The previous bridge, a similar concrete bridge at the same location, had been washed out by a flood the previous year. It was reported to be the only bridge on the Alexandria-Colfax section of US 71 that was retained when the old gravel highway was reconstructed with concrete around 1930.
The 1936 bridge was permanently closed to through traffic in 1967 when work began on the next reconstruction of US 71 through the area. This time the highway was straightened, causing the new bridge to be built roughly 100' to the southwest. The Grant Parish police jury requested that the state highway department transfer control of the old bridge to the parish rather than demolishing it.
Looking at historic aerials, this bridge was still in use in 1955, but by 1971 US 71 had clearly been rerouted and the old alignment abandoned. If the "new" bridge was built in 1969 I think it is safe to assume this bridge was bypassed and closed around this same time. The road bed had already been torn up in the 1971 aerial.
Ah, yes. I think this is the bridge I remember on US 71.
The current bridge was constructed in 1958. Thanks for the info on the old bridge. I have attached a family photo from 1943 featuring the old bridge.