Warren Creek, a small tributary to the middle Blackfoot River, originates on 

 Ovando Mountain, flows 1 2 miles southwest through knob-and-kettle topography until its 

 junction with the Blackfoot River at rm 50, with a base flow of -3-4 cfs. Warren Creek 

 water is used for irrigated hay production and livestock watering. Irrigation causes the 

 middle section of Warren Creek to dewater, although the lower section gains inflow from 

 springs and maintains perennial base-flows of 3-5 cfs. Some riparian areas in mid-to- 

 lower Warren Creek were cleared, heavily grazed, dredged and straightened in some 

 cases using dynamite (Don McNally, personal communication). These actions all 

 contribute to extensive degradation of salmonid habitat over most of Warren Creek. 



Since 1995, Warren Creek has been the focus of extensive restoration actions. 

 The actions involve removal of several streamside corrals, implementation of grazing 

 plans, shrub plantings, several miles of channel reconstruction, instream flow 

 enhancement near the mouth, wetland restoration and the enrollment of private 

 landowners in conservation easement programs. In 2004-2005, the Blackfoot 

 Cooperators continued to work with private landowners on riparian grazing plans, 

 irrigation diversions and reconstruction of channelized stream. The reconstruction 

 project, between stream mile 5.1 and 6.8, increased stream length 96%, from 4,750' to 

 9,300'. The new channel contains -5,400' of E-type and -3,900' of C-type channel and a 

 combined mean 



frequency 

 pools/ 1000. 



of 17 



Fish Populations 



and 



§ 



other T- 



!£ 



o 



(0 



O 



60 



50 



40 



30 



20 



10 



O T- <M « * Irt 

 000000 

 000000 

 CM CM CM CM CM CM 



O T- CM CJ * 10 

 000000 

 000000 

 CM CM CM CM CM CM 



O T- CM CO ^ in 

 000000 

 000000 

 CM CM (M CM CM CM 



« * 10 in o 10 



000 o> o o 



000 000 



CM CM CM I- CM CM 



monitoring 



In 2004 and 

 2005, FWP 



continued to 



monitor fish 



populations at five 

 locations (miles 1.1, 

 2.1, 3.6, 6.8 and 

 8.2), all in areas of 

 previous restoration 

 actions. Population 

 survey results are 



outlined in Figure 43. The three downstream monitoring sites (mile 1.1, 2.1 and 3.6) are 

 in an area of channel reconstruction and grazing exclosures completed in 2000. 

 Fisheries at these sites have not responded as anticipated, although densities of fish have 



Mile 



1.1 



2.1 



3.6 



6.8 



8.2 



Figure 43. CPUE for trout at five sites in Warren Creek, 2000- 

 2005. 



Channel and 

 habitat type 



r Total 

 Habitat 



Units 



« 



Sampled 



Units 



Bankfull width 



Bankfull Depth 



Wetted Depth 



Residual Pool 

 Depth 



Riffle Crest 

 t)epth 



BNKFL 

 W/D Ratio 



C-type pools 

 C-type riffles 



70 

 70 



24 

 24 



11.1+1.8(8.3-14.4) 

 10.9-f 2.0(6.3-15.2) 



2.6+0.6(1.6-3.9) 

 1.6+0.3(1.0-2.2) 



1.2+0.3(0.5-1.8) 

 0.3+0.1(0.2-0.5) 



1.0+0.3(0.3-1.6) 



0.3± 0.1 (0.2-0.4) 6.8 



E-type pools 

 E-type riffles 



51 

 51 



16 

 16 



9.3+ 0.9(6.7-10.4) 

 9.0+0.7(7.6-10.0) 



ail measurements in feet (tenths) with mean, SD and range 



2.9+0.4(2.2-3.6) 

 2.4+0.3(1.9-2.9) 



1.1+0.3(0.6-1.5) 

 0.4+0.1(0.2-0.5) 



0.8+0.3(0.4-1 .3) 



0.3± 0.1 (0.2-0.4) 3.8 



Table 5. Summary of channel measurements for the Warren Creek channel reconstruction. 



53 



