entrainment, fish ladder installation on a diversion), and improved stream flows through 

 water leasing. Restoration occurred throughout the drainage but focused mostly in the 

 lower mile of stream. 



Fish Populations 



Chamberlain Creek is a WSCT dominated stream over its entire length, with low 

 densities of rainbow and brown trout in lower reaches. Chamberlain Creek supports a 

 significant migration of fluvial WSCT fi-om the Blackfoot River. In 2004 and 2005, we 

 continued to monitor fish populafions at mile 0.1 (Figure 20). Recent fish population 

 surveys indicate generally stable WSCT densities in the lower-most portion of 

 Chamberlain Creek. Whirling disease sampling in 2004 recorded the continued 

 escalation of whirling disease in lower Chamberlain Creek. A time-series whirling 

 disease assessment indicates high infections (mean grade range 3.3-4.3) levels during the 

 critical WSCT emergence period. 



Dunham Creek 



Restoration objectives: Eliminate the loss of native fish to irrigation canals; restore 

 habitat conditions and migration corridors; improve recruitment of bull trout and WSCT 

 to the Blackfoot River. ;. 



Project Summary 



Dunham Creek, a spawning stream for fluvial WSCT and bull trout, enters 

 Monture Creeks at mile 1 1.5. Two types of fisheries impairment - entrainment of native 

 fish to the Dunham canal and an altered channel, were identified in Dunham Creek. The 

 Dunham canal entrainment problem was corrected with a fish-screening project in 1996. 

 The channel alteration was identified in the early 1970's when ~ 1.3 miles of the Dunham 

 riparian area was clear-cut and burned and the stream channelized. This channelized 

 reach had since become vertically and laterally unstable, resulting in downcutting, 

 increased bank erosion, as well as a channel braiding in downstream reaches. The 

 reconstruction and renaturalization of this channelized section was completed in 2000. 



The primary objective of the renaturalization project was to stabilize the stream to 

 allow riparian 



vegetation to 



encompass the stream 

 over a 10-15 year 

 period, and thus 

 provide long-term 

 stability. Our review 

 of the project 

 indicates that surface 

 water is now 

 reestablished to the 

 lower portion of the 

 reconstruction project 



where the channel Figure 21. CPUE for WSCT and bull trout in Dunham Creek at mile 2.3, 

 was braided and 2000-2005 



-iiWSCT 

 jllDV 



2000 2001 2002 2003 2004 2005 



32 



