What's under a St. Peter driveway
Flat, slow-draining ground is the rule across this part of south-central Illinois. Clay-heavy soils common in the region hold water rather than passing it, and freeze-thaw winters lift anything built on a saturated base. We start with grade, cut out soft soil, and compact rock in lifts so the surface has something solid under it.
The part of the job you can see is the last two inches. Ask what is underneath, how it will be compacted, and which way the finished surface drains.
Compacted asphaltTypically 2 to 3 in. for a car drive
Stone baseTypically 4 to 8 in., compacted
Drive on itUsually 2 to 3 days, longer in heat
First sealcoatTypically 6 to 12 months after paving
Typical ranges. Your St. Peter estimate is sized to the soil, the traffic and the drainage on your property.