We make one of these benches each year for auction at the local TU benefit. Usually crafted from local and historical reclaimed materials, this years bench was put together from a set of Studebaker Bros. wagon springs (we found the axle cap) and wagon tire iron retrieved from the Big Blackfoot river and 120 year old sunken timbers salvaged from the same location on the Blackfoot's banks in Bonner, MT at the site of the Bonner dam.
The beams in the photos are two 16" x 16" x18' monsters that were ganged together with 5 wrought iron bolts still showing the forge welds on the bolt heads. The beams were in the log pool in the river and were anchor points for dividing logs by species and size before they were fed through the mill. Photos of the beams as they were removed from the river and after the iron was removed, ends removed and they were finally separated after 120 years.