Search Constraints
You searched for:
All Creators
United States. Army. Corps of Engineers. Pittsburgh District.
Remove constraint All Creators: United States. Army. Corps of Engineers. Pittsburgh District.
Subject Topical
Dams--Ohio River--Maps.
Remove constraint Subject Topical: Dams--Ohio River--Maps.
Subject Topical
Locks (Hydraulic engineering)--Pennsylvania--Pittsburgh Region--Pictorial works.
Remove constraint Subject Topical: Locks (Hydraulic engineering)--Pennsylvania--Pittsburgh Region--Pictorial works.
1 entry found