The old Mississippi River high bridge between Muscatine, Iowa and Rock Island County, Illinois had an interesting past. Originally built in 1891, the bridge twice collapsed during its tenure — once in February of  1899, and again in June of 1956. The bridge was eventually replaced in 1973 by the bridge that currently spans the river there. But the old bridge went out with a bang. The bridge was imploded in sections. Enjoy these historic photos.