Fish population surveys in lower Nevada Creek in the 1 990s downstream of mile 

 4.0 recorded a community of long nose sucker, large scale suckers, reside shiners and 

 northern pikeminnow along with low numbers of sculpins. Extremely low numbers of 

 trout were identified when in April 1 990 a drift boat electro fishing survey found a single 

 brown trout in the lower 3.8 miles of Nevada Creek (Pierce et al. 1997). 



Following the reconstruction of Nevada Spring Creek, we monitored summer 

 water temperatures up- and downstream of the Nevada Spring Creek confluence during 

 both 2004 and 2005 (Appendix H). To ensure mixing of the Nevada and Nevada Spring 

 Creek waters, we placed the downstream sensor 6300' below of the new Nevada Spring 

 Creek confluence. The upstream sensor recorded peak summer temperatures in Nevada 

 Creek >80 "F but >4 °F lower downstream of the spring creek confluence (Appendix H). 

 The 2005 monitoring found comparable maximum July temperatures but notably lower 

 August temperatures (Figure 35). These temperatures although still elevated are now 

 within the tolerance limits for most trout species. This is a result of two main factors: the 

 cooler water now exiting 

 Nevada Spring Creek and 

 the low stream flows in 

 Nevada Creek. 



Using a drift boat 

 electrofishing unit, in 

 September 2005 we 

 established a new fish 

 population survey section 

 (mile 4.5-5.7) in Nevada 

 Creek immediately 



downstream of the 

 Nevada Spring Creek 

 confluence (Appendix A). 

 Consistent with 



U 



a 

 O 



0.3 



0.25 



0.2 



0.15 



0.1 



0.05 



D Brow n trout ' 

 ■ WSCT 

 I n Bull 

 D Rainbow 



1990 



2005 



Figure 36. 



and 2005 



CPUE for trout in lower Nevada Creek, 1990 



community-shift to salmonids in lower Nevada Spring Creek after restoration, we found 

 four trout species and mountain whitefish present in Nevada Creek downstream of 

 Nevada Spring Creek. Densities are however still very low, but notably higher compared 

 to the 1 990 survey (Figure 36). ,• 



North Fork Blackfoot River "' :H/,. . sH i! 



Restoration objectives: Eliminate the loss of bull trout and WSCT to irrigation canals; 

 manage riparian areas to protect habitat for native fish; improve recruitment of native fish 

 to the Blackfoot River. 



Project Summary 



The North Fork of the Blackfoot is the largest tributary to the Blackfoot River, 

 with headwaters draining the Scapegoat Wilderness. Upon exiting the mountains near 

 mile 12, the North Fork enters Kleinschmidt Flat, a large glacial outwash plain before 

 entering the middle Blackfoot River at river mile 54. Five irrigation canals, located on 

 the Flat between mile 8.8 and 15.3, divert an estimated 40-60 cfs fi"om the North Fork. In 

 addition, this reach of the North Fork naturally loses water to glacial alluvium. The 



