DISPATCH 505-832-4739 CORPORATE OFFICE 505-832-6800
Q: How much rock do I need?

A:  Quantity of rock depends of a couple of different factors.  Material density plays
a big role in factoring out how many tons of rock you will need. Different types of
rock weigh-in differently and therefore can change how much rock you will
ultimately need.  How deep you decide to lay your rock will also determine how
much rock you will need. Here is a basic formula for calculating how many tons of
rock you will need to cover an area with MOST typical landscape rocks, usually ¾”
or smaller, at an average depth of 2”.  Take your area, commonly (L) length x (W)
width, and divide it by 125.  This will give you a pretty good estimate as to how
many tons you will need.  Pumice rock and other lightweight materials, as well as
base courses do not apply to this formula. For larger sized aggregates and
alternative depths you should contact one of our professionals.

Q: Can I get more than one type of rock delivered on the same truck?

A:No, each type of material requires a separate delivery and therefore an
additional delivery charge. There is no way of separating different materials.
Sometimes we layer mix materials at customer request in which case the customer
is required to pre-pay the order in advance by cash or credit.

Q:  How do I know I received the amount of rock that I ordered?

A;  All materials are weighed on State of New Mexico certified scales with all
weights printed on delivery tickets.  Shortages or excesses of material usually
occur due to customers/contractors inaccurate measurements or when the
material is laid over an uneven grade. Customers should always contact their rock
supplier to double check measurements and quantities.

Q:  How do I pay for my order?

A:  We accept Visa or MasterCard, as well as cash or check. All orders must be
pre-paid unless special arrangements have been made.  You can pay at our main
office or talk to a Duke City representative and pay over the phone by credit card.

Q: Why does the rock I received have dirt in it?

A:  It is not dirt. Certain types of rock can contain fines created from the crushing
process. It is not possible to eliminate all crusher fines during the screening

Q:  What is the difference between round and crushed rock?

A: Round rock is natural smooth surfaced rock that comes from the earth and is
screened into different sizes.  Crushed rock is often blasted from a rock face into
smaller chunks and is then run through a rock crusher and made into different
sizes.  Larger round rock can also be crushed down and made into smaller sizes of
crushed rock. As far as application there are some key differences.  Round rock is
commonly used as a leach rock for drainage, decoration, cobble stone
construction, and in some instances it can be used for erosion control in larger
sizes.  Round rock works well as a drainage rock because it doesn’t compact and
has many voids that allow for filtration.  Crushed rock is commonly used for
decoration, sub-grade, road base, engineered backfill and rip-rap/erosion control.  
Crushed rock is commonly used because it compacts well, greatly reducing if not
eliminating voids.

Q:  What kind of rock do I use for a driveway?

A: For driveways we always recommend using some type of crushed rock because
it compacts where as round rock does not. When building a driveway you’ll need
something that is going to compact well and provide a good base.  Any type of 1
½”, ¾”, or 3/8” crushed rock and crusher fines will work well as long as you use a
durable rock.  Base courses also come highly recommended. Base courses are
typically very heavy and dense, and the aggregate composition tends to bind very
well leaving no voids in a compacted area.