What we take off
| Scope | Units |
|---|---|
| Clearing, grubbing, demolition | Acres, SF, each |
| Topsoil strip and respread | CY |
| Mass cut and fill | CY (bank, loose and compacted) |
| Building excavation and backfill | CY |
| Subgrade stabilization | SY with binder rate |
| Storm sewer, sanitary sewer, water | LF by size and depth, structures each |
| Paving | SY or SF by section, curb and gutter LF |
| Erosion and sediment control | LF silt fence, each inlet protection, acres seeding |
Kansas soil conditions and earthwork cost
Expansive clay in eastern Kansas
Much of the Kansas City metro, Lawrence and Topeka sits on high-plasticity clays. Geotechnical reports often require over-excavation under slabs, select low-volume-change fill, moisture conditioning or lime treatment. These items can rival the cost of mass grading. Our expansive clay guide explains the options.
Limestone and shale
Shallow limestone and shale layers are common in parts of eastern Kansas, especially the Flint Hills and around the metro. Utility trenches and deep basements can hit rock that needs ripping, hoe-ramming or blasting. We price rock based on borings or carry a unit-price allowance.
River valleys and groundwater
Along the Arkansas, Kansas and Smoky Hill rivers, sandy alluvial soils and shallow groundwater can require dewatering, trench shoring and stable backfill.
Western Kansas
In southwest Kansas, sandy and silty soils are easier to excavate, but dust control, wind erosion and long haul distances for aggregate are key cost drivers.
Stormwater and permitting
Projects disturbing one acre or more generally need coverage under the Kansas Department of Health and Environment construction stormwater general permit, with a stormwater pollution prevention plan, inspections and erosion controls. Many cities also require detention, which adds basins, outlet structures and grading.
Related trades and services
Concrete for curbs and paving, plumbing for building connections, and public works estimating for city and KDOT bids. See Olathe and Garden City for two very different site profiles.
Frequently asked questions
How do you calculate cut and fill?
We compare existing and proposed surfaces from the grading plan or a digital terrain model, calculate cut and fill volumes by area, then apply swell and shrink factors to estimate truck loads, import or export and compaction effort.
What is lime stabilization and why is it common in Kansas?
Lime or fly-ash stabilization mixes a binder into clay subgrade to reduce plasticity and improve strength. It is common under pavements and building pads in eastern Kansas, where high-plasticity clays are widespread.
Do you estimate KDOT and municipal road work?
Yes. We organize quantities by the owner's bid items for KDOT and city street, utility and drainage projects.