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4.4 Barriers to fish passage <br /> Po <br /> tenti <br /> al Issues <br /> Culverts, berms, or dams can eliminate, impede, or delay salmon's abilit to mi at <br /> habitat. Y gr e or gain access to <br /> Key Question <br /> Question <br /> 1 Will a culvert, bean, dam, or other instream structure be con 1' es/~ o <br /> <br /> 1 Salmon Guidelines Area? structed within the <br /> If you answered `YES', proceed with the Potential Requirements and Solutions table b <br /> answered `NO', move to Section 4.5. elow. If you <br /> Potential Re uirements and Solutions <br /> # Requirement or Solution <br /> 1 Use a structure that meets accepted criteria* to allow free passa e of fish , c s/I~ <br /> and other species) during all life stages, and passage of other aquatic animals an n <br /> stream and bed materials (such as gravel and cobbles). d <br /> * Most culverts can be built to ensure passage for salmon and other aquatic <br /> species. The best culverts allow for the full range of stream function to occur in <br /> them. These "stream simulation culverts" allow the substrate and flow conditio <br /> in the culvert to.mimic the natural stream channel for fish passage flows. ODFW s <br /> has fish passage criteria available at the following web site: <br /> http://www.nwr.noaa.gov/Isalmon/salmesa/4ddocs/orfishaa.htm. You ca <br /> consult the Oregon RoadlStream Crossing Restoration Guide at: n also <br /> http://www.nwr.noaa.gov/Isalmon/salmesa/4ddocs/orfishps.htm. Contact ODFW ' <br /> or NOAA Fisheries for additional information on this topic. <br /> 2 Cross the stream with a bridge (with no approach embankment into the <br /> channel) instead of a structure that blocks passage. main <br /> 3 If there is an existing culvert in the project area that does not allow fis <br /> during all fish life stages, attempt to replace it with a culvert or bridge that allows <br /> fish passage. ~ <br /> i <br /> 4 Use fish passage facilities that meet accepted criteria to prevent fish mortali <br /> stress, or migration delay. tY, <br /> i <br /> 5 Obtain all required permits, such as: Erosion Control Permit, Fill-Re ~ <br /> (Oregon DSL and US Army Corps of En . moval Permit <br /> g and Willamette Greenway Permit. <br /> i. <br /> Guidelines for .Salmon 4-19-04 <br /> Page 14 <br /> i <br /> _ <br /> ~ <br /> <br />