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<br />('~1 "?n <br />JU iL~~d <br /> <br />3. Laboratory Analysis <br /> <br />Laboratory analyses of the bedload samples collected at all claim sites in 1995 and the <br />claim sites associated with the USGS gaging stations in 1994 and prior years were conducted by <br />the USGS Cascades Volcano Observatory Laboratory in Vancouver, Washington. At the claim <br />sites associated with the Forest Service gaging stations, laboratory analyses collected prior to <br />water year 1994 were conducted by Nez Perce and Clearwater National Forest personnel. <br />Bedload samples collected at the other fluvial process study sites during water years 1994 and <br />1995 were analyzed by laboratories at Case Western Reserve University, the Helena National <br />Forest laboratory, the Panhandle National Forest laboratory and the Rocky Mountain Research <br />Station Boise laboratory. Bedload samples collected prior to 1994 at other fluvial process study <br />sites were analyzed by personnel of the local Forest. <br /> <br />Bedload samples. composited by traverse, were dried, weighed and sieved. At sites <br />maintained by the USGS and at Forest Service sites in 1995, sieve increments differed by a <br />factor of two (standard phi units) while at sites maintained by the Forest Service, sieve <br />increments for 1993 and earlier data were usually related to standards adopted for fishery <br />resources. For practical purposes, these differences are modest, but led to slight differences <br />among data sets [e.g., the first Forest Service sieve larger than the mesh size of the Helley-Smith <br />bag (0.25 mm) was 0.85 mm while for USGS it was 0.5 mm]. Rouse Numbers, the ratio offall <br />velocity to shear velocity, were used in differentiating suspended sediment sizes from bedload <br />sizes (Bagnold, 1966 as discussed by Sumer et al., 1996; Dietrich, 1982; Vanoni, 1977). This <br />was the fundamental factor in the selection of sieve sizes to designate as bedload at USGS sites, <br />sediment larger than 0.50 mm and, at Forest Service sites, sediment larger than 0.85 mm. <br /> <br />For a 3-inch Helley Smith bedload sampler, the bedload-transpon rates Gb, in tons per <br />day, is computed as: <br /> <br />Gb = (0.38095238)(W)(M)rr <br /> <br />(I) <br /> <br />where W is stream width in feet, M is sample mass in grams, and T is total time in seconds that <br />the sampler is on the stream bed [i.e., (number ofvenicals) x (sampling time at each venical)]. <br /> <br />The suspended sediment laboratory analysis was conducted by the USGS Cascades <br />Volcano Observatory Laboratory in Vancouver, Washington for samples collected at the claim <br />sites associated with USGS gages (and Johnson Creek) in water years 1994 and 1995 and at the <br />claim sites associated with Forest Service gages (and Trapper Creek and Johns Creek) in water <br />year 1995. Other samples collected by CWRU personnel (Marsh Creek, Valley Creek, Squaw <br />Creek (USGS), Thompson Creek, Fourth of July Creek, and Herd Creek) and Salmon National <br />Forest personnel were analyzed at the Helena National Forest laboratory. At other National <br />Forest sites -- Idaho Panhandle National Forest (Catspur Creek), and Clearwater National Forest <br />(Fish Creek, Lolo Creek, and Canyon) -- suspended load samples were processed by their <br />respective laboratories. Additional information was also available from the Forest Service <br />Rocky Mountain Research Station (Eggers Creek, Dollar Creek, Blackmare Creek, West Fork <br /> <br />United States' Expert Report Disclosing Methodologies for Quantification of Organic Ad Claims Consolidated Subcase No. 63-25243 <br /> <br />30 <br />