Aggregate Types

Dirt. The word alone can have many different meanings to different people.

In this instance, we’re talking about the dirt under our feet that we travel on daily in some form or fashion.

There’s just plain ol’ clean fill dirt. Then there’s Topsoil. Select Fill. Caliche. Black Texas Gumbo. Clay Dirt. Composted Dirt. You get the drift! (Which by the way, dirt can be used to create drifts!)

Clean fill dirt is dirt that has been excavated from a new/existing project that isn’t screened but is typically devoid of large rocks/clay material.

Topsoil is “ a surface soil usually including the organic layer in which plants/grass have most of their roots. This type of soil is most ideal for fostering new growth.

Select Fill dirt is “ a 60/40 mix of lean clay to sand. “ Select fill is a higher valued soil because it can be used in several different operations for soil enhancement. It’s primarily used to elevate a project/pad site to create a stable foundation. Mixing this soil with topsoil can create a richer environment for growth when using Select Fill as the foundational soil first then topping with Topsoil.

Caliche “ is a mineral deposit of gravel, sand and nitrates, found especially in dry/arid areas.”

Clay Dirt “ is a soil that is composed of very fine mineral particles and not much organic material.” The resulting soil is quite sticky since there is not much space between the mineral particles, and it does not drain well in general.

Composted Dirt is not technically considered dirt. It is instead referred to as a soil amendment/enhancer that is rich in microorganisms and nutrients. This type of “soil with any of the aforementioned other than Clay and Caliche can help foster a better environment for plant growth and soil stabilization.



Shovel stuck upright in freshly dug up dirt