reservoir and Includes approximately
11,800 acres of Irrigated farm land. The total Irrigated farm land served by the
Trinchera Irrigation Company Is approximately 14,100 acres.

C. Cllmate. The following tables 1-1 through 1-4 show the average monthly
temperatures, maximum and minimum temperatures of record, average monthly
precipitation, snowfall, Information on hall, and various other statistics concern-
ing the weather near the project site. The tables were supplled by the National
Oceanic And Atmospheric Administration office located In Alamosa, Colorado.
The information provided Is from their weather substations located near Alamosa
and from cooperative stations in Alamosa. Table 1-4 shows the location of the
weather stations utlllzed.

Table 1-1 provides the monthly Information for 1990, Table 1-2 gives the
averages for the years 1961 through 1990, and Table 1-3 gives a summary of
average data for the years 1948 through 1990 .

Over 75 percent of the average annual 7 inches of precipitation occurs between
April and November. Representative seasonal average temperatures for the area
are: 1) January - 160; 2) Karch - 320; 3) Kay - 500; 4) July - 650; 5) Septe-
mber - 550; 6) November - 300. There is an average of 95 frost free-days
according to the NOAA records. Wind velocities are high during the spring
months and soil blowing is a serve problem when soil is bare.

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Olapter I - Ibmtain IbDe Reservoir