apped in the Lake Aldwell and Lake Mills reservoirs (U.S. Dept. of the Interior, Aug. 1996, n. pag.). Of that total deposition, some 4.8 to 5.6 million cubic yards of fine-grained alluvium (silts and clays less than 0.075 m in diameter) and 1.2 to 2.6 million cubic yards of coarse grained sediments (sands, gravels, and cobbles greater than 0.075 mm in diameter) will be reintroduced into the Elwha River system through the proposed action (U.S. Dept. of the Interior, Apr. 1996, n. pag.; U.S. Dept. of the Interior, Aug. 1996, n. pag.). In comparison, approximately 6.9 million cubic yards of the fine-grained sediments stand to be directly pumped via a pipeline into the Strait of Juan de Fuca if the dredge and Slurry alternative is undertaken (U.S. Dept. of the Interior, Aug. 1996, n. pag.). Incremental removal of the dams will be the primary regulation on the rate of sediment withdrawal and will partially effect the resulting term of biological and physical impacts felt on downstream reaches of the Elwha River (U.S. Dept. of the Interior, Aug. 1996, n. pag.).An increase of alluvium transport will renew the natural sediment distribution and hydrological flow patterns to their pre-dam character while new channels and wetland habitats will be created in the freshly drained areas (Foster Wheeler 17). Aggradation of stream load materials will be most prominent in the low-lying and less circulating shoals, including a revitalization of the Ediz Hook [fig. 1] and estuarine beaches (U.S. Dept. of the Interior, Aug. 1996, n. pag.). In response to these raised river beds, water elevations are expected to rise, thereby threatening the resources that fall within the 100-year floodplain (U.S. Dept. of the Interior, Apr. 1996, n. pag.).Surface water quality is likely to be hampered for two to six years after dam abstraction as turbidity, suspended sediments and dissolved solids flow through the system. Furthermore, water temperatures, dissolved...
