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King County, Washington: records in the National Inventory of Dams

King County, Washington had 93 records in the inventory, 61 of them high hazard, as of October 30, 2026, according to the National Inventory of Dams.

The NID prints the county as King. A count is of records, which include the separate structures recorded with a dam.

King County, Washington, October 2026

61
High-hazard records
October 2026
1st of 38 counties the NID names in Washington; 65.6% of the county’s 93 records. A hazard class is not a risk.
58
High hazard, condition published
October 2026
2 rated Poor or Unsatisfactory.
3
High hazard, condition not published
October 2026
3 not provided to the NID, 0 with no condition assessment in its file.

Records by hazard class

1 more column on a wider screen

The 93 records the NID places in King County, Washington, by the hazard class the responsible agency assigned, October 2026. A class is the consequence of a failure, not its likelihood.
Hazard classRecords
High61
Significant10
Low22
Undetermined0

Every record in King County

High hazard first, then by Federal ID. Each opens the record’s own page, with every field the NID publishes for it. Names are the NID’s, as printed.

2 more columns on a wider screen

The 93 records the National Inventory of Dams lists in King County, Washington, with the hazard class and the condition assessment of each, as of October 30, 2026
Federal IDDam nameHazard class
WA00177Tolt River - South ForkHigh
WA00180Tuck Lake DamHigh
WA00186Radar Lake DamHigh
WA00194Welcome Lake DamHigh
WA00200Marcel Lake DamHigh
WA00201Lake Kittyprince DamHigh
WA00210Volunteer Park Reservoir SeattleHigh
WA00212Roosevelt ReservoirHigh
WA00217Lake Forest Park ReservoirHigh
WA00236Margaret Lake DamHigh
WA00238Regulating Basin West DamHigh
WA00238S001Regulating Basin South DamHigh
WA00254Youngs Lake Outlet DamHigh
WA00255Masonry DamHigh
WA00298Howard A. Hanson DamHigh
WA00300Mud Mountain DamHigh
WA00301Hiram M. Chittenden Locks and DamHigh
WA00380Southwest Genesee Street Detention DamHigh
WA00415Youngs Lake New Inlet DamHigh
WA00483Boeing Creek M1 Detention DamHigh
WA00559Yellow Lake Outlet DikeHigh
WA00582Upper Mill Creek Stormwater Detention DaHigh
WA00602Klahanie Stormwater Detention Dam No 13High
WA00636Weyerhaeuser Enumclaw Flood Control DamHigh
WA00648Newcastle Railroad Embankment DamHigh
WA00650Garrison Creek 98th Avenue Detention DHigh
WA00671Seattle Port Lagoon No 3High
WA00680Issaquah Highlands Reid Pond DamHigh
WA00688Issaquah Highlands South Pond DamHigh
WA00692Des Moines Ck Reg Det Pond West BermHigh
WA00693Des Moines Ck Reg Det Facility East BermHigh
WA00707Issaquah Highlands Falls Pond DamHigh
WA01337Peterson Stormwater Detention DamHigh
WA01443Mill Creek Canyon Stormwater Detention DHigh
WA01649Des Moines Creek Stormwater Detention DaHigh
WA01651Lakemont Stormwater PondHigh
WA01668Springwood Stormwater Detention DamHigh
WA01716Mill Pond Stormwater Detention DamHigh
WA01733Panther Lake Detention DamHigh
WA01737Panther Lake Ballfield DamHigh
WA01747Panther Lk First Avenue Bas Detent PondHigh
WA01754South 336th Street Stormwater Dam No 1High
WA01767South 336th Street Stormwater Dam No 2High
WA01782Boeing Creek Park North Pond DamHigh
WA01787Trossachs Detention Pond Pc-3High
WA01802Redmond Ridge Cedar DamHigh
WA01804Snoqualmie Ridge Osprey Ct Pond D1High
WA01820South Ridge Stormwater Detention DamHigh
WA01833Trossachs Detention Pond Pc-2High
WA01837Redmond Ridge Drive Ec 4n Roadway DamHigh
WA01844Talus P5 Stormwater Detention DamHigh
WA01858Issaquah Highlands Np2 Pond DamHigh
WA01862Madsen Creek West Basin DamHigh
WA01867Issaquah Highlands Npe PondHigh
WA01883Muth Stormwater PondHigh
WA01892Redmond Ridge East Pond Srn 2 No 1High
WA01908Newcastle Vista Pond 3High
WA01922Redmond Ridge East Srs 1 Pond No 1High
WA01972Seatac Airport Pond GHigh
WA01999Johnson Pond DamHigh
WA02038Seatac Airport Pond MHigh
WA00209Youngs Lake Cascades DamSignificant
WA00577Garrison Creek Stormwater Detention DamSignificant
WA00618Miller Creek Regional Detention FacilitySignificant
WA00741Icon Materials Sediment Pond 6Significant
WA01484Klahanie Stormwater Detention Dam No 1Significant
WA01815Quadrant East Campus Parcel 1Significant
WA01819204th Street Stormwater Detention BasinSignificant
WA01901Seatac Airport Se PondSignificant
WA02061Cedar Hills Landfill Csw PondSignificant
WA02062Conner Jarvis East PondSignificant
WA00187Loutsis DamLow
WA00191Weyerhaeuser DamLow
WA00192Jean Lake DamLow
WA00193Loreene Lake DamLow
WA00256Morse Lake Overflow DikeLow
WA00295Snoqualmie FallsLow
WA00307Snoqualmie Mill Pond DamLow
WA00339Ravensdale PitLow
WA00477Bellevue Detention Pond 133Low
WA00478Bellevue Detention Pond 197Low
WA00479Bellevue Detention Pond 165Low
WA00613High Woodlands Stormwater Detention DamLow
WA00656Snoqualmie Ridge Golf Course Pond M1Low
WA00683Icon Materials Pond 4Low
WA00727Tukwila South Project South PondLow
WA01177Sawyer Lake Outlet StructureLow
WA01398Bellevue Detention Pond 179 NorthLow
WA01633Queens Bog DamLow
WA01647I405 Coal Creek Stormwater Detention DaLow
WA01675Boeing Auburn Drainage Ditch Detention DLow
WA01740Quadrant Lake No 1Low
WA01818Aldarra Pond Dfr1Low

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Sources

Compiled automatically from National Inventory of Dams — national CSV by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved