Survey Data

You can find survey data in the Engineering Records Center and Survey Office on the 47th floor of the Seattle Municipal Tower. Survey data includes:

  • Coordinate maps in NAD27
  • Quarter Section maps of the City of Seattle
  • Large Scale Profiles: approximately from 1900 to 1960
  • Survey field books which contain street monumentation information, monument ties, stationing data, level notes, topographic notes, cross-section notes, profile notes, easement locations, construction notes for paving, curbs, storm and sanitary sewers, water mains, light poles, bridges, and miscellaneous structures.

    The types of books available are:
    • Seattle Public Utilities (SPU) (Index in vault)
    • Seattle Engineering Dept: pre-1998 (some also in microfilm - Index in vault)
    • Seattle Water Department: pre-1998 (Index in Survey Office)
    • Seattle City Light Department: pre-1998 (Index in Survey Office)
  • Seattle Engineering Dept Land Survey Records
  • Water Dept Land Survey Records
  • Seattle City Light Land Survey Records


Vertical Control (Monument) Viewer

With this SPU application, you can research and download up-to-date information about the City of Seattle's survey monuments. It details the Vertical Control Network within the City’s service area. This tool is meant to replace the Seattle-area benchmark data found on the now-retired GSOW website. It is available in both map and text form, and its data is updated regularly by the SPU Survey team.


View the Vertical Control (Survey Monument) Map in a new window or tab.

Screenshot of survey monument map



Public Utilities

Andrew Lee, General Manager and CEO
Address: 700 5th Avenue, Suite 4900, Seattle, WA, 98104
Mailing Address: PO Box 34018, Seattle, WA, 98124-5177
Phone: (206) 684-3000

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Seattle Public Utilities (SPU) is comprised of three major direct-service providing utilities: the Water Utility, the Drainage and Wastewater Utility, and the Solid Waste Utility.