US 151 Monticello Bridge (Old)
The Gazette: July 10 1929
BH Photo #462596
https://www.newspapers.com/newspage/549367221/ Another picture and I believe the OCR implies the builder is mentioned in text, but the OCR is, in usual Newspapers.com form, a garbled mess.
https://www.newspapers.com/newspage/127732272/ also implies they built the bridge at Anamosa on the same route, but it's garbled there as well.
Thanks again Melissa, as always!