What is Pond Creek soil and how does it affect Oklahoma foundations?

Reviewed by Preston, Oklahoma foundation repair consultant · Updated 2026-10-14

In short: Pond Creek is a deep, well-drained silty soil on the broad wheat-growing uplands of north-central Oklahoma. It formed partly in loess (windblown silt) and has a thick dark topsoil over silty clay loam. Its moderate clay content and well-drained setting mean water management around the house, and checking for collapse where loess is involved, are the main foundation topics.

What is Pond Creek soil?

Pond Creek is an official USDA soil series classified as "Fine-silty, mixed, superactive, thermic Pachic Argiustolls" ¹. It formed in calcareous loamy material high in silt and very fine sand, derived from loess, alluvium and residuum from red beds ¹. It sits on the treads of paleoterraces (old, high terraces) on broad uplands, with slopes of 0 to 8 percent ¹.

The series occurs in the Central Rolling Red Prairies (MLRA 80A) of north-central Oklahoma and south-central Kansas and is rated as extensive ¹. The type location is in Garfield County, about half a mile north of Carrier, and the series was established in Grant County in 1931 ¹. Mean annual precipitation is about 32 inches (range 27-36) ¹. Most areas are cropped to wheat and other small grains ¹.

In Oklahoma, Pond Creek falls in the North-Central (Red Prairies and Wheat Belt) region, on Quaternary alluvium and terraces and red beds such as the Hennessey Shale.

What does a Pond Creek soil profile look like?

Source for the table: ¹. Other properties from the official description ¹:

• Drainage: well drained; permeability moderate; saturated hydraulic conductivity moderately high ¹.
• Topsoil: the dark mollic layer is 40 to 49 inches thick ¹.
• Depth to bedrock: more than 60 inches ¹.
• Carbonates: secondary calcium carbonate at 40 to 80 inches ¹.

What does Pond Creek soil mean for foundations?

Shrink-swell

The USDA rates shrink-swell as linear extensibility, the linear expression of volume change from moist to oven-dry: under 3 percent low, 3 to 6 percent moderate, 6 to 9 percent high ⁴. Pond Creek's subsoil is silty clay loam with clay rising to as much as 45 percent in its lower part ¹. The rated value for each mapped unit is in Web Soil Survey ². Clayey soils swell as they gain water and shrink as they dry, and uneven wetting or drying around a house is what drives damaging movement ⁵.

Loess and collapse

Collapsible soils are unsaturated soils whose particles rearrange and lose volume when wetted, often while carrying load ³. Engineering guidance lists windblown deposits, including loess, among the main collapsible deposit types, especially in arid and semi-arid climates ³. Pond Creek is derived partly from loess ¹, but its official description does not report collapse.

Collapse is confirmed by testing rather than by soil name. Caltrans guidance describes index tests (dry density, moisture, Atterberg limits) and direct oedometer testing under ASTM D4546, and recommends considering both ³. See collapsible and loess soils and hydrocollapse.

Water around the house

Moderate permeability ¹ lets water from roofs, sprinklers and leaks soak in. The ASCE Geo-Institute guide recommends discharging downspouts at least 3 feet from the foundation, keeping irrigation at least 5 feet away and finding and repairing plumbing leaks ⁵. Related pages: erosion, undermining and washout voids and fill consolidation settlement.

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