What are foundation and soil conditions in ZIP code 73008 (Bethany)?

Reviewed by Preston · Updated 2026-11-12

In short: ZIP code 73008 has a mix of ground: about 17% high shrink-swell soil, 2% moderate and 36% low ¹.

What does the soil survey show for 73008?

ZIP code 73008 covers about 8 square miles of land and had 21,592 people in the 2020 Census ²; its center falls in Bethany.

Which soils matter most for houses in 73008?

• Konawa, about 14% of the area ¹: Very deep, well drained soils that formed in sandy and loamy alluvium of Pleistocene age ³.
• Teller, about 14% of the area ¹: Very deep, well drained, moderately permeable soils that formed in loamy sediments of Pleistocene age ⁴.
• Bethany, about 7% of the area ¹: Very deep, well drained soils that formed in loess or alluvium of Pleistocene age over shale of Permian age ⁵.
• Derby, about 4% of the area ¹: Very deep, somewhat excessively drained soils that formed in sandy eolian sediments of Pleistocene age ⁶.
• Gracemont, about 3% of the area ¹: Very deep, somewhat poorly drained, moderately or moderately rapidly permeable soils formed in calcareous sandy and loamy alluvium of Recent age ⁷.
• Urban land, about 38%, is ground the survey maps as covered by buildings and pavement rather than classifying its soil ¹.
• Water, about 5%, is open water ¹.
• Kirkland, about 4%, is land the survey does not rate as soil ¹.

What does this mean for houses in 73008?

Mixed ground. No single hazard dominates here, so what matters is the soil under a particular house: clay that swells and shrinks with the seasons, fill on graded lots, and water around the foundation. See shrink-swell and the active zone and surface drainage and grading.

Which soils cover 73008?

Looking for a foundation company near ZIP code 73008?

Companies that serve ZIP code 73008 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 ZIP code 73008? 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 ZIP code tabulation area (the Census approximation of a ZIP code) 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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• Shrink-swell and the active zone