What are foundation conditions like in Bethany, Oklahoma?

Reviewed by Preston · Updated 2026-11-12

In short: Only about 9% of Bethany is mapped in high shrink-swell soil; 46% rates low ¹.

What does the soil survey show for Bethany?

Bethany covers about 5 square miles ² and had 20,831 people in the 2020 Census ².

Which soils matter most for houses in Bethany?

• Konawa, about 20% of the area ¹: Very deep, well drained soils that formed in sandy and loamy alluvium of Pleistocene age ³.
• Teller, about 17% of the area ¹: Very deep, well drained, moderately permeable soils that formed in loamy sediments of Pleistocene age ⁴.
• Derby, about 6% of the area ¹: Very deep, somewhat excessively drained soils that formed in sandy eolian sediments of Pleistocene age ⁵.
• Bethany, about 6% of the area ¹: Very deep, well drained soils that formed in loess or alluvium of Pleistocene age over shale of Permian age ⁶.
• Dougherty, about 2% of the area ¹: Very deep, well drained soils that formed in sandy and loamy sediments on terraces of Pleistocene age ⁷.
• Urban land, about 41%, is ground the survey maps as covered by buildings and pavement rather than classifying its soil ¹.

What does this mean for houses in Bethany?

Less clay, different problems. Sandy and loamy soils swell little, so movement more often comes from fill settlement, erosion and washouts or plumbing leaks.

Which soils cover Bethany?

ZIP codes in Bethany

ZIP 73008

Looking for a foundation company near Bethany?

Companies that serve Bethany can appear on the company map in the Homeowner Hub. Paid listings there are marked Sponsored; the library and the AI guide don't rank or recommend any of them.

Buying or selling a house in Bethany? Realtors who serve the area can be on the same map, also marked Sponsored, and for realtors covers the seller disclosure form, inspections and the sale timeline. Seeing cracks at home? Start with for homeowners.

How were these numbers measured?

We overlaid the city limits from the Census Bureau ² on the USDA soil survey's map units ¹ and added up the area of each soil. Where a map unit is a mix of soils, its area was split by the percentages the survey lists for its major soils, so shares leave out minor inclusions and do not add to 100%. Shrink-swell is rated by the linear extensibility of a soil's most expansive layer, the survey's measure of how much it changes length between wet and dry (6% or more is high). Water table, bedrock and flooding come from the survey's map-unit summaries: the shallowest water table in any month, the shallowest bedrock, and the most common flooding frequency. Bedrock here includes soft, weathered sandstone and shale that a pier can push through, so it is not the depth where piers stop. These are mapped averages, not a test of any one lot; fill, grading and the soil actually under a house can differ, which is why a site visit or soil boring still decides a repair.

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