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<br />must include turbine-generator performance charac- <br />teristics, headwater data, tailwater data, low flow <br />release criteria, and the flow range of the turbine. <br /> <br />For those who desire to do as much as possible on their <br />own, the Corps of Engineers' publication entitled <br />"Feasibility Studies for Small Hydropower Additions-A <br />Guide Manual" is highly recommended. It can be <br />ordered from: The Hydrologic Engineering Center, <br />609 2nd Street, Davis, California 95616. A check <br />payable to the Treasurer of the United States in the <br />amount of $14.00 must be included with your order. <br /> <br />Appendix B on page 110 lists over seventy Colorado, <br />national and international engineering and <br />manufacturing firms in small-scale hydro. More <br />detailed information on each firm may be obtained by <br />requesting the "Colorado Manual of Small Scale Hydro <br />Engineering and Manufacturing Firms," from the Colo. <br />Small Scale Hydro Office, Room 823, 1313 Sherman <br />Street, Denver, Colorado 80203, (303) 866-3441. <br /> <br />Turbine-Generator Equipment <br /> <br />Traditionally, consulting engineers have specified <br />hydropower generating units on the basis of an opti- <br />mized solution uniquely applicable to a given site. The <br />performance characteristics of the equipment have <br />been defined within narrow limits and have been <br />realized by custom engineering of the turbine- <br />generator unit(s). The range of suitable equipment <br />types has been generally small, usually a Francis or <br />conventional vertical Kaplan unit, or possibly a Pelton <br />unit if the head is very high. Since the equipment <br />contribution to total project cost has typically <br />amounted to 10 to 20 percent, particularly on larger <br />projects, the additional costs associated with this <br />method have been insignificant compared with its <br />benefits. In any case, the cost of the civil work has <br /> <br />30 <br />