Locating Underground Utilities

Last Updated: 7-17-2017Print page

Photo of people planting a tree in the landscape/furniture zone with nearby flags showing utility locations.

The locations of underground utilities can be obtained by calling the One Number Locator Service (ONLS) hotline (1(800) 424-5555) of the Utility Underground Location Center and requesting the location of underground utilities except side sewers. Staff from the center will mark the locations of all known public and private utilities in the right-of-way. The applicant can learn the location of a side sewer through SDOT’s Street Use Section. Knowing these locations in advance may save time and money during design and construction and will help to prevent causing serious damage to utilities. Information on existing utilities and new utilities required for the project must be included on the street improvement plans submitted to Street Use.