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referenced survey. The reservoir supplies irrigation water to cultivated lands in southeast <br />Pueblo County, north of the Huerfano River. <br />The reservoir storage basin has accumulated a large quantity of silt with the current level <br />against the upstream face of the dam at gauge height 80. There are two functioning 36 inch <br />diameter outlet slide gates on the face of the outlet works having their inverts approximately <br />eight feet below the existing silt level. A silt catchment fence and depressed rock basin around <br />the outlet structure allows water to flow to the valves with minimal silt flow through the valves. <br />The spillway is a 300-foot long concrete ogee crest with an estimated capaciry of 42,000 cfs <br />with no residual freeboard. The spillway discharge channel is a rock cut rectangular channel <br />which is approximately 100 feet wide with a depth of 19 feet and drops vertically from the <br />canyon rim to floor, approximately 80 feet below. <br />B) PREVIOUS STUDIES COMPLETED <br />URS Corporation completed a feasibility study in 2006. The recommended alternative of this <br />study was to replace the existing dam with a new Roller Compacted Concrete (RCC) Dam <br />downstream of the existing dam. The construction of a saddle dam near the left abutment was <br />also required to maintain the desired reservoir storage level. This remains a long-term goal of <br />HCIC, but the estimated thirty million dollar price tag for a new dam is far beyond their present <br />financial capability. An interim and more affordable alternative is currently sought by HCIC that <br />would avoid a zero reservoir restriction and maintain at least some storage in the reservoir. <br />C) PROJECT LANDS <br />This project would not expand the Company's service area and would not irrigate any <br />new lands. The historic maximum land area irrigated is approximately 6,000 acres with <br />approximately 3,000 acres being irrigated under current practices. The dam and reservoir are <br />located in Sections 25, 26, 35, 36, Township 26 South, Range 65 West: Sections 30 and 31, <br />Township 26 South, Range 64 West: Sections 6 and 7 Township 27 South, Range 64 West; <br />Sections 1, 2, 3, 10,11, 12, 14 and 15, Township 27 South, Range 64 West, 6~ P.M., in northeast <br />Huerfano County. <br />D) WATER DEMANDS <br />The number of irrigated acres under the company distribution system has declined from a high <br />of around 6,000 Acres to a current estimate of 3,000 acres. Both a twenty year old reservoir <br />storage restriction and declining and sporadic basin yield are contributing factors to the <br />reduction in irrigated acres. A minimum of one acre-foot of water is required per irrigated acre <br />to raise even a minimal crop with desired supply of two acre-feet per acre for optimal crop <br />yield. The Company in priority basin yield does not supply enough water on an average annual <br />basis to meet the current irrigation demands creating the need for sufficient reservoir storage <br />to capture excess runoff during wet years to carry over to drier periods. <br />E) WATER RIGHTS, YIELD, HYDROLOGY <br />Lytle Water Solutions used historic flow records and water rights call data to project the <br />potential future yield of Cucharas Reservoir. This estimate provides a basis for evaluating <br />Cucharas Feasibility Study ~ Project Background and Need <br />