What are foundation conditions like in Owasso, Oklahoma?

Reviewed by Preston · Updated 2026-11-11

In short: About 45% of Owasso is mapped in soils rated high shrink-swell and only about 1% low ¹. It also has one of the largest shares of poorly drained soil of the cities compared, about 57% ¹, so water perched on clay in winter and spring is a defining Owasso condition. Limestone ridges with shallow rock break up the clay in places.

How much of Owasso has expansive soil?

Owasso covers about 17 square miles ² across the Tulsa and Rogers county soil surveys ¹.

Which Owasso soils matter most for houses?

• Dennis, about 36% of the city, is very deep and somewhat poorly drained, with a perched water table 12 to 30 inches down from December through April ³.
• Pharoah is very deep and somewhat poorly drained, formed in fine-textured residuum, with a perched seasonal high water table 6 to 18 inches down from December to May ⁴.
• Okemah has a silty clay subsoil with slickensides and water perched 2 to 3 feet down in winter and spring ⁵.
• Shidler is very shallow to shallow over limestone and chert on convex uplands ⁶, and Catoosa is moderately deep over limestone ⁷. On these spots piers and footings meet rock much sooner.
• Coweta and Bates reach soft sandstone at 10 to 20 and 20 to 40 inches ⁸⁹.

What does so much perched water mean for Owasso houses?

A perched water table is a temporary, shallow layer of water held up by tight clay or shale below it. When it rises under a slab edge or into a crawl space in winter and spring, clay swells; when it disappears in summer, the same soil dries and shrinks ³⁴. Keeping roof and surface water away from the foundation matters more here than in drier, sandier cities; the ASCE homeowner guide calls for sloping soil away at least 3 inches over the first 5 feet and discharging downspouts at least 3 feet out ¹⁰. See groundwater and perched water and crawl space moisture.

Which soils cover Owasso?

ZIP codes in Owasso

ZIP 74055

Looking for a foundation company near Owasso?

Companies that serve Owasso 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 Owasso? 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's current 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 the shares above leave out minor inclusions and do not add to 100%. A soil counts as high, moderate or low shrink-swell by the linear extensibility of its most expansive layer, the survey's measure of how much a soil changes length between wet and dry (6% or more is rated 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 for the whole city, 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.

Related

• Tulsa metro soils
• Perimeter wetting heave
• Surface drainage and grading
• Shrink-swell and the active zone
• Compare Oklahoma cities