Massachusetts Bay Transportation Authority (MBTA) has chosen Hardesty & Hanover to carry out the full design of the new bridge and provide services during the construction phase.
The existing bridge, which carries trains, has been in service for over 100 years and its condition is deteriorating, though some repairs have been made.
The new bridge will be about 160m long and will carry two rail tracks over the Saugus River. The opening section will be a rolling lift ‘Scherzer-style’ bascule span. The approach spans will be through-girder spans with reinforced concrete ballasted decks.
The new alignment and profile of the replacement bridge will be off-line from the existing bridge and so there will be only minimal impact to rail services during the construction period.
The aim is to advertise the project for construction towards the end of 2020. Construction is expected to take approximately three years.