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<br />09/11/92 <br /> <br />09:51 <br />e <br /> <br />URS CONSULTANT DENUER <br />ie <br /> <br />012 <br /> <br />0.01824 <br /> <br />permit the facility to be used for propagation of fish, other tha~ the four endangered fish, <br />should the need arise. The initial production quotas were us~ as a basic criteria for total Z <br />biomass2 and a target for design which can be related t9 maximum, average and <br />minimum water flows and various configurations of rearing sy~tems. The general overall <br />size and generic layout of the facility were designed to m~et these Initial production <br />~~. ' <br />re..couJl../~ <br />A state-of~the-art hatchery facility was developed from the cPnceptual modeling effort, <br />incorporating the latest technologies while considering the sp,cial needs for propagating / <br />rare and endangered species. The design effort included qevelopment o~ a hatchery' <br />simulation model which utilized Input variables such asi water flow rates, water <br />temperature, production goals and site conditions and deterr~ined the required number <br />and type of rearing ponds, tanks, feed rates and the 9,eneral; size of the facility. <br /> <br />To protect broodstock and refugie stocks from potential di~ease outbreaks. the T AC <br />recommended that only one-half of all brood and refugia stopks for the four species be. <br />held at this facility. The remaining half would held at vario~s other state and federal / <br />facilities. Additionally, as established by the TACt rearing mett!lods for each species were <br />to be equally divided between intensive and extensive cUltur~ methods. A layout of the <br />facility configured for a warm well water source and 300,Opo fish production level Is <br />illustrated on Sheet 1. Facility layouts for the other design cqmblnatlons are Included in <br />the Final Report. ' <br /> <br />A nutritional strategy was developed for extensive culture o~ augmentation stocks and <br />refugla which Is designed to stimulate a natural feeding iresponse as a means of j <br />enhancing survival and ultimately genetic diversity. Accommo~atlng this strategy requires <br />natural feed production facilities, which have been incorporat~d in the design. Nutritional <br />requirements for intensive culture of augmentation stocks Wit! be satisfied through a diet <br />of manufactured feed. i <br /> <br />Flow requirements for extensive culture are based on oxyge~ consumption data and an <br />acceptable level of water turnover rate for extensive culture. i Flow requirements for the <br />Intensive culture (using various water types and production scenarios) have been <br />calculated by .computer modeling based on oxygen cons4mption data for Colorado <br />squawfish. Tables 4 and 5 identify the maximum requireme~ts for flow, start tanks and <br />rearing ponds to produce 300,000 fish of each species (1 ~.OOO Intensive culture and <br />150,000 extensive culture) using warm (640F) well water. ! <br /> <br />The objective in the deSign for the brood stock and refugia i ponlon of the facility Is to <br />simulate natural fish habitat in an environment with very low Id,ading density. This Is used <br />BS a means of reducing hatchery-induced strBSS and to hali maintain genetic Integrfly. <br /> <br />2 Defined In OIOalWy. <br /> <br />~~ <br />