Coulee Dam, Washington Drillers and Service Providers

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Find reliable water well drillers, groundwater, and drought information in coulee dam, Washington. For new well installations, repairs, or regular upkeep, trust our listings.

Interactive Water Well Map – Estimate your new well's depth

Visit the Coulee Dam Water Well Map to view the water, irrigation, and geothermal wells.

Water Well Professionals in Coulee Dam, Washington – Water Well Drilling, Service, and Treatment

O'Connell Drilling & Supply
21B Brewster Airport Rd
Water Systems
Moomaw Drilling
Fogle Pump and Supply Inc.

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Water Well Terminology

MacroporeA large soil pore that can transmit water rapidly.

Learn about more terms in the glossary.

Coulee Dam Statistics

Geology
AquifierColumbia Plateau basaltic-rock aquifers
Rock FormationIgneous and metamorphic-rock aquifers
Well Information*
Well Depth-- (ft)
SWL-- (ft)
Bedrock Depth-- (ft)
Yield-- (gpm)
* Average within 5km
Drought Monitor
October 21, 2025D2 
October 14, 2025D2 
October 7, 2025D2 
September 30, 2025D2 
September 23, 2025D2 
September 16, 2025D2 
September 9, 2025D2 
September 2, 2025D2