What are foundation conditions like in Poteau, Oklahoma?

Reviewed by Preston · Updated 2026-11-12

In short: Poteau has a mix of ground: about 18% high shrink-swell soil, 42% moderate and 20% low ¹. The soil survey also maps a water table within 2 feet of the surface at some point in the year under about 54% of it and occasional or frequent flooding on about 48% ¹. Which of these a house sits on decides whether clay swell, water, rock or soft ground is the thing to watch.

What does the soil survey show for Poteau?

Poteau covers about 27 square miles ² and had 8,807 people in the 2020 Census ².

Which soils matter most for houses in Poteau?

• Neff, about 33% of the area ¹: Very deep, moderately well drained, moderately slowly permeable soils that formed in loamy alluvium ³.
• Bengal, about 10% of the area ¹: Moderately deep, well drained, slowly permeable soils ⁴.
• Sallisaw, about 7% of the area ¹: Deep, well drained, moderately permeable soils that formed in loamy and gravelly alluvium or valley fill ⁵.
• Cupco, about 5% of the area ¹: Very deep, very poorly drained, moderately slowly permeable soils that formed in loamy alluvial sediments of Quaternary age ⁶.
• Clebit, about 4% of the area ¹: Shallow, well drained, moderately rapidly permeable soils over hard sandstone that is tilted about 40 degrees from horizontal ⁷.
• Water, about 8%, is open water ¹.

What does this mean for houses in Poteau?

Shallow water. A water table near the surface, often perched on tight clay or shale in winter and spring, keeps soil at slab edges and in crawl spaces wet and swollen. See groundwater and perched water, crawl space moisture and surface drainage and grading.

Flood-prone soils. Floodplain soils are layered stream deposits: softer, wetter and more variable than upland soils, and they flood. See soft soil consolidation and Quaternary alluvium and terraces.

Which soils cover Poteau?

Looking for a foundation company near Poteau?

Companies that serve Poteau 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 Poteau? 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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