The original horsecar trolley, operated by the Springfield Street Railway, opened in 1877 from Main Street in Springfield to Elm and Park Streets, via Main Street and the old toll bridge at Bridge Street. It was later extended via Westfield Street to (Upper) Church Street. Electrification was completed in 1892–3, and the river crossing was moved to the original North End Bridge. Over the years, extensions were made to the Holyoke Street Railway (via Riverdale Road, 1895), Tatham (1896) the Woronoco Street Railway (in Westfield, 1899), the Connecticut border via Riverside Park (now Six Flags New England) in Agawam (1900), Feeding Hills (1902), and eventually the Suffield Street Railway in Connecticut (making the Hartford-West Side Line possible, 1905).