What's under a Overland driveway
Clay-heavy soils are common across St. Louis County, holding water, swelling when wet and shrinking as they dry. Mature trees in the older neighborhoods keep ground damp longer and push roots under drives. Both problems get handled before paving: soft material out, roots dealt with, rock compacted in layers and a grade that clears water before winter can freeze it in place.
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 Overland estimate is sized to the soil, the traffic and the drainage on your property.