Complex sentence: Swift Island Ferry Bridge, the water's old crossing was abandoned in the mid- 2000s, and parallels the new four-lane bridge which replaced it; this bridge was a narrow two-lane concrete arch bridge built in 1929.
Split into simpler sentences: Swift Island Ferry Bridge, the water's old crossing was abandoned in the mid- 2000s, and parallels the new four-lane bridge which replaced it. It was was a narrow two-lane concrete arch bridge built in 1929.