Basin, Washington

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River Boat

Basin, Washington

The Quillayute River project is located on the Washington coast at

the town of La Push. The project includes a small-boat basin with a timber

training wall on one side and timber breakwaters at each end; a 1,400-ft-long

rubble-mound breakwater along the east side of the

mouth, crest

elevation of +15 to +18 ft mllw with a crest width of 1 ft; a 1,050-ft-long

rubble-mound dike along the west side of the river between Quillayute Spit and

ft mllw with a crest width of 6 ft; a

James Island, crest elevation of

navigation channel extending from deep water to the small-boat basin; an

additional channel extending to the mouth of Smith Slough; and maintenance of

Quillayute Spit, a natural spit about 3,400 ft long.

142. The project was authorized in 1930 and constructed in 1931. The

jetty and dike were damaged by winter storms and repaired in 1932, 1941, 1946,

1949, 1953, and 1956. In 1956 the Corps assumed responsibility for repairing

the spit. The boat basin was dredged in 1957. The jetty was raised in 1957

and again in 1960.

143. The dredged material was deposited on the spit. In 1973 the mate-

rial dredged from the river was too fine for replenishing the spit, and seri-

ous erosion problems developed. A rock blanket covering the spit was recom-

mended. The blanket, with a 10-year life expectancy, was installed in 1974

and replaced in 1 7 . The spit was breached in 1979 and 1981.

144. In 1982 major rehabilitation of the project was recommended. A

chronology of events related to the development and repair of the harbor

structures is given in Table

Shilshole Bay, Washington

145. Shilshole Bay is on the eastern shore of Puget Sound at Seattle,

and at the entrance to the Lake Washington

includes a 4,200-ft-long rubble-mound breakwater with a crest height of +20

mllw, a 240-ft-long rubble-mound extension at the north end of the breakwater