 Constructed early in the 20th century by railroad magnate George J. Gould for the Wabash Railroad, it was closed to trains and cars between 1946 and 2004.The tunnel is arguably the most unreliable tunnel in the city of Pittsburgh, as it continually experiences closures due to malfunctioning gates, malfunctioning signals, electrical failures, and damaged water lines.Conceived in the late 1800s, the tunnel was built in 1903 for Gould's Wabash Pittsburgh Terminal Railway venture into Pittsburgh, which failed in 1908.