Gravel prices average $10 to $50 per ton, $15 to $75 per cubic yard, $1 to $3 per square foot, or $1,350 per truck load depending on the rock type and travel distance. Gravel spreading costs $12 per yard or$46 per hour. 1. A 4'×20' gravel walkway costs $250installed. 2. A 10'×20' gravel patio or landscaping costs $450i…