Title: Allegheny River, Pa. and N. Y. Letter from the Secretary of War transmitting a partial report from the Chief of Engineers on preliminary examination and survey of the Allegheny River, Pa. and N. Y., with a view to enlarging the present adopted project for the improvement of said river (covering section below Dam No. 4)
Subjects: Topographical surveying
Places: Allegheny River (Pa. and N.Y.)