Stirling Castle is situated on top of atop the Castle Hill in Stirling. It is one of the largest and most significant castles in Scotland. The site...
Landscape Gravel. 1  The average cost for crushed rock gravel or lava rock is $640 for 32 square feet of gravel. 2  The minimum cost that property owners pay for crushed rock gravel or lava rock is $140, which covers 7 square feet of gravel.
Cost. To get the cost of gravel, multiply the number of cubic feet you need by the cost per cubic foot. In the example, we need 150 cubic feet; if it costs $10 per cubic foot, then the gravel costs $1,500. If your gravel supplier sells gravel in cubic yards, divide the number of cubic feet by 27 to get the number of cubic yards, then multiply by the cost per cubic yard.