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Investor-Owned Utilities' Electricity Distribution Lines That Are Underground or Covered
As Reported in June 2021

The utilities submit quarterly updates of their geographical data to the Office of Energy Infrastructure Safety as part of their wildfire mitigation plan process. These geographical data include the status of the utilities’ electricity distribution lines—specifically whether the distribution lines are buried underground, covered with insulation that could help prevent fires, or bare. The interactive graphic below shows a map of California’s counties, assembly districts, and senate districts, which are shaded based on the percentage of their distribution lines that are either “underground” or “covered.” To see a detailed breakdown of that region’s distribution lines, hover over any of the geographic regions to show additional details. For a detailed map of electricity distribution lines in a county, click the link at the bottom of the county details.

Please note that the data provided in these graphics are for general informational purposes only. They are not intended to be relied upon for decision‐making purposes, particularly any decisions about underground digging. The data are as of June 30, 2021. Contact the utilities directly for data for decision‐making purposes.

Source: Geographic data for primary and secondary distribution lines that Bear Valley Electric Service, PacifiCorp, Pacific Gas and Electric, Southern California Edison, and San Diego Gas and Electric reported to the Energy Safety Office, as of June 2021, and interviews with Energy Safety Office staff.

Note: Liberty Utilities did not provide consent to publish its detailed data.