Newburyport/Rockport Line

Draw Number 7 shortly before replacement

Owing to its position along the North Shore coastline, the Newburyport/Rockport Line has a large number of river crossings, including movable bridges over the Saugus River and Danvers River on the mainline as well as Days Creek and the Annisquam River on the Rockport Branch. Draw Number 7 over the Mystic River between Somerville and Everett, built in 1877, was the oldest horizontally folding drawbridge in the country[11] until it was replaced by a fixed high-level concrete span on August 26, 1989. The new $34.2 million bridge, which was completed nine months ahead of schedule, eliminated the 5 miles per hour (8.0 km/h) speed restriction on the old bridge.[12][13]

The Beverly Drawbridge spanning the Danvers River was replaced in 2017. The abutments of the approach spans were repaired, followed by a 21-day service shutdown from July 17 to August 13, 2017, for the complete replacement of the swing bridge section.[14][8] The MBTA Board approved the $16.2 million contract in February 2016; work will last from March 2016 to December 2017.[15] The line was shut down on weekends from July 8 through August 27, 2017, for the installation of Positive Train Control equipment in order to meet a 2020 federal deadline; four of those weekends overlapped with the already planned service curtailments for drawbridge work.[16][8]

The Gloucester Drawbridge over the Annisquam River consists of a steel drawbridge and western approach span with a timber trestle for the eastern approach. It was built in 1911, modified in 1932, and substantially repaired in 1984-85. It will be completely replaced with a modern box beam bridge on steel piles.[17] By February 2016, bidding was planned to begin by June for the four-year, then-$34 million project, though funding had not been allotted.[18] The MBTA Board approved a $56.9 million contract in October 2017; funding is split between federal and state funds. The 44-month project was to require 10 weekend shutdowns of the branch.[19] All service between West Gloucester and Rockport was replaced by buses from June 1 to 30, 2019 to allow for construction.[20] On April 29, 2020, service between West Gloucester and Rockport was indefinitely replaced by buses due to a failure of the old bridge.[21] That June, the MBTA indicated the closure would continue until the completion of the bridge replacement in mid-2021.[22]

In February 2001, the MBTA began two parallel planning processes for the North Shore region: a Draft Environment Impact Statement for the Blue Line Extension (DEIS), and a Major Investment Study (MIS) for other projects primarily north of Salem. The MIS, released in 2004, identified a number of possible improvements to the Newburyport/Rockport Line, including upgrades to current stations, grade crossing eliminations, signal system improvements, increased frequencies, a second Salem tunnel, a branch line to Danvers, and new stations at Revere and South Salem.[23] A South Salem station would serve Salem State University, the North Shore Medical Center, and residential areas south of downtown Salem - some of which were served by the pre-1987 station, but only by the 455 and 459 buses thereafter. The station was estimated to cost $12.2 to $13.8 million, with a single island platform serving the line's two tracks, and would draw about 600 daily riders.[23] Two possible locations were considered: one with access from Laurel Street and the platform running to the north, and one with access from Ocean Avenue and the platform running to the south.[24][25]

None of the projects in the DEIS or MIS was actually built due to lack of funding, except for parking structures at Salem and Beverly which were mandated as Big Dig mitigation. In January 2015, Salem mayor Kim Driscoll indicated her support for a South Salem station in her State of the City address.[26] A feasibility study, released in March 2016, analyzed four possible station locations, including three sites near the MIS locations plus one at Jefferson Avenue to the south. The station would have two side platforms and cost between $15 million and $20 million depending on the site.[27] The study received mixed reactions from Salem residents, including concerns about construction, lights, and trains idling near a residential area but also hope for improved transit accessibility and higher property values.[28][29]

As of November 2016, a site off Canal Street near Lauren Street was considered the preferred alternative. Part or all of an adjacent industrial property could be purchased to provide pedestrian access and possibly a small parking lot on the west side of the tracks, improving access to the nearby North Shore Medical Center.[30][31]