What are foundation conditions like in Yukon, Oklahoma?

Reviewed by Preston · Updated 2026-11-11

In short: Yukon is mostly river ground: floodplain and terrace soils such as Dale, Norge, Gracemore, Brewer and Canadian cover more than half the city ¹. Only about 16% rates high shrink-swell, but about 50% rates moderate ¹, so movement is usually milder than on Moore's clay, and flooding and soft stream sediment matter more.

How much of Yukon has expansive soil?

Yukon covers about 26 square miles ², all in the Canadian County soil survey ¹. About 8% of the city is somewhat poorly or poorly drained ¹.

Which Yukon soils matter most for houses?

• Dale, about 23% of the city, is very deep and well drained, formed in loamy stream sediment on floodplains, with silt loam to clay loam layers rather than heavy clay ³.
• Norge, about 16%, is deep and well drained, on old upland terraces, with a silty clay loam subsoil less clayey than Kirkland or Renfrow ⁴.
• Gracemore is very deep and somewhat poorly drained, formed in calcareous sandy alluvium on broad floodplains, and water moves through it quickly ⁵.
• Brewer is very deep, moderately well drained and slowly permeable, formed in loamy and clayey alluvium on floodplains subject to rare flooding ⁶.
• Canadian is very deep and well drained, on low terraces or high floodplains subject to rare flooding ⁷. Watonga is very deep, very slowly permeable, formed in calcareous loamy and clayey alluvium on floodplains ⁸.

What does river ground mean for Yukon houses?

Floodplain soils are layered stream deposits, so they can change from sand to clay over short distances, and their main risks are flooding and soft, wet layers rather than strong clay swell ³⁵. See soft soil consolidation and Quaternary alluvium and terraces.

Which soils cover Yukon?

ZIP codes in Yukon

ZIP 73099

Looking for a foundation company near Yukon?

Companies that serve Yukon 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 Yukon? 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.

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