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RESULTS IFIM Hydraulic Modeling During 2001, we collected IFIM survey information for five discharges on the Fryingpan River (Table 1) and four on the Roaring Fork River (Table 2). A total of 19 transects were established at the Fryingpan River and Roaring Fork River sites (Table 3); however, the run control transect at FPR-LG upper was removed due to a mid-study change in the channel at that location. Overall, FPR-LG (upper and lower combined for WUA calculations) had the highest WUA values for three (brown trout juvenile, brown trout-adult, and rainbow trout- juvenile) of the four main species/lifestage combinations (Table 4). The FPR-BP site had the highest spawning and rainbow trout adult WUA values. Both spawning and adult lifestage WUA values were low at FPR-HG as compared to FPR-BP and FPR-LG (Table 4). FPR-HG contained less than half of rainbow and brown trout adult habitat that the other two sites had. On a riverwide basis, the Fryingpan River had the potential for more suitable habitat for rainbow trout juveniles and adults as compared to brown trout juveniles and adults. The Roaring Fork River contained similar juvenile and slightly lower adult WUA values compared to FPR-BP and FPR-LG. On both rivers and at all sites, juvenile habitat was low compared to adults, averaging less than 30 percent of adult habitat maximum WUA values. Table 1. IFIM measurements conducted during 2001 on the Fryingpan River. Discharge in ft3/s is in parentheses. Date Discharge m /s Measurement 21-22 June 2001 2.66 (94) Transect placement, Water surface elevations, Habitat mapping 9 July 2001 3.00 (106) Water surface elevations 30-31 July 2001 5.13 (181) Bed profiles, Water surface elevations 30 August 2001 6.77 (239) Water surface elevations 12 September 2001 9.68 342 Water surface elevations Note: Reported discharge is from USGS gaging station 09080400 Draft Final Report, Fryingpan and Roaring Fork Rivers February 12, 2003 Miller Ecological Consultants, Inc. Page 26