I went to visit this site today and there were the abutments right where I left them about 25 years ago. I'm not sure why this bridge is associated with the Straight Creek Bridge, but they are not in the same location, as you can see by their individual maps. This bridge was never replaced, and the pre-1999 bridge at Straight Creek was a Whipple or similar truss that was there long before the late '60s.
I have attempted to upload some photos of the abutments, but for whatever reason they are not processing.
I deleted the link showing the Straight Creek Bridge as a successor to this one because as Rick's photos show, this bridge was not replaced, and the predecessor to the Straight Creek Bridge was a 1934 steel truss.