What are foundation and soil conditions in ZIP code 74011 (Broken Arrow)?

Reviewed by Preston · Updated 2026-11-12

In short: Only about 7% of ZIP code 74011 is mapped in high shrink-swell soil; 62% rates low ¹. The soil survey also maps occasional or frequent flooding on about 14% ¹.

What does the soil survey show for 74011?

ZIP code 74011 covers about 24 square miles of land and had 31,803 people in the 2020 Census ²; its center falls in Broken Arrow.

Which soils matter most for houses in 74011?

• Okay, about 34% of the area ¹: Very deep, well drained, moderately permeable soils that formed in material weathered from loamy alluvium of Pleistocene age ³.
• Newtonia, about 8% of the area ¹: Very deep well drained soils that formed in loess and residuum of the Cherokee Prairies ⁴.
• Dennis, about 6% of the area ¹: Very deep, somewhat poorly drained soils that formed in residuum weathered from shale of Pennsylvanian age ⁵.
• Choska, about 6% of the area ¹: Very deep, well drained, soils on low terraces of flood plains ⁶.
• Radley, about 5% of the area ¹: Very deep, moderately well drained soils that formed in stratified silty alluvium ⁷.
• Water, about 8%, is open water ¹.

What does this mean for houses in 74011?

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.

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 74011?

Looking for a foundation company near ZIP code 74011?

Companies that serve ZIP code 74011 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 74011? 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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