further research gives this pdf. it will provide an accurate answer about the piers. some are original, some aren't.

https://static1.squarespace.com/static/5eb5d3a0c609106d0d7ecd08/t/63744468ecb9ed51ca8f6fa5/1668564089703/Mannik_Smith_Parkway_Bridge_Report_2022_August_PT2.pdf

the steel structure was replaced. they had to. couldn't get 2 lanes out of the 1 track bridge. not that the new bridge is that wide. I've been across several times in a wide vehicle rubbing tire sidewalls because an oncoming driver didn't understand you can't be 2 feet away from the curb.