As I mentioned in the last Pic of the Week entry for 2020, this year’s series pays tribute to the late James Baughn, who created bridgehunter.com, the largest bridge database in the US, and also won the Bridgehunter Awards for Lifetime Achievement for 2019. Every week, we will showcase his greatest bridge pics, most of whom stem from his website.
Our first bridge pic for 2021 takes us to Butler County and the Hargrove Bridge. This bridge spans Black River near the town of Broseley and features a combination of a swing bridge span, whose towers support two truss spans. These spans are the Miller-Borcherding trusses and as we will discuss this in a separate article, they feature a three panel pony truss, whose center panel has an A-shape frame and the outer panels have a subdivided triangular chord. The bridge was built by the Miller & Borcherding Bridge Builders in St. Louis in 1917, at the time when riveted trusses were considered the standard norm for truss bridge construction. The bridge was damaged by floods in 1992 but was restored to its former glory seven years later and has since been open to traffic, but with an 8-ton weight limit. More on this bridge can be found by clicking here.
This bridge was one of James’ first to appear on his website and one of his most frequented visited structures. It is one of those structures that one should visit when learning about the history of American architecture and infrastructure, especially as many bridge builders tried to fashion truss bridge designs of their own instead of building based on the standards provided by the state beginning in 1910- namely Warren, Pratt, Parker or Pennsylvania with riveted connections in a form of gusset plates. Their argument- less steel meaning less costs for manufacturing and assembling. When visiting the bridge, you will see how much less steel it was needed to create a unique structure.
And with that, we will move on with the next bridge James visited but not before we talk about the Miller-Borcherding truss type. And for that we will move right this way…….. => 🙂