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|Title:||Behavior of beach fill and borrow area at Prospect Beach, West Haven, Connecticut|
|Authors:||United States. Army. Corps of Engineers. New England Division|
United States. Army. Office of the Chief of Engineers
Vesper, William H.
|Keywords:||West Haven, Connecticut|
|Publisher:||United States, Beach Erosion Board|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Technical memorandum (United States. Beach Erosion Board) ; no. 127.|
From the Introduction: Immediately prior to 1957, the beach at Prospect Beach, Connecticut consisted of coarse material, generally shingle, cobbles, and boulders, with ledge rock outcrops in the vicinity of and west of Oyster River. The width of beach above the mean high tide line ranged from 0 to 40 feet in front of walls, revetments, and eroding bluffs. Beach slopes, between high and low waters, varied from 1 on 9 to 1 on 28. A sanitary sewer closely bordered the shore, and due to beach recession it had been necessary to construct seawalls and revet the shore to protect the sewer from wave attack. The town of West Haven had spent about $70,000 over a 10-year period constructing and maintaining those protective structures. In 1951, the U. S. Army Corps of Engineers, in cooperation with the State of Connecticut, completed a cooperative beach erosion study of Connecticut shore from New Haven Harbor to the Housatonic River. The purpose of that study was to determine the most suitable methods of stabilizing and improving the shoreline in this area. Prospect Beach is one segment of this shore. The recommended plan of improvement for Prospect Beach involved widening the beach to a 100-foot width by direct placement of sand, and construction of eight impermeable groins. The plan provided for additional widening of the beach at the southerly end of the fill, as this sector of the beach fill was expected to be eroded at a more rate, and to provide advance nourishement of the widened beach. Groins were included in the plan, as the study showed losses from the proposed beach fill would be excessive without these structures. Behavior of a beach fill placed in 1948 on the adjacent shore north of Bradley Point indicated that the only appreciable loss of fill occured between the high and low water lines. Thus it was believed that groins only about 300 feet in length would be required at Prospect Beach. The short groins would permit the passage of some sand from the south end of the fill area to nourish the beach to the north, and thereby permit more economical maintenance of the entire area by periodically placing sand at the south end. The recommended beach was to have a berm elevation 9.5 feet above mean low water and a minimum width of 100 feet at mean high water (+6.4 feet MLW), with added width of about 50 feet along the more exposed south end of the beach adjacent to Oyster River Point. The estimated quantity of sand required was 380,000 cubic yards for the initial fill, and an average of 8,400 cubic yards annually for nourishment.
|Appears in Collections:||Technical Memorandum|