Seattle underground utility map
See what's likely under any Seattle street: water mains, sewers, gas, electric and telecom lines, drawn in 3D from the city's own public records. Free, with no account.
Open the Seattle mapWhere the lines come from
Street permits show which utility dug on which block. Subsola reads Seattle Department of Transportation’s Street Use utility permits. Puget Sound Energy, Seattle City Light, CenturyLink and Comcast don't publish where their lines run, so their gas, electric and telecom lines are placed on the blocks those permits name, at the depths the codes require. Each line on the map says how it was placed and how sure that is.
Where the city or a utility maps its own lines, they're drawn on those routes, from Seattle Public Utilities’ Water Distribution Mains (10" & Smaller), Sewer and drainage mainlines, and Side sewers (non-SPU owned non-mainlines) and Seattle City Light’s Electrical lines, generalized. The public water layer holds only distribution mains, 10 inches and smaller, so larger water mains come from permits. City Light generalizes its map for public use.
Lead service lines
SPU says it has no known lead service lines. Its layer gives the material of the city's part of each service, which the lot report shows.
Before you dig, call 811
Subsola is research, not a utility locate. Washington law requires a free locate request to Washington 811 two full business days before digging, so the utilities can mark their lines on the ground.
Sources
- Street Use utility permitsSeattle Department of Transportation. City of Seattle open data; provided without warranty.
- Water Distribution Mains (10" & Smaller)Seattle Public Utilities. City of Seattle open data; provided without warranty.
- Sewer and drainage mainlinesSeattle Public Utilities. City of Seattle open data; provided without warranty.
- Side sewers (non-SPU owned non-mainlines)Seattle Public Utilities. City of Seattle open data; provided without warranty.
- Electrical lines, generalizedSeattle City Light. City of Seattle open data; provided without warranty.
- Water servicesSeattle Public Utilities. City of Seattle open data; provided without warranty.
The map also draws hydrants, inlets, street lights and signals, and streets and buildings, from the city's open data. Every card on the map names the record it came from.