NEW TERN HARBOR FLOATING BREAKWATER - NORTH WEYMOUTH, MASSACHUSETTS 



Breakwater Type: Log Boom FB 



Operational Life: The breakwater was constructed in 1973. Half of the 

 structure has sunk and the other half is still in operation. 



Contact: Michael Myers 



New Tern Harbor Marina 



275 River Street 



North Weymouth, MA 02191 



Operator: Same as contact 



Site Details 



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



gently sloping bottom composed of silt. Depth at mean low water is 0.9 m 

 (3.0 ft). The tidal range is 3.4 m (11.0 ft). 



Exposure: The site is exposed from the southwest. 



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

 the southwest with speeds in excess of 55 km/hr (30 kn) . Storm waves 

 are 0.9 m (3.0 ft) high or greater. Generally, such storms occur from 

 three to five times per year. 



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

 from the southwest with speeds in excess of 95 km/hr (51 knots) . Seas 

 will be 1.5 m (5.0 ft) high or greater. 



Currents and Ship Waves: The maximum current speed at the site is 11.1 km/hr 

 (6.0 kn) . Waves generated by passing boats represent an occasional and 

 potentially damaging problem to the facility. Such waves are typically 

 from 0.3 m (1.0 ft) to 0.6 m (2.0 ft) in height. 



Ice: Both stationary and flowing ice causes damage to the facility in the 

 winter. 



Breakwater Details 



Purpose: This breakwater protects a marina and boatyard located in North 

 Weymouth, Massachusetts. 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. 



Construction: The present operator inherited the log boom from the previous 

 owner and is unaware of any problems arising during construction. The 

 breakwater was once 121.9 m (400.0 ft) long, though it is now only 51.8 m 



79 



