NARRAGANSETT BAY FLOATING BREAKWATER - JAMESTOWN, RHODE ISLAND 



Breakwater Type: Goodyear FTB 



Operational Life: The breakwater was constructed in 1975, sunk, then 

 refloated in 1977, and is still in operation. 



Contact: William Munger 



Conanicut Marina 

 10 Ferry Wharf 

 Jamestown, RI 02835 

 (401) 423-1556 



Builder: Same as contact 



Operator: Same as contact 



Site Details 



Water and Bottom Conditions: The structure is located in saltwater above a 



gently sloping bottom composed of sand. Depth at mean low water is 7.6 m 

 (25.0 ft). The tidal range is 1.2 m (4.0 ft). 



Exposure: The site is exposed from the northeast through the southeast with a 

 fetch of 4.8 km (2.6 nmi) . 



Typical Storm Conditions: During a typical storm, prevailing winds are from 

 the east with speeds around 55 km/hr (30 kn) . Storm waves are 0.9 m 

 (3.0 ft) high. On the average, such storms occur six times per year. 



Worst Storm Conditions: During a worst storm on an average year, winds will be 

 from the east through the southeast with speeds in excess of 95 km/hr 

 (51 kn) . Seas will be 1.5 m (5.0 ft) high. 



Currents and Ship Waves: The maximum current speed at the site is 3.2 km/hr 

 (1.7 kn) . Waves generated by passing ships represent an occasional and 

 potentially damaging problem to the facility. Such waves are typically 

 0.9 m (3.0 ft) high. 



Ice: Flowing ice is present in the winter, though poses no problem to the 

 facility. 



Breakwater Details 



Purpose: This breakwater protects a marina located in Jamestown, Rhode Island. 

 This facility is operated from the spring through the fall. The 

 breakwater is in operation year round and is the singular means of wave 

 protection for the facility. During its first 2 years of operation, 

 this FTB also served as a breakwater for an annual boat show held across 



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