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<br />HYDROLOGY <br /> <br />Contributing drainage area (above Trinidad <br />gaging station) ..........................,....... <br /> <br />Runoff and time of occurrence: <br />Average annual twater years 1925-1957) <br />Maximum annual water year 1942) . ......... <br />Minimum annual water year 1951) . ......... <br /> <br />REMARKS <br /> <br />795 sq.mi. <br /> <br />62,100 ac.-ft. <br />197,300 ac.-ft, <br />16,300 ac.-ft. <br /> <br />In the development of the plans for constructing the Trinidad Project, <br />the activities of the Bureau of Reclamation were confined to investi- <br />gating the irrigation functions which consist of improving the water <br />supply for 11 existing irrigation ditches. The irrigation investi- <br />gations included studies of the irrigation water supply and utilization, <br />classification of the project lands, and economic studies for estimating <br />the payment capacity of the lands and the irrigation benefits. Other <br />studies were confined to a survey of the existing irri@ation facilities <br />which revealed that their general condition is good and that they will <br />be adequate for serving the project lands after minor improvements <br />are made as provided for in the OM&R estimates used in the economic <br />analysis. <br /> <br />In past operations, the irrigation water supplies for the area as <br />a whole have been inadequate and ill-distributed--the average annual <br />quantity amounting to 61.0 percent of the total requirement with <br />late season supplies being consistently unavailable, Construction <br />of the project and restricting deliveries to irrigable lands only <br />will increase the annual average supply to 83.0 percent of the total <br />requirement. <br /> <br />The Purgatoire River Conservancy District bas been organized for <br />the purpose of contracting for repayment and for management of the <br />project water supply. <br /> <br />vi <br /> <br />:::,.. <br /> <br />