Updated 9/22/2018:
For reference purposes, here is my pine paint board.
Regarding the piers (West to East), here are my current thoughts and intentions:
- Western abutment: The prototype actually has an abutment built into the hillside and a short pier in front of it (see photo), but I'm invoking modeler's license and putting them together. I am also using stone (peel-n-stick PITA stuff) on the wall behind the abutment.
- Pocket Pier (OH side): This pier is on land and as such is much dirtier than those in the river. I am planning to paint it with the Desert Bisque textured paint. The top ring will get a concrete color (wash). The rest will receive weathering, rust, and enhancement of the seams between the rings. Final thing will be a shot of Dullcote.
- Mid-stream Pier (OH side): This is the westernmost pier actually in the river. The top ring will get a concrete color wash (#2 on my pine board). The rest of the prototype pier is lighter in color, more of a washed out, bleached concrete color. It will get the light gray (#1 on my pine board) wash. Vertical runs of rust will also be applied with weathering powder. Dullcote will fix everything in place.
- Mid-stream Pier (WV side): This full-sized pier is also in the river. It will receive the same treatment as the other mid-stream pier.
- "Shorty" Pier (WV side): This is the first WV side pier that sits on land. As the photos proved the other day, it is also constructed using poured concrete rings. However, like the Steubenville pocket pier, it is darker in color (dirty). It has been painted with the Desert Bisque textured paint (see photo below). The top ring (currently masked with tape) will get a concrete color (wash). The rest will receive weathering and some rust. Finally, I will hit it with a spray of Dullcote.
- Eastern abutment: This is the stone arch bridge that dates from at least the 2nd bridge on the site (maybe it is part of the 1st, I don't know). The photo below shows the arch on its end being test fitted with a piece of the truss bridge. This was taken prior to putting the stone facing on it.
More when I know it. 
George
