These are the details from the NSW Government Website
"Sydney Trains is seeking tenders from suitably qualified companies for the concrete repairs to pier 2 at Hawkesbury River Bridge. The works consist of installation of coffer dam, de-watering site, repairs concrete spalling and reinforcement to Pier 2.
A Site Meeting will be held on 20 May 2014 commencing at 10am. Tenderers to meet Sydney Train Representatives at Hawkesbury River Station."
Pier 2 would be the pier under the second and third spans from the south end.
"Spalling" refers to the surface breaking away leaving a roughened face underneath.
Pier 2 would be the closest pier to the failed pier on the 1889 bridge if I recall correctly.
This may be a coincidence.