Frequently Asked Questions

Dredging from mine sites using a cutterhead dredge is an effective method.  The cost can be as little as a few dollars a cubic yard or ton, but can increase up to $100 per cubic yard or ton depending on various factors. 

The cost of sand depends on the type of sand that you use and the distance of trucking for delivery.  Sand suitable for volleyball usually starts at $16 per ton but can range up to $75 per ton with certain specs and delivery included.  Either way be prepared to spend more than $1,000 for sand in a volleyball court.

A dump truck load of fill dirt is typically 15 to 18 tons.  This can be 10 to 15 cubic yards of dirt.  Remember to consider about 10% more if you are planning on compacting the fill dirt.  Also, be sure to use our calculator to find out how much dirt you need.

A couple of inches of mulch is ideal for ground cover but be careful not to place too much mulch around the base of a tree or shrub.  Do not cone the mulch around the base of a tree. 

Potting soil is usually sold by the cubic foot in a bag.  If you are looking to fill multiple containers or use a lot of potting soil over time, you may consider buying it in bulk.  Use a volume calculation to determine how many cubic feet you need and then multiply by 27 to determine how much is the equivalent in cubic yards.  If it is over 1 cubic yard, then River Sand may be able to supply you bulk potting soil and save money.

A standard size horse arena will need anywhere from 50 to 300 tons of sand.  The biggest determining factor is the dimensions, or size, of the arena and the depth of the footing.  Many styles of riding only need 2 to 4 inches of footing for their arena while some need more than 8 inches of depth.  You can use are calculator to input your dimensions and preferred depth to calculate the tons that you will need, or call us and we can help.

Generally speaking, you will need about 200 tons.  You can use our calculator to put in the dimensions of the court along with the depth you would like to achieve.  Remember to include any extra for the perimeter of the court. 

In general, a depth of 3 to 6 inches of soil is needed for roof top gardens, or green roofs.  Calculating the area of the garden and multiplying by the depth can give you a total volume (i.e. 10 feet x 3 feet x 6 inches divided by 12 = 15 cubic feet or 0.56 cubic yards)

The smallest tube can fit in a roll-off container using an area about 8 feet by 20 feet.  However, most tubes with use by a small dredge need to be 30’x50’ and 30’x100’ with a dredge commonly used.  Remember, that tubes can be made to any length and width needed.  The more area available allows for a larger bag to pump in to allowing for more sludge removal in less time. 

A general rule of thumb is to install 2 cubic feet for every square foot of tree crown expected at maturity.  The depth should be 24” minimum, but 36” is preferred.