Road base calculator for West Virginia

A lane 100-foot long and 10 feet wide with 6 inches of compacted road base calls for about 31 tons. Material adds up quickly on a lane, and free delivery matters when hauling 30 tons can normally rival the stone cost. Road base is a compactable mix of graded crushed rock and fines that weighs about 3,000 lb per cubic yard, creating a dense foundation for equipment yards, roads and driveways. Where the specification permits it, use this calculation for recycled crushed concrete base too.

Lane calculations

1. Take lane length along its centerline, then use the average width. For pads, multiply the straightforward length by width.
2. Use a compacted depth of 4 inches for light residential areas, 6 for everyday vehicles and delivery trucks, and 8-12 on soft subgrade or beneath equipment.
3. For yards, divide cubic feet by 27; multiply by 1.5 for tons; keep +10% for compaction.

Coverage and lane quantities

Build a lane for the second winter

• Remove organic material before placing stone. If base goes over topsoil, mud can work upward through the stone regardless of how much is installed.
• Lay woven geotextile first where the ground is soft or wet, then place the stone. It is an economical way to reinforce a lane.
• Install in lifts no deeper than 4 inches, rolling each one before adding another.
• Build in a 2-3% crown from the center so rain runs to each side rather than into the base.
• For a neat, low-dust driving layer, use #57 or driveway gravel on top.
• Handling 20-plus tons by hand can take a week. A tractor with a box blade or a skid steer can spread it in an afternoon, so account for equipment costs.

Worked example: a 100-foot farm lane

For a one hundred by ten foot stretch at 6 inches, 1,000 x 0.5 gives 500 cubic feet, or 18.5 cubic yards. Figure about 28 tons, or 30-31 after the allowance. It comes in two tandem loads. On a hollow driveway with a grade, set up two drop points along the stretch instead of leaving one pile at the entrance, so there is less material to move uphill.

Pads for RVs, containers and equipment

Use the same approach for pads, but select depth based on axle weight rather than the calendar. A 12 x 40 RV pad at 6 inches compacted takes about 12 tons. A 20 x 40 equipment yard at 8 inches takes 27. Shipping containers put weight on four corners, so use a full 8 inches plus fabric for container pads, even over decent ground, to help prevent corner marks by spring.

Crushed concrete road base

Recycled concrete base can compact and support loads similarly to virgin road base, and it may cost less. Review county requirements first, since some specifications call for virgin aggregate. For private lanes and pads, it can be a practical option. Use the same math: 1.5 tons per yard, the same lifts, and the same crown.

Road base by ton and lane

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