Built for Winchester's ground
Loess uplands over clay are the norm across St. Louis County, and the county soil survey calls for adequate base material plus side ditches and culverts on local roads because of low strength and frost action. A West County winter cycles through freezes for months. We grade, compact, then pave.
A cheap bid usually gets cheap somewhere you cannot see. Ask what depth of stone goes down, how thick the asphalt is after rolling, and who fixes it if water still stands.
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 Winchester estimate is sized to the soil, the traffic and the drainage on your property.