Los Angeles is restoring a century-old water tunnel to capture runoff from the Sierra Nevada, which had a record snowfall this winter after years of drought. The Department of Water and Power is spending $4.5 million to repair and reopen a 2-mile-long tunnel that once carried water from the Los Angeles Aqueduct to a now-defunct reservoir, the Los Angeles Daily News reported. The tunnel is part of the Maclay Highline system of channels and tunnels that supplied water to homes and farms in Sylmar and the Sunland-Tujunga area.