1911 and 1970, parapet walls, concrete caps, 20- and 100-ton concrete blocks, 

 concrete monoliths, armor stone, and 12-ton tetrahedrons have been used on 

 both jetties in an effort to stabilize the structures. Table 5 shows details 

 of the construction history. In 1971 and 1972 both jetties were rehabilitated 

 by reconstructing the concrete monoliths, placing 42-ton nominal cage- 

 reinforced concrete dolosse around the seaward quadrant of the heads, and 

 placing similiarly reinforced 43-ton dolosse on the shoreward transition sec- 

 tions of the heads. Spot damage to both jetties was repaired in 1985 using 

 42-ton fiber-reinforced concrete dolosse. 

 Kahului Harbor 



9. Kahului Harbor, Maui, Hawaii, is located about 94 miles southeast of 

 Honolulu, Hawaii, on the north coast of the Island of Maui (Plate 10). Two 

 rubble-mound breakwaters provide protection for the harbor. The 2,766-ft east 

 and 2,315-ft west breakwaters were completed in 1931. The heads of both 

 breakwaters were severely damaged by storm waves in 1947, 1952, and 1954. In 

 1956 the breakwater heads were repaired by casting concrete monoliths on the 

 crowns. The slopes of both heads and 250 ft of the west breakwater trunk (sea 

 side only) were protected with a double layer of 33-ton unreinforced tetra- 

 pods; a total of 400 units was placed. A major storm in 1958 (approximately 

 34-ft breaking waves at breakwater heads) breached the trunk of the east 

 breakwater and caused major damage on both heads. After the 1958 storm, emer- 

 gency repairs were made on the east breakwater trunk using basalt armor stone, 

 and model tests were initiated at the US Army Engineer Waterways Experiment 

 Station (WES) (Jackson 1964) to determine the best methods of stabilizing the 

 breakwaters. In 1966, a partial repair of the breakwaters was completed using 

 35- and 50-ton reinforced tribars. Also during the 1966 repair, a concrete 

 rib cap was added to the crest of the east breakwater trunk. In 1969, 260 

 19-ton reinforced tribars and a concrete rib cap were added to the west break- 

 water trunk. This repair work, shoreward of the 33-ton tetrapod area, pro- 

 vided a partial repair of damages incurred by the structure during the 

 December 1967 storm. In 1973 the sections of the west breakwater trunk were 

 repaired using 19- and 35-ton reinforced tribars. The damaged 33-ton tetrapod 

 areas of the west breakwater were repaired with 20- and 30-ton reinforced 

 dolosse, and the east breakwater was rehabilitated with 6-ton unreinforced and 

 20- and 30-ton reinforced dolosse in 1977. The most recent rehabilitation 

 (1982) used 11- and 25-ton tribars on the sea side, 6.5-ton tribars on the 



