Fall River, Warren and Providence Railroad

The branch split from the Providence, Warren and Bristol Railroad at Warren Station eastward through Swansea and Somerset, crossing over the Kickemuit, Cole, Lee and Taunton rivers; the Slade's Ferry Bridge carried both the railroad and road traffic. Despite its proximity to the Fall River Branch route, the Dighton and Somerset Railroad had its own drawbridge across the Taunton River four miles upriver at Mallard's point. The FRW&P met the Fall River mainline at Fall River Station where transfers could be made to other Old Colony lines.

Like the PW&B mainline, the Fall River Branch was completely electrified in 1900 with a 600 Volt DC single-wire trolley system under New Haven ownership. The New Haven had originally envisioned the eventual electrification of most commuter rail lines in the South Coast of Massachusetts; however, these plans were indefinitely postponed due to cost.[3] A battery station was constructed on Brayton Point adjacent to the Slade's Ferry Bridge in Somerset; during rush hour periods, the battery stations would pick up some of the load, easing the burden on the Warren powerhouse. The branch was operated similarly to an interurban service under electrification. Electrification was never extended beyond Bowenville (Fall River) Station.

The Fall River Branch was beginning to see a steady decline in ridership by the early 1930s. In 1932, the Slade's Ferry Bridge was destroyed when a passing ship attempted to navigate past the swing section and collided with it. Since the Fall River Branch had no connection to the Dighton and Somerset line, it could no longer cross the Taunton River; this in effect ended all PW&B passenger service to Fall River. The Slade's Ferry Bridge was then renovated soon after and the unneeded railroad span removed.[4]

Electric service was cut back the same year before being entirely ceased on the PW&B in 1934. The New Haven received ICC permission to abandon the line from East Warren to Slade's Ferry Bridge on June 11, 1937.[5] The Slade's Ferry Bridge was subsequently bought by the state of Massachusetts as a highway bridge, with a lift drawbridge replacing the original swing section. The completion of the much higher Braga bridge (I-195) rendered the Slade's Ferry bridge a hazard to navigation and was demolished around 1965.[4]

Unlike the Bristol Secondary, little remains of the former Fall River Branch. Since the line had not been rail-banked, the line has been substantially built over. A 1-mile segment reopened as the Warren Bike Path in 2010.[6] An expansion of the bike path in Warren began in 2021, including the rebuilding of the former bridge over the Kickemuit River, left destroyed after the 1938 Hurricane. The project is scheduled for completion in 2023.[7] Some station structures, such as the former Touisset station in Swansea, are now private homes. The former Brayton Point battery station remains abandoned a few hundred feet west from the Somerset abutment of the former Slade's Ferry Bridge. Several bridge abutments are still extant in Swansea and Somerset.