The tunnel is 3.1 miles long and consists of twin 21 foot diameter tunnels. There is one station within the tunnel at Washington Park, the second deepest such station in the world. The tunnel has won several worldwide engineering and environmental awards. It was placed into service September 12, 1998.
Total length: 16,368.0 ft. (3.1 mi.)
Deck width: 21.0 ft.
MAX - West Hills Tunnel
Approximate latitude, longitude
+45.50632, -122.75383(decimal degrees) 45°30'23" N, 122°45'14" W (degrees°minutes'seconds")