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STUDY AREA 7he study area has bee~ defi~ed as the City of Montrose, Colorado and its water serv1ce area east of the Uncompahgre River. This area i, confined by Otter Road on the south, approximately Lincoln Road on the north, and extends east to about road 6700. Thisis.]nareaofatlOuttensquaremilesondin. eludes a s~all urbanized area west of the railroad which drains to the Uncom- pahgre River. The lower reach of Cedar Creek north of the water service area, to its confluence with the Uncompahgre River, is also included in the study. Basin Characteristics The City of r~ntrose and its water service area west of the Uncompahgre River lie in the lower portions of the basins of three well defined water courses. These streams are Cedar Creek, HontroseArroyo, and Dry CedarCr eek. Montrose Arroyo flows through the center of Montrose, and is tributary to Cedar Creek. Both Cedar Creek and Dry Cedar Creek are tributary to theUncor.- pahgre River. Cedilr Creek flows through ~nd a long the no,.tnern boundary of the city, while Dry Cedar Creek passes the city near its southern bounduy. The heodw~ters Of Cedar C~ee~ originate in the Cimwarron Ridge area at an elevation of approximately 9,400 feet. The creek flows in a generally westerly direction, through the northeastern portion of the City of Montrose to the UnconlpahgreRiver, ata point approximately three miles northw est of Montrose. The Cedar Creek drainage basin is approximately 56.3 squaremi1e 5, (see Figure 1). The upper reaches of Montrose Arroyo lie approximately seven mi1e s east of Montrose at an elevation of approximately 7,500 feet. The stream flow~ 1 n ~ northwe~terly direction through the City of Montrose to it~ confluence with CedarCreGk,inJ:1l€diatelynorthwe5tOftheCity. ThedrainagearCdtrib:Jt,'ry to Montrose Arroyo i s dppro~irratel y 17.8 square mi les. The ~ontro;e Arroyo drainage basin dho cantdin5 fT){)st of tOle ~rbJniwd Jrca of the city itself. Tni s highly developed are~ is flatter' th~n the ,'est of th~ ba~ in, dnd 1 iI'S Gelow 6,000 feet elevation. .,.