Complex sentence: In 1904, the railroad had negotiated with John Alexander Dowie for a franchise to operate through Zion City and the route was subsequently constructed south, reaching Waukegan in the summer of 1905.
Split into simpler sentences: In 1904, the railroad had negotiated with John Alexander Dowie for a franchise to operate through Zion City. The route was constructed south from Zion, reaching Waukegan in the summer of 1905.