John C. Gregg

Barrett Mill Bridge 35-36-11x (Highland County, Ohio)
Built 1866
Lost Long through truss bridge over Rocky Fork
Destroyed by fire

Lynchburg Covered Bridge 35-14-11 / 35-36-06 (Clinton County, Ohio)
Built 1870
Long through truss bridge over East Fork Little Miami River on CR6 in Lynchburg
Open to pedestrians only

Shotts Bridge (Ross County, Ohio)
Built 1867
Lost Long through truss bridge over Paint Creek on Blain Road
Replaced by a new bridge

Silvey's Ford Bridge (Ross County, Ohio)
Engineer, 1870
Lost Howe through truss bridge over Scioto River on East Main Street
Replaced by a new bridge