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.
1 Overall, a gravel driveway made of this material costs around $0.50 to $3 per square foot. 2  According to Doityourself.com, base gravel ranges from $1 to $3 per square foot. 3  The second layer of aggregate costs around $3 to $4 per square foot.