Complex sentence: The Laurel Line Tunnel (also known as the Crown Avenue Tunnel) in South Scranton, at 4,750-feet, is one of the longest interurban streetcar tunnels ever built (1904) and was recently rehabilitated at a cost of over $3 million.
Split into simpler sentences: The Laurel Line Tunnel (also known as the Crown Avenue Tunnel) in South Scranton, constructed in 1904, remains one of the longest interurban streetcar tunnels ever built, at 4,750-feet. It was recently rehabilitated at a cost of over $3 million.