Stabilize vs. undercut.
Soft subgrade? Compare treating it in place with lime or cement against digging it out and replacing it — cost range, schedule, and trucks off the road.
Please note
These numbers are budgeting estimates only, built from publicly available cost data — MoDOT weighted average unit bid prices, EIA diesel prices, and BLS PPI. They are not a bid, quote, or engineered estimate. For a project-specific number, request a bid.
Conceptual comparison built from public cost data (MoDOT average unit bid prices, EIA diesel, BLS PPI). Final design depends on the geotechnical report and a laboratory mix design. Not a bid or quote.
When stabilization fits
Clay and silty soils that react with lime or cement, large pad and paving areas, wet seasons, tight schedules, and sites where hauling is long or expensive. Treating in place keeps trucks off public roads and turns soft ground into a working platform in days.
When undercut fits
Small or isolated soft spots, organic or debris-laden soils that won't react with reagent, very deep unsuitable layers, or specs that require removal. The geotechnical report and lab mix design make the final call.
