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Sand Island Park

The U.S. Army Corps of Engineers completed two shore protection projects on Sand Island, Oahu. Sand Island is a small island within the city of Honolulu. The two projects completed were the Sand Island Channel Shore Protection Project authorized in 1979 under Section 103a of the River and Harbor Act on 1962, as amended (sponsor: the State Department of Transportation, Harbors Division) and the Sand Island Park Shore Protection Project authorized under the Supplemental Appropriations Act of 1987 (Public Law 100-71) directing the Secretary of the Army undertake this project under Section 103a of the River and Harbor Act on 1962, as amended (sponsor: the State Department of Land and Natural Resources, Parks Division). Both projects are in the operations and maintenance phase.

The Sand Island Channel Shore Protection Project was completed in 1981 at a total cost of $511,456. The project consists of 2,382 feet of revetment with a crest elevation +6 feet to +8 feet and a varying slope of 1:1 to 1:1.5. The armor stone is 400 to 3,000 pounds and is keyed and fitted.

The Sand Island Park Shore Protection Project was completed in 1990 at a total cost of $3,179,504. The project consists of 1,580 feet of revetment and a segmented offshore breakwater. The revetment has a crest elevation of +8 feet and a slope of 1:1.5, and the armor stone is 3,000 to 5,000 pounds and is keyed and fitted. The segmented offshore breakwater is 360 feet long fronting 600 feet of shoreline. The offshore breakwater has a crest elevation of +8 feet and a slope of 1:1.5, and the armor stone is 10,000 to 16,000 pounds and is keyed and fitted. 

Sand Island was used for coastal defense in World War II, with remnants of towers and bunkers still visible today. The park offers recreational activities to the Honolulu Harbor area including walking, camping, surfing and fishing.