This picture is from the Marathon County Historical Society of the Knowlton bridges crossing Lake DuBay at Knowlton, Wisconsin. The single lane car bridge and RR bridge was removed around 1978-80 and I will dig for the actual date.
Cars could cross on State HWy 34 if there were no trains. There were many times in the early morning 5am to 6:00am I was the first to cross after a train had gone through. Many, many times I had to get out of the car and move to the side a pulp stick or more. The Milwaukee Road ran this rail line the Valley Sub. No way did you want to be on the car bridge if a train was crossing. Not only was there a chance of getting spiked by a pulp stick but the shaking of the bridge was very scary. I was young and stupid 1 time, never again.
I had planned on modeling the Valley Sub of the Milwaukee Road in the 70’s and this bridge would have been a key scene of the layout. Instead I went with the Valley Sub of 2005 after the WC was purchased by CN. The current bridge is not attached to the now 2 lane HWY 34.
Tom in Wisconsin
Here is the current version, this photo was pulled from train.org.
Our house from 1980 to 2014 was about 300’ to the southwest of this picture. Or follow the shore line along the left from the bridge.