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r <br />1 <br />1 <br />u <br />2.0 STUDY AREA <br />2.1 Location <br />The study reach of the Gunnison River includes the entire reach that was designated as "critical <br />habitat" for the endangered fish species. Although portions of the Gunnison watershed are <br />located in other Colorado counties, the entire reach of the Gunnison River study (between Delta <br />and Grand Junction) is divided almost equally between Delta and Mesa Counties in the west - <br />central region of Colorado (see Figure 2). <br />2.2 Study Reach <br />The focus of this study on the Gunnison River is from downstream of Delta (approximately 43 <br />miles upstream of the confluence with the Colorado River at Grand Junction) to the confluence <br />(at Grand Junction). At the upstream limit of the study (Delta) the stream elevation is <br />approximately 4920 feet and at the downstream limit of the study the stream elevation is <br />approximately 4550 feet. The study reach contains two USGS gages. One is located at the <br />upstream limit of the study (at the US Highway 50 bridge in Delta) and one is near the <br />downstream limit of the study at Whitewater, Colorado (at the Highway 141 bridge crossing <br />approximately 9.5 miles upstream of the confluence). Information for those two gage, as well <br />as for one gage on a tributary stream is listed in fable 1. <br />TABLE 1 <br />GAGE DATA <br />2 <br />GUNNISON RIVER {I)Ei. TA TU i GRAND JUNCTION) <br />GAGE 1D <br />GAGE NAME <br />RECORD 1'RS _ <br />DRAINAGEi AREA <br />LATILONG ._ .... <br />(LOCATION <br />09144250 <br />GUNNISON RIVER AT <br />19 <br />5628 <br />384501,1080406 <br />DELTA (U /S HWY 50 <br />BRIDGE) <br />09152500 <br />GUNNISON RIVER 9 <br />79 <br />7928 <br />385900,1082700 <br />MI U/S GRAND <br />JUNCTION AT <br />WHITEWATER <br />09149500 <br />UNCOMPAHGRE <br />57 <br />1115 <br />384431,1080449 <br />RIVER AT DELTA <br />2 <br />