The Mississippi River crossing at Lansing, Wisconsin, consists of the main channel Blackhawk Bridge, and four smaller bridges. This page focuses on the fourth bridge from Iowa, the second on the Wisconsin side of the crossing. Like the other smaller bridges in this crossing, the original 1931 wooden structure was destroyed on March 18, 1945 by heavy ice. The crossing sat idle until it was purchased by the states of Iowa and Wisconsin in 1953, the bridges rebuilt, and opened to the public again in 1957.

The Henderson Slough bridge is about as basic as a bridge can be. It has a dozen or so piles driven into the river, small concrete abutments on each end, a few steel beams, and concrete deck. Even the guard rails are nothing fancy, they are just typical guardrail bolted to the concrete deck. The bright green paint is a very nice touch, giving an otherwise routine bridge a splash of excitement.