Blackwater Dam is a dam in the town of Webster, Merrimack County, New Hampshire.
The earthen dam was constructed in 1941 by the United States Army Corps of Engineers with a height of and long at its crest.[1] It impounds the Blackwater River for flood control and storm water management as one of five related projects in the Merrimack River basin.[2] The dam is owned and operated by the New England District, North Atlantic Division, Army Corps of Engineers.
The seasonal flood-control reservoir created by the dam has a maximum capacity of 93400acre-ft, but is normally dry, apart from the normal flow of the Blackwater. The site includes 8miles of river popular for canoeing and kayaking, and fishing for brown and rainbow trout.