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I I I I I I I I I I I I I I I I I I I Site 14: Site 14 was a downstream chute channel located in the Ouray Wildlife Refuge (RM 258.3). This Backwater had an area of 880 m2 with a maximum depth of 5.2 ft. By February 4, average surface ice of 0.6 ft had reduced the area of suitable habitat to 650 m2. On February 25, flow through on section of the habitat had reduced the area of the backwater to 250 m2. Despite substantial changes to this habitat throughout the winter in was still considered suitable habitat. 7.0 SUMMARY The unusually warm temperatures during the winter of 1993-94 created mild winter conditions, with very little ice formation on the Green River. Of the 14 backwaters surveyed during this study, 5 became unsuitable habitat during the winter. Of these five, four were affected by changes in river morphology and/or river flow, one was affected by ice conditions (Table 7). Table 7. Summary of overwinter habitat suitability of 14 backwaters sampled during the Wmter Ice Study, 1993-94. Site # (River Mile) Suitable Habitat Through Winter (Yes/No) Reason Not Suitable Reach 1 # 1 (332.0) #2 (329.7) #3 (327.3) #4 (328.5) Reach 2 No Yes No No Backwater lost due to channel morphology changes Habitat change forming a side channel Backwater lost due to channel morphology changes #5 (314.7) #6 (314.6) #7 (316.2) #8 (298.2) #9 (297.2) #10 (295.5) #11 (292.5) # 12 (293.0) Reach 3 Yes Yes Yes Yes Yes No Yes Yes Habitat change forming a side channel # 13 (255.8) #14 (258.3) No Yes Ice jam caused habitat change fonning a side channel 15