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Biological Opinions - Bureau of Reclamation

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Table 11.13. Annual percent <strong>of</strong> project effectiveness <strong>of</strong> California Department <strong>of</strong> Fish and Wildlife’s Fisheries<br />

Restoration Grant Program in Northern California (Collins 2005; CDFG 2006-2012, CDFW 2013).<br />

Year Projects Features with Good Total Project Features Percent <strong>of</strong> total<br />

or Excellent Rating* Evaluated*<br />

2004 19 27 70.4<br />

2005 402 473 85.0<br />

2006 59 87 67.8<br />

2007 20 27 74.1<br />

2008 55 77 65.5<br />

2009 62 106 58.5<br />

2010 38 56 67.9<br />

2011 41 55 74.5<br />

2012 20 27 74.1<br />

Total annual average 70.9<br />

*excludes upslope watershed projects<br />

a. Instream Habitat Improvements<br />

Instream habitat structures and improvement projects will provide cover for juveniles to escape<br />

predators and rest, increase spawning habitat, improve upstream and downstream migration<br />

corridors, improve pool to riffle ratios, and add habitat complexity and diversity. Some<br />

structures will be designed to reduce sedimentation, protect unstable banks, stabilize existing<br />

slides, provide shade, and create scour pools. Stream enhancement techniques aimed at reducing<br />

juvenile displacement downstream during winter floods and at providing deep pools during<br />

summer low flows could substantially increase stream rearing capacity for coho salmon (Narver<br />

1978).<br />

Placement <strong>of</strong> LWD into streams can result in the creation <strong>of</strong> pools that influence the distribution<br />

and abundance <strong>of</strong> juvenile salmonids (Spalding et al. 1995, Beechie and Sibley 1997). LWD<br />

influences the channel form, retention <strong>of</strong> organic matter and biological community composition.<br />

In small (

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