AASHTO #3 Crushed Stone

#3 Aggregate at Union Quarries


AASHTO #3 is a large grade of crushed stone. This variety shares its composition with AASHTO #1, but it has a slightly smaller top size. This is a clean material that will not compact.

What Is #3 Crushed Stone?


Crushed stone is a construction aggregate. It looks similar to gravel, but while gravel is eroded naturally, crushed stone is mined and crushed into specific sizes for a variety of practical uses.


Crushed stone can be sustainably produced from nearly any variety of hard stone. The most common types of rock used are limestone, argillite, washed gravel, granite,  traprock and quartzite. At Union Quarries, we use Pennsylvania’s abundant limestone to produce AASHTO #3 and other grades of crushed stone.


Different grades of crushed stone are used in a wide range of construction projects, from base material for pavement to decorative use in areas for walking and driving.


The grades of crushed stone are categorized by the size of the pieces after the rock has gone through the crushing process. AASHTO #3 is on the larger end of the spectrum of crushed stone and is just slightly smaller than AASHTO #1.

AASHTO #3 Stone Size


AASHTO #3 has a 2.5 to 3-inch top size. While AASHTO #3 aggregate is still relatively bulky, it is somewhat easier to handle than AASHTO #1.

Uses for AASHTO #3 Aggregate


Here are some common commercial and residential applications for material of this grade:


  • Drainage purposes.
  • A base for a driveway with screening.
  • Lining for a stormwater diversion pit.
  • Haul surfaces.
  • Decorative edging for a pond or walking path.
  • Tire scrubbers.
  • A road base.


If you’re planning on taking on any of these construction projects, AASHTO #3 might be the right material for you. Our product calculator is available to help you determine how much material your application will require. Once you have an idea, you can request a free quote from Union Quarries.

Find the Right Crushed Stone at Union Quarries


Having access to a reliable producer of stone, concrete and blacktop is essential to a successful landscaping or construction job. Union Quarries proudly provides service from Carlisle to the entire Central PA region. We make safety a priority and offer specialized services that go beyond the capabilities of any other local quarry.


Union Quarries has been Central PA’s reliable provider of crushed stone for over half a century. We offer AASHTO #3 as part of a wide range of sizes of crushed stone to fit the needs of any commercial or residential construction project you have in mind.

Contact Union Quarries Today to Begin Your Next Construction or Landscaping Project


If you’re unsure about which grade of crushed stone is the best choice for your next project, reach out to Union Quarries for expert assistance. Our helpful staff is prepared to point you in the right direction whether you’re a contractor, developer, homeowner or builder. Give us a call at (717) 249-5012 or get in contact with us online so one of our representatives can get you set up with the right stone to complete any residential or commercial project.