The project consists of an earth fill dam with stone slope protection long and high. There are three dikes totaling in length, with a maximum elevation of . Cut in rock, the spillway comprises a concrete weir in length. The weir's crest elevation is lower than the top of the dam. There is no lake at the Barre Falls Dam. The flood storage area for the project, which is normally empty, stores floodwaters and covers about in the towns of Barre, Hubbardston, Rutland, and Oakham. The entire project, including all associated lands, covers . The Barre Falls Dam can store up to of water for flood control purposes. This is equivalent to of water covering its drainage area of .