Crushed Stone Supplier and Delivery

Aashto, Modified Stone and Rip Rap

various types of aggregates


AASHTO #1 aggregate stone type
  • This material has a 4 inch top size, sometimes called ballast.
  • Too bulky to be used as a surfacing material but it is great for subgrade stabilization.
  • Used for construction entrances, road base and ditch lining.
  • Clean material that does not compact
  • Visual inspection by customer required


2A aggregate stone type
  • PennDOT 2A has a 2 inch top size and many fines
  • Great compaction and used as a road base and under slabs
  • Primarily a clean material that will compact
  • Used where stability is a concern

2RC / 2A Modified

2RC aggregate stone type
  • Material has a 2 inch top size and is a mix of coarse stone and fine material
  • Fines in material will include dirt, silt, loam, or clay
  • Great compaction and is used under slabs, road base, and fill
  • Primarily a dirty material that will compact and does not drain

3A Modified

3A-MOD aggregate stone type
  • Blend of #3 and 2RC/2A MOD. 2 ½” topsize
  • Used as heavy-duty sub-base for roads and parking lots.
  • Great for areas with deep fill requirements where compaction is desired.

AASHTO #8 washed

AASHTO#8 Washed aggregate stone type
  • This material has a 1/2 inch top size.
  • Used in ready-mixed concrete and hot mix asphalt
  • Also used for driveways, walkways, drainage, and at times pipe bedding.
  • Clean material that does not compact well
  • Is used as an anti skid material in some situations.

AASHTO #10 washed

AASHTO#10 aggregate stone type
  • It has a 3/8 inch topsize and sizes down to a silt sized material.
  • Commonly used in concrete block, masonry products, and pipe bedding
  • This material is a crushed stone dust similar to the fines found in 2A.
  • Material has many fines, but will not compact and it does drain slowly

AASHTO #57 washed

AASHTO #57 Washed aggregate stone type
  • This material has a 1-1/2 inch topsize and is a clean material.
  • Used in ready-mixed concrete and hot mix asphalt
  • Also used for driveways, walkways, and drainage
  • Clean material that does not compact well

RIP RAP: R3 (3"-6")

R3 aggregate stone type
  • Large boulder-sized rock that is often seen lining rivers and streams.
  • Visual inspection by customer required.

RIP RAP: R4 (6"-12")

R4 aggregate stone type
  • Large boulder-sized rock that is often seen lining rivers and streams.
  • Visual inspection by customer required.

Other Available Rock


RIP RAP: R5 (9″-18″), R6 (12-24″), R7 (18″-30″), R8 (24″-42″)


  • Classified into six categories, R3 to R8, the material ranges in size from 6″ to 42″.
  • Due to its size and nature, this material will not compact.
  • Made to be machine placed in uniform layers.
  • Visual inspection by customer required for any orders of aggregate AASHTO #1 or larger.



Do you depend on aggregates for completing your construction projects? If you’re looking for a supplier of high-quality aggregate materials in central PA, you’ve come to the right place! As one of the top aggregates suppliers in the region, Union Quarries has the right aggregate products for your needs. By mining limestone, we can produce a wide assortment of aggregate types ranging from small to large sizes and in fine and coarse textures.

We Carry Various Types of Aggregates


You can find many types of aggregates — they’re the most commonly mined minerals in the world. Examples of the materials we produce and distribute include:


  • 2A stone: Also known as 2A crushed stone or 2A modified stone, this material is a mixture of crushed stone and coarse stone dust and derives its name from its 2-inch top size. Builders typically use 2A stone in projects where drainage and stability are primary concerns. Examples include use as a sub-base for roadways, walking paths and driveways.
  • AASHTO No. 57: AASHTO 57 crushed stone is a clean material that won’t compact and features a 1 1/2-inch top size. Typical applications include as backfill for retaining walls, as well as a sub-base for sheds and driveway crushed gravel or stone. Many ready-mix concrete and hot-mix asphalt products contain No. 57 aggregate as its primary ingredient.
  • 2RC stone: This select granular product consists of a mixture of fine material and coarse stone. This “dirty” aggregate will not compact or drain, making it suitable for projects where stability and compaction are concerns. Typical uses include fill or backfill material.

Where Can I Find 2A Stone Near Me?


Whether you’re looking for 2A stone, 2RC stone or No. 57 aggregate, Carlisle, PA-based Union Quarries has what you need. We deliver to companies within 30 miles of our facility (40 miles for aggregates), which encompasses Carlisle, Harrisburg and Mechanicsburg and the surrounding areas.


Union Quarries has provided reliable aggregate, stone, asphalt and concrete solutions since 1961. We serve contractors, project managers, estimators and anyone else who needs the best products for their paving and construction projects.

Delivery Services for Crushed Stone


Those in the construction business understand the importance of on-time material delivery for keeping your projects on schedule and allowing your workers to get things done. Having those materials there when you need them requires a reliable crushed stone supplier who’s ready to go above and beyond to get your products to your team. Union Quarries delivery services can help you stay on track.


Our team provides various crushed stone products for delivery to facilities and work sites throughout Central PA. Our goal is to make it easy to get the high-quality products you need when you need them. Allow us to take over the process of getting the right materials to your job site so you can focus on keeping other areas of the project moving.

Benefits of Using Stone Delivery Services


Crushed stone material delivery offers several benefits to construction businesses like yours. Partnering with Union Quarries to have stone and gravel delivered offers advantages like:


  • Punctual deliveries: We deliver products at a time that works best for you, helping you complete projects as scheduled.
  • Top-of-the-line products: Our products are highly rated and will deliver exceptional performance for your applications.
  • Extensive delivery options: Our team can provide crushed driveway stone delivery anywhere in our service area, including private residences.
  • Enhanced resource use: With our delivery service, you’re using our people, equipment and time to get stone to your work site, letting you direct your own resources toward more pressing matters.


Customers throughout Central PA use Union Quarries for stone and gravel delivery services they know they can trust.

Where Can Union Quarries Deliver Gravel?


The Union Quarries manufacturing plant is in Carlisle, PA, the heart of the state’s center region. Our team can deliver crushed stone products to any construction project within a 40-mile radius of our location. Cities in this region include:


  • Carlisle
  • Mechanicsburg
  • Dillsburg
  • Harrisburg
  • York


Customers throughout the counties of Dauphin, Perry, York, Adams and Cumberland rely on our team for gravel and other essential materials. When you need local stone delivery on demand, let Union Quarries help you get the products you need without delay.

Why Choose Union Quarries for Crushed Driveway Stone Delivery?


We have been manufacturing and delivering stone, asphalt and concrete solutions in our local area since 1961. Our experience here has given us a rich understanding of the community’s needs and a commitment to giving every client the superior service they deserve.


Our manufacturing plant follows best practices to ensure the safety of our workers and the production of high-quality materials. Additionally, we work hard to build and maintain long-lasting client relationships and do everything in our power to deliver the stone and other products you need right when you need them.

Our Commitment to Service Sets Us Apart


At Union Quarries, we always make the needs of our customers our top priority. We focus on building lasting relationships with vendors and customers. Our efficient staff is available to answer your questions and address your concerns and will do whatever it takes to make you a satisfied customer.

We Work Hard to Maintain a Safe Work Environment


The dangers of our industry create a variety of safety hazards for employees. At Union Quarries, we take work safety seriously. We’ve implemented the most stringent measures, including holding regular meetings to discuss the most pertinent safety topics. We also train our staff to identify and address workplace hazards.

Contact Us to Learn More About 2A Stone and Our Other Aggregate Product Offerings


If you’re in the Central PA area and are searching for an aggregates supplier that offers many types of aggregates that you can trust, get in touch with the experienced professionals at Union Quarries. Feel free to contact us for more information and a free quote. Learn more about our aggregate delivery in Central PA today.