Know what‘s below.
Contact 811 before you dig

Helping You Dig Safely


USA North 811 provides a free and effective Damage Prevention Service that protects the communities and underground facilities in Central / Northern California, and Nevada.



USA North 811 began operation in May of 1975 & incorporated as a 501 (c)(6) Non Profit Mutual Benefit Corporation in 1986. Our objective is to receive planned excavation reports from public or private excavators and to transmit those planned excavation reports to all participating utility members of USA North 811 who may have facilities in and around that excavation site. Our members will either: 1) mark or stake the horizontal path of their facility, 2) provide information about the location of their facility, or 3) advise the excavator of clearance, for facilities that they own.

Organizational Structure

  • board_directors
    Board of Directors 25
    • Charter 10
    • Participating 15
    • Stakeholder 3
  • members
    Members 1,485
    • California 1,274
    • Nevada 200
    • Sustaining 8
    • Stakeholder 3
  • employees_icon
    Employees 51

    Located in
    Concord, CA


California (Central and Northern 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
Nevada (Entire State)
    • Carson
    • Churchill
    • Clark
    • Douglas
    • Elko
    • Esmeralda
    • Eureka
    • Humboldt
    • Lander
    • Lincoln
    • Lyon
    • Mineral
    • Nye
    • Pershing
    • Storey
    • Washoe
    • White Pine

List of Holidays

The following is a list of Holidays recognized by California and Nevada. Both California and Nevada One-Call Laws do not allow Federal or State Holidays to be included as part of the legal notice for the excavation notification. For holidays that occur on Saturdays, USA NORTH 811 will observe the holiday the Friday before the holiday. For holidays that occur on Sundays, they will be observed on the following Monday.

Holidays State Center
New Years Day CA/NV Closed
Martin Luther King Jr. CA/NV Closed
Lincoln’s Birthday CA Open
Presidents Day CA/NV Closed
Cesar Chavez Day CA Open
Memorial Day CA/NV Closed
Independence Day CA/NV Closed
Labor Day CA/NV Closed
Columbus Day CA Open
Nevada Day NV Open
Veterans Day CA/NV Closed
Thanksgiving Day CA/NV Closed
Day After Thanksgiving CA/NV Closed
Christmas Day CA/NV Closed

If you are calling to have a utility line locate done at a site, please dial 8-1-1 to be connected to our contact center where an agent will process your request.  If you would like to submit your request online, please visit 



If you are not attempting to request a utility line marking and instead need to get in touch with our business office for any other reason, please click here