Our first Mystery Bridge of 2021 and the 148th in the series takes us to Michigan and the Red Arrow Highway Bridge. The bridge is 28 feet long and is located near Benton Heights, spanning Blue Creek. The bridge has been out of use for well over 110 years and is currently privately owned. Yet the bridge has a lot of ornamental features that makes visiting it a must. Satolli Glassmeyer from History in Your Own Backyard produced a film about this phantom bridge, the historic Red Arrow Highway and the history that we know to date. What we don’t know is who built it and who designed the rail piers?