Ground penetrating radar (GPR) and portable seismic property analyzer (PSPA), was used in concrete structures for
monitoring, quantifying, and mapping the deterioration of bridge decks. The Montauk Bridge deck was assessed based on PSPA
and GPR data. Based on the analysis of the PSPA data, it was determined that over 65% of bridge conditions were rated serious
to poor condition with an average compressive strength of less than 2500 psi; less than 35% of bridge deck conditions were rated
fair to good with an average compressive strength over 2500 psi.