⟁ Washington Well Data field records · 2026 survey

Washington Well Data › Cowlitz County › Castle Rock (98611)

Castle Rock, WA (98611): well depth, water level & drilling cost

✓ 853 Ecology records · Cowlitz County

180 ftmedian well depth
102 ft–283 fttypical depth range
62 ftmedian static water level
12 gpmmedian yield (477 tests)

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How deep are wells in Castle Rock (98611), Washington?

The median drilled well depth in Castle Rock (98611) is 180 ft, based on 847 wells with recorded depths in the state Ecology database. Half fall between 102 ft and 283 ft; 90% are shallower than 423 ft.

How much does it cost to drill a well in Castle Rock (98611)?

Applying published per-foot rates to the local median depth of 183 ft: drilling and casing alone typically runs $4,575–$11,895; a complete system including pump, pressure tank, and hookup typically runs $10,980–$18,300. Actual quotes depend on site access, geology, and casing requirements.

What is the static water level in Castle Rock (98611)?

The median static water level is 62 ft below ground surface (middle half of wells: 32 ft–113 ft), from 409 measurements.

Drilled depth distribution

0–50 ft 62 50–100 ft 129 100–150 ft 151 150–200 ft 113 200–300 ft 188 300–400 ft 89 400–600 ft 86 600+ ft 29
Looking at a specific property in Castle Rock (98611)?

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Get quotes from drillers who work in Castle Rock (98611)

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Part of Cowlitz 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.