UPRR & Pine Street Structures & Approaches – Donaldson, Arkansas. This Arkansas Highways Project consists of 90,000 cubic yards of fill material and a new 800′ bridge. This project has great importance to the timber industry which is a main economic driver in Hot Spring County, Arkansas. The 800′ bridge will span Pine Street &the Union Pacific Railroad allowing motorist to experience old 67 just how they did in 1930.