⟁ Washington Well Data field records · 2026 survey

Washington Well Data › Grant County › Coulee City (99115)

Coulee City, WA (99115): well depth, water level & drilling cost

✓ 255 Ecology records · Grant County

145 ftmedian well depth
100 ft–246 fttypical depth range
138 ftmedian static water level
28 gpmmedian yield (65 tests)

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How deep are wells in and around Coulee City (99115), Washington?

The median drilled well depth in and around Coulee City (99115) is 145 ft, based on 249 wells with recorded depths in the state Ecology database. Half fall between 100 ft and 246 ft; 90% are shallower than 445 ft.

How much does it cost to drill a well in and around Coulee City (99115)?

Applying published per-foot rates to the local median depth of 145 ft: drilling and casing alone typically runs $3,625–$9,425; a complete system including pump, pressure tank, and hookup typically runs $8,700–$14,500. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in and around Coulee City (99115)?

The median static water level is 138 ft below ground surface (middle half of wells: 56 ft–243 ft), from 56 measurements.

Drilled depth distribution

0–50 ft 5 50–100 ft 57 100–150 ft 67 150–200 ft 31 200–300 ft 39 300–400 ft 18 400–600 ft 24 600+ ft 8
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Part of Grant County well records.

Method: medians computed from Ecology records (water wells only — soil/environmental borings and decommissions excluded; depths 0–5,000 ft), grouped by ZIP from the recorded address. Cost estimate applies published per-foot ranges to the local median depth — full methodology & sources.