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Base Stone - Ordovician Dolomitic Limestone

BASE STONE is an aggregate material comprised of fractured pieces of Ordovician Dolomitic limestone that is blended with a determined amount of limestone fines. Because the material is a combination of larger pieces and fines, it compacts very well. It helps to create a stable base for applications when fabricating foundations, road sub-base, railroad sub-ballast, underlayment for stabilization, and the construction and maintenance of rural roadways.

Base Stone

BASE STONE is also known as road rock, road stone, base stone,  class A road stone, class A road rock, shoulder stone, surfacing stone, modified subbase, and granular subbase. Pattison produces BASE STONE in our state-of-the-art, jaw/cone crushing plant.  Our crushing plant features compression crushing technology that limits fines generation and increase fractured faces.

Base Stone Quality

We understand that source quality makes a significant difference in the longevity of aggregates. Our facility in Clayton, Iowa features 9 ledges that include ordovician dolomitic limestone, limestone and sandstone. Pattison BASE STONE has been used in several projects conducted by Iowa State University. It has been designated as “high strength” stone and has demonstrated a longevity that exceeds most other quarry Road Rock.

Pattison Base Stone Value

Qualitative testing has established that Pattison’s high strength BASE STONE saves substantial time and materials for end users. With our direct to rail transfer system, Road Rock products move quickly from production to rail cars with minimal handling. This reduces product degradation and lowers load out costs. Here’s what Wikipedia has to say

More about Ordovician Dolomitic Limestone

When it comes to rock, age really matters.  Ordovician Dolomitic Limestone is some of the highest quality, hardest and most durable anywhere in Iowa. Ordovocian formations are only found in the northeast portion of Iowa. Pattison’s Clayton, IA quarry site is right in the middle of it.

Road Rock Certifications

CertificationsSizesTech SizeMaterial Type
Iowa DOT Class A Road Rock1"1" minusLimestone & Dolomitic Limestone
Missouri DOT1"
1" minus
3/4" minus
Limestone & Dolomitic Limestone
Minnesota DOT1 ½ “ 1 ½” minusLimestone & Dolomitic Limestone
3/4"3/4" MinusLimestone & Dolomitic Limestone

Road Rock Properties

Abrasion27% to 42%
"C" Freeze1 to 4
Del. materials0.0% to .8%
P.I. LimitsNP
Disclosure: The information presented above is to the best of our knowledge accurate based on testing by certified independent laboratories. Any recommendations or suggestions are made without guarantee since conditions and/or material handling are out of our control. Pattison warrants that purchased product will meet the specifications set forth by the buyer.

State of the art Aggregate Plant

Pattison’s newly installed Cone Crusher and production plant is state-of-the-art, producing some of the highest quality Ordovician Dolomitic Limestone BASE STONE

Material is separated into various required sizes without inducing fractures, while yielding a refined individual rack shape that is the most desirable for tight compaction and stability. Pattison’s new aggregate plant produces BASE STONE of exceptional quality.

Pattison Roadrock Plant

Logistics second to none

Pattison recently completed its Rail Spur project, extending multiple rail lines directly into our new state-of-the-art aggregate production plant!.

Pattison’s advanced direct to rail loadout system coupled with the Pattison rail spur allows aggregate products to be loaded directly from the production plant on to enclosed rail ore cars for delivery. Eliminating excess handling saves costs, and insures a higher quality product.

Pattison Direct to rail load out

Pattison High Quality Aggregates and Proppants

Pattison produces high quality ordovician dolomitic limestone Aggregates and silica proppants.  Our Clayton IA, quarry contains multiple limestone ledges yielding material with a variety of properties that meet various requirements.  Our products are certified for use by multiple state Departments of Transportation, and the FAA.

Revetment Stone

Asphalt Stone

Ballast Stone

Concrete Stone

Clean Stone

Fine Aggregate



Specialty Products

Contact our Aggregate Sales Team for more information!

Contact our Aggregate Team Now!

Our quarry is located in Clayton, IA. We are one of the only sources of Aggregates and Proppants that can load directly to Rail, Truck or Barge from the same facility! Our logistic & delivery systems out pace our competitors. We’d love to hear from you!

Contact information

Aggregate Team

:  (563) 964-0106

: AggInfo@pattisonsand.com

Main Office

701 1st Street
Clayton, IA 52049

: (563) 964-2860

: info@pattisonsand.com

Operations Office

24312 Mississippi Rd., Clayton, IA 52049

Hours of operation

Office Open Monday – Friday: 8am to 4pm
Operating Hours – 24/7