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

Grant County, Washington had 45 records in the inventory, 11 of them high hazard, as of October 30, 2026, according to the National Inventory of Dams.

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

Grant County, Washington, October 2026

11
High-hazard records
October 2026
9th of 38 counties the NID names in Washington; 24.4% of the county’s 45 records. A hazard class is not a risk.
7
High hazard, condition published
October 2026
0 rated Poor or Unsatisfactory.
4
High hazard, condition not published
October 2026
4 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 45 records the NID places in Grant 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
High11
Significant8
Low26
Undetermined0

Every record in Grant 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 45 records the National Inventory of Dams lists in Grant County, Washington, with the hazard class and the condition assessment of each, as of October 30, 2026
Federal IDDam nameHazard class
WA00088Priest RapidsHigh
WA00261Dry Falls DamHigh
WA00266North DamHigh
WA00268O'sullivan DamHigh
WA00269Pinto DamHigh
WA00658Coulee City Wastewater LagoonHigh
WA01943Lawrence Orchards DamHigh
WA01971Koehn Ranch ReservoirHigh
WA01974Chiawana Frenchman Hills DamHigh
WA01998Evans Desert Aire PondHigh
WA02009Partridge Ranch DamHigh
WA00756Ob-3 Warden Digester LagoonSignificant
WA00765Quincy Brine Evaporation PondsSignificant
WA01595Quincy Aerated Lagoon No 1Significant
WA01596Quincy Aerated Lagoon No 2Significant
WA01825Ingredion Process Water LagoonSignificant
WA01927Coulee City Wastewater Lagoon Cell 4Significant
WA02068Chiawana Rd O Sw PondSignificant
WA02069Quincy Sludge Storage Lagoon System Lagoons 1 2 and 3Significant
WA00017Mcdonald DamLow
WA00037Moran Slough DikeLow
WA00043Lyon Lake DamLow
WA00070Higginbotham Reservoir DamLow
WA00075Rearing Pond DikeLow
WA00128Moses Lake South DamLow
WA00129Moses Lake North DamLow
WA00271Soda Lake DikeLow
WA00314Alkali LakeLow
WA00316Columbia Marsh Unit #1 DamLow
WA00374Merry DamLow
WA00375Lenice DamLow
WA00409Carnation Waste Pond No 7Low
WA00467Lindblad Brothers DamLow
WA00645Nestle Potato Effluent LagoonLow
WA00654George City Wastewater Treatment LagoLow
WA00679Smith Brothers Dairy Storage LagoonLow
WA00702Simplot Lrar LagoonLow
WA00723Rec Silicon Wastewater PondLow
WA00749Columbia Marsh Unit #1 Pond No. 3 DamLow
WA00763B & G Bench Pond DamLow
WA00790Crab Creek Flood Flat Water Control StructureLow
WA01785Pacific Nw Sugar CO Sedimentation PondLow
WA01786Pacific Nw Sugar CO Condensation PondLow
WA01807Port of Moses Lake LagoonLow
WA10011Columbia Marsh Unit #2 DamLow

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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