Looks like a Pratt to me. The Pratt design does not require counters on any specific number of panels.
At this time I do not know who made the bridge, I emailed the conservation board again with a thank you and an inquiry about the builder for this bridge and the Gedney Lake bridge.
cool bridge, great stone piers. I would say a Pratt and I could be like 33% wrong or right. Who built it? Muscatine was the first real river town I did as a kid with a houseboat that looked like a trailer. The Mighty Mississippi....
So what type of truss is this?