hinges to meet in the center of the street, and A-frames erected in the roadway provide intermediate support. The leaves are framed with structural steel rolled sections covered with steel plate facing. The gates swing manually toward the city of Providence with the help of "arms" (on the gates themselves) and "feet" (anchored under the road).

The gates at Allens Avenue are 13 feet high and 76 feet wide, but has a clear opening of 67 feet. The top elevation is 25 feet above mean sea level while the sill elevation is 12.25 feet above mean sea level. The abutment wall is recessed such that each gate will swing back, but with one face exposed to the weather. The back face of the abutment walls are battered. Three A-frames support the gates, each made of aluminum alloy and consist of a diagonal compression strut and a vertical tension member, all pin connected.

The South Main Street vehicular gate has a clear opening of 41.5 feet, a tope elevation of 25 feet above mean sea level, and a sill elevation of 14 feet above mean sea level. The structure is similar to the gate at Allens Avenue. The reinforced concrete abutments and sill are supported by bearing piling. The South Main Street steel gate will also be of two leaves, but with a single A-frame support.

An additional steel swing gate provides access between the electric company plants, which are above the dike, and its fuel storage area just below.