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<br /> <br />p..0234t <br /> <br />. <br /> <br />. <br /> <br />6 <br /> <br />The project also offers the opportunity to develop fish-rearing <br />ponds on Sand Creek just upstream of San Luis Lake. Rearing ponds <br />could be constructed near San Luis Lake for cold-water fish species. <br />To faci litate stocking of San Luis and Head Lakes, fingerlings pro- <br />vided from State hatcheries would be .raised and fed in the rearing <br />ponds and protected frb-nipYedation,unti 1 the desi red size is reached. <br />At that time, the water containing the fingerlings would be drained <br />into San Luis and Head Lakes. Thus, the rearing ponds would provide <br />economical means to grow fish for maintenance of quality fishing in <br />San Luis and Head Lakes. The 20-second-foot flow of cold water <br />would be adequate to raise trout. Although waterfowl development <br />would be the primary purpose at Head Lake, about 1,000 man-days of <br />fishing annually could be realized without interference with water- <br />fowl use. This would compensate for the loss of 1,000 man-days of <br />fishing lost on the Rio Grande, <br /> <br />Water requirements for the Head Lake Management Area would be 3,000 <br />acre-feet of diversion annually of which 800 acre-feet would be <br />consumptive use. <br /> <br />Costs associated wi th the Head Lake development would be about <br />$279,000 comprising land valued at $110,000 and cost of development <br />for $169,000. Annual operation, maintenance, and replacement costs <br />would be $4,000 annually. The costs, based upon 1969 prices, are <br />shown in Table 2. <br />