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<br />2. Quality of water must meet basic requirements. <br />a. be in the proper temperature range [20-300C] and <br />growing season [120 days]. <br />b. have at least 7 ppm O2, pH 7-9. <br />,c. be relatively free of contaminents: H2S, Mn, heavy metals, <br />which would be harmful to fish; Silt, sand, fish, and <br />disease organisms. <br /> <br />3. Gravity supply is preferred to pumping. <br /> <br />4. More than a single source of water is preferred, i.e. spring water, <br />well water, etc. <br /> <br />B. Land Needs <br /> <br />1. The site should be in federal or state ownership or be otherwise <br />attainable, and the present use of the land should not conflict <br />with its use for a fish hatchery. <br /> <br />2. At least [50 acres] should be available. <br /> <br />3. Topography should be near level, but with enough elevation for <br />good drainage, so ponds can be drained completely and emptied <br />of fish with relative ease and speed. Raceways would have <br />to have 18 inches of fall between them and enough slope for <br />cleaning. <br /> <br />4. The site must be amenable to construction for pond culture, <br />soil should hold water very well and have a high clay content <br />or clay subsoil. For raceway culture, rocky soil or marsh <br />should be avoided. <br /> <br />C. Location <br /> <br />1. The hatchery site should be located centrally in the Upper <br />Colorado River Basin, within the historical range of the <br />Colorado River endangered fishes, preferably where they still occur. <br /> <br />2. The hatchery site should be accessible throughout the year in <br />all kinds of weather, be within 50 miles of goods and services and <br />have telephone communications available. <br /> <br />3. The local community should have housing available for workers. <br /> <br />D~ Economics <br /> <br />1. Construction, operation, and maintenance costs should be the <br />most economical,' provided fishery management requirements <br />can be met as well. <br />a. Life span of facilities should be considered and future <br />replacement costs calculated. <br />b. Operating and maintenance costs should be determined. <br />