Case Histories of Corps Breakwater and Jetty Structures. Report 3. North Central Division

Bottin, Jr. Robert R.; Robert, R

doi:10.21236/ada198436

Cited by 11 publications

(8 citation statements)

References 0 publications

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“…Figure 6 shows the dolos section and cap looking south in 2004. More historical details may be found in USAE District, San Francisco (1992), Bottin (1988), Kendall (1988), Kendall andMelby (1989 and, and Markle and Greer (1992). …”

Section: Project Location and Brief Historymentioning

confidence: 99%

Monitoring of Dolos Armor Units at Crescent City, California

Myrick¹,

Melby²

2005

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Crescent City breakwater is located on the California coastline approximately 17 miles south of the Oregon border. In 1974 and again in 1986, dolosse were placed along a section of the breakwater particularly susceptible to damage. Monitoring of above water dolosse moment and breakage has been conducted since 1986. In August of 2004, a detailed monitoring survey was conducted of the dolos section of the Crescent City breakwater. The goal of this monitoring is to understand the long-term structural response of the dolosse. Detailed monitoring included ground surveys, aerial photography, photogrammetric analysis, and a broken armor unit survey. Results showed very little dolos movement has occurred since the end of the initial nesting period in 1988. Furthermore, no additional dolos breakage was observed since 1993. From 1995 to 1999, core samples were obtained from dolosse cast in 1986 and in 1974 in order to determine the in-situ strength of units in both non-loaded (near concrete cap) and highly loaded regions (near still water level) of the structure. The cores were subjected to standard laboratory concrete strength tests. Results indicated that the structural strength has increased considerably since construction for non-loaded units. However, concrete strength for units placed in highly loaded units near the still water level was near constant.

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Section: Project Location and Brief Historymentioning

confidence: 99%

Monitoring of Dolos Armor Units at Crescent City, California

Myrick¹,

Melby²

2005

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“…The south breakwater armor stone, ranging from 4 to 9 tons, is larger than the north breakwater armor stone because this structure is more exposed and includes a curved end that protects both the entrance and north breakwater from storm waves. Total cost of the structure was approximately $6.1 million (Bottin 1988b). The navigation channel has an entrance channel 1,500 ft long and 100 ft wide with a bottom elevation of -5.5 ft lwd.…”

Section: Ementioning

confidence: 99%

Scour Hole Problems Experienced by the Corps of Engineers; Data Presentation and Summary

Lillycrop¹,

Hughes²

1993

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“…In South Africa, only some of the dolosse used in Merrifield's original structure were reinforced with only a single piece of scrap rail inserted in the center of the unit. Outside South Africa, reinforcement of dolosse was first tried at Humboldt Bay, California (Bottin 1988a). Subsequently, as reported by Zwambom, reinforced units were used at Kahului, Hawaii; in Japan; and in Namibia.…”

Section: History Of Dolos Usementioning

confidence: 99%

“…During the period 1965-1978, maintenance on the breakwater involved repairs to about 8,000 lin ft at an expenditure in excess of $8,000,000. More information relative to repairs and the history of the Cleveland Harbor breakwaters may be obtained from Bottin (1988b).…”

mentioning

confidence: 99%