Statistics for occurrence #1 of “Ohio river” in chapter 14 of Brig.-Gen. Bradley T. Johnson, Confederate Military History, a library of Confederate States Military History: Volume 2.1, Maryland:
... Ridgeway Trimble was born in Culpeper county, Virginia, May 15, 1802.
He was graduated at the national military academy in 1822, and was detailed to survey the military road from Washington to the Ohio river , having won distinction at West Point in engineering.
In 1832 he resigned from the army, and becoming chief engineer of the Baltimore and Susquehanna railroad, completed that line to York, Pa, in 1...
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