Please contact DWP for assistance. This is not a Library Collection, it is hosted for DWP. ; Researchers may view the collection in person at DWP by appointment only, Monday through Friday, 8am – 3pm. For information and appointments, contact Angela Tatum at (213) 367-8906. ; Photos that are published should properly credit the owner of the photo as “Historical Photo Collection of the Department of Water and Power, City of Los Angeles”.
West portal Mono Tunnel - Mono craters tunnel is distinguished for two reasons: it is one of the longest ever driven and it is the only tunnel in the U. S. ever to pass underneath an extinct volcanic cone.