The project included rock reinforcement of the two-step breakwater and repair 

 of the existing rubble-mound breakwater. A chronology of events related to the 

 development and repair of the harbor structures is given in Table 35. 

 Edmond's Harbor, Washington 



119- Edmonds is located on the southeastern coast of Puget Sound, about 

 15 miles north of Seattle, Washington. The project includes maintenance of 

 two breakwaters and an entrance channel to the basin. 



120. The harbor was constructed by local interests in 1962, and it 

 includes a mooring basin, a rubble-mound breakwater 1,850 ft long with a crest 

 elevation of +18.5 ft mllw, a rock-reinforced treated pile and plank break- 

 water about 250 ft long, and an entrance channel. The Corps project, adopted 

 in 1965, provides for maintenance of the two breakwaters and the entrance 

 channel. Condition surveys are made annually, but there is no record of 

 maintenance work being done. Local interests extended the basin to the north 

 in 1968 and are responsible for all maintenance on the extended basin. A 

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

 structures is given in Table 36, 



Gray's Harbor, Washington 



121. Gray's Harbor is located on the Pacific coast of Washington, about 

 50 miles north of the Columbia River. The project, adopted in 1896 and modi- 

 fied by 13 subsequent Acts, includes a deep-draft navigation channel about 



30 miles long in the harbor and the Chehalis River. The outer portion of the 

 channel is protected by a 13,734-ft-long south jetty and a 17,200-ft-long 

 north jetty; the inner portions are maintained by dredging. 



122. The south jetty was completed in 1902. The north jetty was fin- 

 ished in 1913, then restored, lengthened, and raised in I916. The jetties 

 were constructed by end-dumping from railroad cars, which failed to provide a 

 well-keyed section. The jetties therefore deteriorated by displacement of 

 individual stones by wave forces. Further deterioration was caused by sub- 

 sidence due to unstable foundation conditions. The south jetty was recon- 

 structed during 1936 to 1939 and the north jetty during 1941 to 1942. Both 

 jetties continued to deteriorate after the reconstruction. Hydraulic model 

 studies were conducted during 1950 to 1952 and I969 to 1971. 



123. After the reconstruction of the north jetty during 1941 to 1942, a 

 natural channel was maintained across the bar, and no further maintenance 

 dredging has been required. Deterioration of the north jetty allowed the 



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