Underground Service Alert of Southern California Servicing the following counties: Imperial Inyo Los Angeles Orange Riverside San Bernardino San Diego Santa Barbara Ventura Underground Service Alert of Northern California Servicing the following counties: Alameda, Alpine, Amador, Butte, Calaveras, Colusa, Contra, Costa, Del Norte, El Dorado, Fresno, Glenn, Humboldt, Kern, Kings, Lake, Lassen, Madera, Marin, Mariposa, Mendocino, Merced, Modoc, Mono, Monterey, Napa, Nevada, Placer, Plumas, Sacramento, San Benito, San Francisco, San Joaquin, San Luis Obispo, San Mateo, Santa Clara, Santa Cruz, Shasta, Sierra, Siskiyou, Solano, Sonoma, Stanislaus, Sutter, Tehama, Trinity, Tulare, Tuolumne, Yolo, Yuba Visit us at www.digalert.org Visit us at www.usanorth.org © 2010 Underground Service Alert of Southern California. All rights reserved. Nothing on this site may be reproduced for any reason without permission