I question whether the sufficiency and traffic count figures are actually for this bridge...it appears to be basically serving as someone's driveway, as the road ends at a house just past (west of) the bridge. The ADT of 30 seems much higher that what it could realistically be...and, if a bridge like this could score anything above 5, let alone 57, I would be amazed.
Bridge pin should be moved a little north, it is at the end of dead-end Rd. 30 that leads into private property on other dide, just south of Independence Rd. Neat little thing, long curvy on Independence Rd. to get there, pretty desolate.
This bridge has had an extra diagonal with turnbuckle added. This is an interesting little modification.