Why the base matters in Imperial
Ridges near the Mississippi carry thick loess, and slopes back from the river hold cherty red clay over limestone. Clay holds water, loess erodes when runoff concentrates, and freeze-thaw winters exploit either one. We set the grade to move water off the pavement, remove soft soil and compact rock in layers.
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 Imperial estimate is sized to the soil, the traffic and the drainage on your property.