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The HYDROSS boundaries were limited to a great extent by the <br />decision to use the CRSS natural flow data base, which would have <br />been extremely difficult, time consuming and expensive to <br />duplicate. To overcome the limitations of the CRSS data base, <br />which does not model some of the important tributaries such as the <br />Price and Uncompahgre, the CRSS data base was disaggregated using <br />the best available information. HYDROSS ex ands upon the CRSS <br />network and model s 9 nnrias i n the C1T~R-B. -The no a structure was <br />established by the stream network required by HYDROSS and by <br />anticipating where information would be needed for Section 7 <br />consultations. <br />Development of the HYDROSS network took place over several years <br />and has evolved into its present configuration. The original <br />network was developed for and reviewed by the Colorado River <br />hydrology committee as a part of the Colorado River Coordinating <br />Committee effort The on final h r committee network was <br />subsequently a meeting with the Bureau and the <br />Denver Water Department in September of 1985. Until September <br />1985, the structure of the network was ase upon the ~S.S-=model <br />network and t G downstream gain station numberin tem. <br />Fo owin Ong, the HYDROSS network was <br />modified to connect with CRSS a ~ mou o the Dolnre~. hplow <br />t~ Aspinall Unit, and at a new headwaters node 1 ted~.~~ts <br />Co oraao. Atltlltlonal intorm~o~-~ n on the NYUKU55 motlel for the <br />ppII r Colorado River basin can ge obtained from the FWS, Regional <br />Hydrologist, Region 6, U.S. Fish and Wildlife Service, P.O. Box <br />25486, Denver Federal Center, Denver, CO 80225. <br />oca <br />ero, <br />