Columbus Junction Bowstring

Map

Given the short length listed, I'm assuming the bridge was a pony truss.

It could've been across either Short Creek or Monkey Run

Overview: Lost Bowstring pony truss bridge over Unknown Stream on Road
Location: Columbus Junction, Louisa County, Iowa
Status: Replaced by a new bridge
Builder: - Wrought Iron Bridge Co. of Canton, Ohio
Design: Bowstring pony truss
Dimensions: Total length: 90.0 ft.
Approximate latitude, longitude: +41.27869, -91.36010 (decimal degrees)
41°16'43" N, 91°21'36" W (degrees°minutes'seconds")
Approximate UTM coordinates: 15/637337/4570992 (zone/easting/northing)
Inventory number: BH 95335 (Bridgehunter.com ID)