What's under a Gillespie driveway
Bear Creek carries this ground southeast toward the Mississippi, and the lakes northwest of the city sit on the Dry Fork of Macoupin Creek. Water that cannot get off a surface soaks into the clay-heavy soils common in this region, then freezes and lifts the asphalt. Grade and a compacted base handle most of that.
Bids are only comparable when they spell out the same things: base depth, compacted thickness, how edges are finished, and where water is meant to go. Ask for those before you pick a number.
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 Gillespie estimate is sized to the soil, the traffic and the drainage on your property.