Collins, along with a subconsultant, performed bridge load ratings on 67 MassDOT and municipally owned structures to determine their load carrying capacity. The work took place from 2013-2016 over 10 separate assignments.
The general scope of work consisted of the determination of the live load capacity for bridge structures. The work also included the review of existing ratings and making necessary calculations to bring them into compliance with the National Bridge Inspection Standards, 23 CFR part 650 subpart C, section 650.303.
Prior to starting work on each bridge, Collins reviewed the plans, inspection reports, and all other data furnished by MassDOT. Based on this data, Collins created a cost proposal covering all services in connection with the rating of each bridge assigned. Collins verified in the field what was contained on the latest plans, inspection report, and bridge rating report. If Collins found an adverse condition not noted or documented sufficiently on the inspection report, MassDOT’s Bridge Section was notified immediately.
The engineers performing the ratings, field verifications, or check calculations were knowledgeable in bridge design and analysis, AASHTO specifications, and the Massachusetts Highway Department Bridge Design Manual. A Massachusetts P.E. stamped all bridge ratings. Where possible, the ratings were prepared using MassDOT-approved software as outlined in Chapter 7 of the Bridge Manual. Rating reports were prepared and submitted in accordance with the latest instruction outlined in Chapter 7 of the Massachusetts Highway Department’s Bridge Manual.