The bridge you're thinking of is https://bridgehunter.com/ia/pottawattamie/bh55079/, complete with a screencap of the article you mention.
The Davenport, Iowa newspaper story in February 1911 shows a photo of this bridge. The story says that the builder was the Gould Construction Company of Davenport.
The bridge you're thinking of is https://bridgehunter.com/ia/pottawattamie/bh55079/, complete with a screencap of the article you mention.