Fish populations and other project monitoring 



Nevada Spring Creek supports brown trout dominated community in upper 

 reaches and non-game species (redside shiners, northern pikeminnow, and largescale 

 sucker) in lower reaches (Pierce et al 2002). WSCT thought to originate in Wasson 

 Creek, also inhabit Nevada Spring Creek in low densities, although according to 

 historical accounts were once abundant (Frank Potts, personal communication). 



In 2002 and 2003, we monitored channel changes (Table 3), water temperature 

 (Figure 29), substrate composition (Figure 30), fish populations, and whirling disease 

 levels in Nevada Spring Creek. 



Degrees F 



Figure 29. Maximum monthly summer water 

 temperatures before (2001) and after (2003) 1 .6 miles of 



rhannel rpr.nn<:tnirtinn 



The habitat survey on 

 Nevada Spring Creek focused 

 on measuring pools, riffles, and 

 substrate composition on the 

 restored sections of the spring 

 creek. The survey began at the 

 spring source (mile 3.2) and 

 proceeded downstream to mile 

 2.0, randomly selecting a pool 

 (1-4) and measuring every 

 fourth pool and preceding 

 downstream riffle. Pool 

 measurements include: total 

 pool length, maximum pool 

 depth, riffle crest depth, and 

 wetted widths at the pools 

 maximum depth and the riffle 

 crest. The difference between 

 maximum pool depth and riffle 

 crest depth was used to calculate 

 residual pool depth. Sinuosity, 

 valley slope and channel slope 

 were measured with GIS using 

 USGS digital orthophotos. Two 

 modified Wolman pebble counts 

 were implemented (miles 3.0 and 

 2.0) to determine substrate 

 composition. Pool parameter 

 data was summarized based on 

 mean dimensions. 



Objective for Nevada 

 Spring Creek habitat survey were 

 to provide an assessment of 

 quality of post-restoration pools and substrate composition, and to provide a baseline for 

 future monitoring efforts. 



Nevada Spring Creelt 



- mile 2.6 

 ■ mile 1 .6 



CODDLi: 



Q.- Qr ^r f^.- <r,. 



Particle size (inches) 



Figure 30. Summary of pebble count surveys at two 

 Inration'; nf Nevada Slnrina Prpei< siirnmpr 9001 



45 



