What are foundation conditions like in Alva, Oklahoma?

Reviewed by Preston · Updated 2026-11-12

In short: Alva has a mix of ground: about 17% high shrink-swell soil, 39% moderate and 30% low ¹.

What does the soil survey show for Alva?

Alva covers about 6 square miles ² and had 5,028 people in the 2020 Census ².

Which soils matter most for houses in Alva?

• Hardeman, about 27% of the area ¹: Very deep, well drained, moderately rapidly permeable soils formed in moderately coarse textured eolian and alluvial sediments ³.
• Pond Creek, about 26% of the area ¹: Very deep, well drained soils that formed in calcareous loamy material high in silt and very fine sand which was derived from a combination of loess, alluvium, residuum from red beds ⁴.
• Burford, about 9% of the area ¹: Deep, well drained, slowly permeable soils formed in calcareous loamy material overlying silty redbeds ⁵.
• Grant, about 8% of the area ¹: Deep, well drained, moderately permeable soils ⁶.
• Bethany, about 8% of the area ¹: Very deep, well drained soils that formed in loess or alluvium of Pleistocene age over shale of Permian age ⁷.

What does this mean for houses in Alva?

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 Alva?

Looking for a foundation company near Alva?

Companies that serve Alva 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 Alva? 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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• Shrink-swell and the active zone