breakwater. The Corp's project added an adjacent 12.5-acre basin, a 1,946-ft 

 rubble-mound breakwater, and a channel through the original breakwater to 

 provide access to the second basin. The Corps is responsible for maintaining 

 the Corps constructed breakwater, the mooring basin, and the entrance channel. 

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

 structures is given in Table M3. 



Quillayute River Boat 

 Basin, Washington 



1,41. 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 river's mouth, crest 



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



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



James Island, crest elevation of +8 ft mllw with a crest width of 6 ft; a 



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 I960. 



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 1978. 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 44. 



Shilshole Bay, Washington 



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

 Washington and at the entrance to the Lake Washington Canal. The project 

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

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



37 



