Organized February 10, 1864, for garrison of forts in Boston Harbor. Left Boston for Fortress Monroe, Va., March 7, 1864. Placed in charge of the pontoon train, Army of the James, and participated in the Campaign of Gen. Butler against Petersburg and Richmond, Va., May, 1864. Built and maintained bridges across the Appomattox, connecting Army of the Potomac and Army of the James, and the bridges acres James River used in the frequent crossings of the Federal armies during the siege of Petersburg. In the Appomattox Campaign built the pontoon bridge a Farmville by which the 2nd and 6th Corps crossed in pursuit of Lee, and built the bridge at Richmond, Va. by which all the Union Armies crossed the James River on their way to Washington after close of the war. Assigned to
3rd Heavy Artillery
as Company "I," but remained detached. Mustered out September 26, 1865.