Did you mean the Clarion River bridge near the confluence of Toby Creek and the Clarion River on North 5th Avenue north of Clarion? If so, I believe a photo of that bridge and it's replacement may be on Pinterest, here:
You might have to sign up for Pinterest to see it ...
Bridgehunter's page for the bridge is at:
When I went to Clarion State Teachers College 1960=62 we used to jump off the Toby Bridge into the Clarion River, useually under the influence of Iron City beer. I am writing my memoir about growing up in Clarion County, hometown Shippenville. Do you know of a photo of the old iron bride with the steel grid floor? Thanks, Joe