28/34
){kind=link}
){kind=link}
){kind=link}
){kind=link}
){kind=link}
Waterway improvement on the Ohio River. Dam 12, Monongahela River, showing method of bonding monoliths. Navigable pass down movable dams, Ohio and Allegheny Rivers. Bear Trap Dam. Transportation and haulage.
Source: Steve Kirch, collector, and creator of a great website about SCIENTIFIC AMERICAN in the past
Restoration by: magscanner
- Created on
- Thursday 17 June 2010
- Posted on
- Thursday 17 June 2010
- Visits
- 1253