constructed in 1926. A 600- by 400-ft basin dredged to -10 ft mllw (outer 

 basin) was authorized in 1935 and dredged in 1936. An inner basin, 550 ft 

 long by 325 ft wide (dredged to -10 ft mllw), a connecting channel, and a 

 320-ft breakwater were authorized in 1945. The basin and connecting channel 

 were dredged during 1956 to 1957; the 320-ft breakwater was deferred. A 

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

 structures is given in Table 20. 



Portland District 



Chetco River, Oregon 



62. The mouth of the Chetco River is located on the southern Oregon 

 coast, about 4 miles north of the Oregon-California border. The Town of 

 Brookings, Oregon, is situated along the mouth of the river. 



63. Authorized in 1945, the original project included an 850-ft north 

 Jetty and a 1,550-ft south Jetty, both completed in 1957; and removal of rock 

 pinnacles and abandoned bridge piers was completed in 1959. In 1962, the 

 outer 440 feet of the south Jetty was repaired and raised. The project was 

 modified in 1965 to include a 450-ft extension to the north Jetty and to raise 

 the rest of the north Jetty to +16 ft mllw (completed in 1968). Construction 

 of a 1,800-ft protective dike to +18 ft mllw was completed in 1970. Exten- 

 sions of both Jetties and deepening of the channel were recommended in 1977 

 (the General Design Memorandum having been initiated in 1982), but funds have 

 not yet been made available. A chronology of events related to the develop- 

 ment and repair of the Jetty structures is given in Table 21. 



Columbia River at 



Mouth, Oregon and Washington 



64. The Columbia River is the largest river on the Pacific coast of 

 the United States, with a length of 1,210 miles and a drainage basin of 

 259,000 sq. miles. Extensive and shifting shoals, known as Clatsop Spit, 

 extended north and west from Point Adams on the south side of the river mouth, 

 making navigation into the river hazardous. On the north side of the mouth is 

 Cape Disappointment, about 6 miles north-northwest from Point Adams. Shoals 

 off the southern end of Cape Disappointment are known as Peacock Spit. The 

 ocean bar connects Peacock Spit and Clatsop Spit. 



65. In 1882, Congress authorized a board of engineers to develop a plan 



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