R.H.H. Blackwell Co.

of Kingsport, Tennessee
Hillman Bridge (Madison County, Florida)
Built 1927
Abandoned truss bridge over Suwannee River on Old US-90 (Abandoned Alignment)
Abandoned ca. 1986

US29 Broad River Bridge (Cherokee County, South Carolina)
Concrete superstructure & substructure contractor, 1932
Lost four span Pratt through truss bridge over Broad River on US 29
No longer exists