Table 37 



Gray's Harbor 



Gray's Harbor, Washington 



Date(s) Construction and Rehabilitation History 



1896 The Rivers and Harbor Act authorized construction of a single jetty 



extending 18,000 ft seaward from the southerly peninsula at the mouth 

 of Gray's Harbor. 



1898 Construction of the south jetty commenced. 



1898- Point Chehalis shoreline accreted and moved westerly a maximum of 

 1904 3,000 ft just south of the jetty. 



1902 The south jetty was completed to a height of +8 ft mllw and a total 

 length of 13,734 ft, of which 11,950 ft extended seaward of the high 

 waterline. During construction, the adjacent channel undermined the 

 structure causing material overruns which depleted project funds 

 before the design length of 18,000 ft could be obtained. A groin was 

 constructed 11,952 ft from the high waterline. 



1906 Construction of the north jetty to a height of mean sea level 

 (+5 ft mllw) and a length of 9,000 ft was authorized. 



1907 Construction of the north jetty commenced. 



1910 The north jetty was completed to a length of 10,000 ft. An extension 

 of 7,000 ft was authorized. 



1913 The north jetty was completed to a raidtide elevation of +5 ft mllw 

 with a total length of 16,000 ft. 



1916 The north jetty was restored to +8 ft mllw. 



1933 By 1933, the south jetty had subsided to +6 ft mllw at the shoreward 

 end and -10 ft mllw at the outer end. 



1935 Reconstruction of the north and south jetties was authorized. 



1936- A 12,656-ft section of the south jetty was reconstructed to an 

 1939 elevation of +20 ft. The reconstruction blocked the supply of sand 

 to Point Chehalis, causing serious erosion. A 32-ft section of the 

 jetty was removed to try to restore the supply of sand, but it was 

 quickly blocked by accretion south of the jetty. 



1939- The outer 900 ft of the south jetty was destroyed, and crest rock was 

 1946 displaced over the next 2,656 ft. 



(Continued) 

 150 



