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What are foundation and soil conditions in ZIP code 73102 (Oklahoma City)?

Reviewed by Preston ยท Updated 2026-11-12

In short: Most of ZIP code 73102, about 100%, is mapped as urban land: ground covered by buildings and pavement that the soil survey does not classify 1. So the map says little about the soil under a given house here; nearby ZIP codes show what is likely underneath, and a soil boring settles it.

What does the soil survey show for 73102?

ZIP code 73102 covers about 1 square mile of land and had 3,072 people in the 2020 Census 2; its center falls in Oklahoma City.

Measure Share of the area
High shrink-swell soil (linear extensibility 6% or more) 0% 1
Moderate shrink-swell (3% to under 6%) 0% 1
Low shrink-swell (under 3%) 0% 1
Somewhat poorly or poorly drained 0% 1
Water table within 2 feet at some time of year 0% 1
Bedrock within 40 inches (soft or hard) 0% 1
Occasional or frequent flooding 0% 1

Which soils matter most for houses in 73102?

What does this mean for houses in 73102?

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 73102?

Soil Share
Urban land 100.0% 1

Looking for a foundation company near ZIP code 73102?

Companies that serve ZIP code 73102 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 73102? 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.

Free, plain-English answers. It asks a few questions and walks you to the repair that fits.

Common questions

How much expansive clay is in ZIP code 73102?

About 0% of the land in ZIP code 73102 is mapped in soils rated high shrink-swell, 0% moderate and 0% low, from the USDA soil survey.

What is the most common soil in 73102?

Most of the ZIP code is mapped as urban land or water.

Is there shallow rock or high groundwater in 73102?

Bedrock is within 40 inches under about 0% of the ZIP code, and a water table within 2 feet at some time of year under about 0%.

Does 73102 have flood-prone soils?

About 0% of the ZIP code is in soils the survey maps with occasional or frequent flooding.

Sources

  1. Soil Survey Geographic Database (SSURGO), queried through Soil Data Access, November 2026 USDA Natural Resources Conservation Service
  2. TIGERweb, 2020 Census: Incorporated Places and ZIP Code Tabulation Areas U.S. Census Bureau

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