Discover Allegheny River (Pa. and N.Y.)

Bridge across the Allegheny River, McKean County, Pa

Bridge across the Allegheny River at Port Allegany, Pa

Bridge across the Allegheny River at East Brady, Pa

Bridge across Allegheny River in Venango County, PA

Allegheny Delegation

The Ohio and Mississippi navigator of Zadok Cramer

Souvenir of Port Allegany

Bridge across Allegheny River at or near Emlenton, Pa

Bridge across the Allegheny River at Tionesta, Pa

Kinzua Dam, Allegheny River, Pennsylvania and New York

Bridge across the Allegheny River, Armstrong County, Pa

Survey of the Allegheny River. Letter from the Secretary of War, in reference to the survey of the Allegheny River

Designating segments of the Allegheny River in Pennsylvania as a component of the National Wild and Scenic Rivers System

Journal of Samuel Maclay while surveying the west Branch of the Susquehanna, the Sinnemahoning and the Allegheny rivers in 1790

Bridges across the Monongahela, Allegheny, and Youghiogheny Rivers, in the County of Allegheny, Pa

Bridge across the Allegheny River near Parkers Landing, Armstrong County, Pa

Bridge across the Allegheny River

Allegheny River. Letter from the Secretary of War, relative to the improvement of the Allegheny River, Pennsylvania

Bridge across the Allegheny River, near Warren, Pa

Allegheny River, Pennsylvania

Improvement of the Allegheny River. Letter from the Secretary of War, to the Hon. Harry White, House of Representatives, transmitting information in regard to the appropriation for the improvement of the Allegheny River from Pittsburgh to the mouth of French Creek

Bridge across the Allegheny River, etc

Bridge across the Allegheny River, Glade and Kinzua Townships, Warren County, Pa

Report of Flood commission of Pittsburgh, Penna., containing the results of the surveys, investigations and studies made by the commission for the purpose of determining the causes of, damage by and methods of relief from floods in the Allegheny, Monogahela and Ohio rivers at Pittsburgh, Penna., together with the benefits to navigation, sanitation, water supply and water power to be obtained by river regulation