range averaging a little more than 9 feet. The maximum tide of record 

 at Boston was about 5 feet above mean high water. Tides of 3 feet or 

 more above mean high water occur about once a year. The study area is 

 characterized by rocky headlands and headlands of unconsolidated glacial 

 material. Wave-built bars or spits have been formed. The headlands 

 formerly supplied material to the intervening beaches, but are now 

 generally eroded to bedrock or so protected that they have ceased to 

 be a significant source of supply of material. With their reduction 

 in supply, the beaches have slowly deteriorated. However, groins have 

 been found to be capable of causing accretion south of Manomet Point 

 where there is an appreciable supoly of material from erdding- bluffs. 

 Elsewhere the natural supply of material is insufficient for the forma- 

 tion of adequate protective beaches by groins alone. The construction 

 and maintenance of adequate beaches may be accomplished by artificial 

 placement of sand. The rate of loss of fill can be reduced by groins, 

 except where movement of material is principally to the offshore 

 bottom. 



The Division Engineer and the Beach Erosion Board developed plans 

 for protecting and improving the shores at Crescent Beach, The Glades, 

 North Scituate Beach, Brant Rock and Plymouth Town Beach, and made 

 economic analyses of these plans. They found that projects for 

 protecting and improving Scituate Beach, Brant Rock and Plymouth Town 

 Beach are justified by prospective benefits and that public interest 

 involved warrants Federal aid in construction under established policy. 

 The Division Engineer and the Beach Erosion Board recommended that 

 projects be adopted by the United States authorizing Federal partici- 

 pation by the contribution of Federal funds in amount of one-third of 

 the first costs of measures for the protection of those shores, 

 substantially in accordance with the following plans, with some 

 minor modifications as may be considered advisable by the Chief of 

 Engineers: 



a. North Scituate Beach, Scituate . Widening about 2,500 

 feet of beach to 125-foot width by direct placement of suitable sand 

 fill; 



b. Brant Rock, Marshfield . Widening approximately 2,700 

 feet of beach to a 125-foot width by direct placement of suitable 

 sand fill and raising the inshore end of the existing jetty to Brant 

 Rockj 



c. Town Beach, Plymouth . Widening approximately 1,300 feet 

 of beach to a 125-foot width by direct placement of suitable sand fill, 

 construction of two groins, each about 300 feet long, and construction 

 of a concrete seawall approximately 165 feet long. 



The Beach Erosion Board also recommended authorization of Federal aid 

 to periodic nourishment of the project for North Scituate Beach for a 



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