Tunnel (Lincoln Av.) under RR tracks in Steubenville, Jefferson County, OH. Dean Martin Blvd (OH7) S. 1.6 miles from jct with US22 in Steubenville, W. on Slack St. 0.1 miles, S. (curves W.) on 4th St. (becomes Lincoln Av.) 0.3 miles to the tunnel. (5-7-06, N40 21.10 W80 37.22) Photo by Jack Schmidt.