About Blue Diamond

Our Performance

With six plants at five different locations, all awarded the National Asphalt Pavement Association’s Diamond Achievement and Diamond Quality status, we consistently meet our customers’ needs.

Blue Diamond Materials is a leader among hot mix asphalt suppliers providing hot mix asphalt materials for projects within the Los Angeles, Orange, Ventura, San Bernardino and Riverside County areas with emulsion and seal coat available at select plants. Whenever possible, Blue Diamond Materials acts environmentally responsible by using Recycled Asphalt Pavement (RAP).

Blue Diamond Materials is consistently recognized for:

High Quality Products
Customer Service
Convenient Locations
Competitive Pricing

With six plants at five different locations, all awarded the National Asphalt Pavement Association’s Diamond Achievement and Diamond Quality status, we consistently meet our customers’ needs.

Organizational Excellence

Our vertically integrated company streamlines any project to ensure cost-efficiency, quality and service on the most complex projects.

Blue Diamond Materials and United Rock are affiliated under Sully-Miller Contracting. And as part of the Colas group, Sully-Miller has access to the global resources needed to build infrastructure ranging from roads and heavy highways to airports and commercial private works, maintenance contracts and B permits.

Sully-Miller Contracting

Mobilizing economies through heavy civil contracting services

United Rock Products

Locally sourced aggregate and inert fill materials


Access to a wealth of resources & innovative technology

Our Motto is "Safety First"

Blue Diamond Materials understands the critical impact safety has on our industry.

The safety and health of our employees, the public, and the environment is on the forefront of everything we do. Safety is at the top of the list when it comes to Blue Diamond’s core business values.

Our employee-run safety department administers and oversees Blue Diamond’s Incident Prevention Program by empowering every employee to take action. The team ensures our asphalt plants remain in compliance with company and agency standards on a daily basis.

With our goal of continuous improvement, our dedicated employees, and our drive for excellence, we aim to reduce our incident rate every year.

Our ultimate goal is always ZERO incidents.

The People of Blue Diamond Materials

What does a company that has a workforce with an average tenure of 20+ years bring to the table? The dedication, commitment, and experience to do the job right, with the right answers and the right approach. Our people provide a value-added benefit to each and every one of our customers, which makes us the supplier of choice for hot mix asphalt.

Blue Diamond Materials has teams of experts that focus on customer service, dispatch, quality, manufacturing, recycling, and the environment.

Quality: A Top Priority At Blue Diamond Materials

We also have an extensive quality control department and material design lab at our Irwindale location that is accredited by AASHTO and Caltrans certified. The link to our AASHTO accreditation status and the scope of testing for our Irwindale lab can be found here.

At Blue Diamond Materials, we are extremely conscious of our impact on the environment.

Asphalt Recycling

We recycle thousands of tons of asphalt pavement each year, saving valuable materials from landfills, and conserving virgin aggregates. This practice reuses the petroleum fraction of our product by reusing the “glue” as new binder material from the original product. This direct reuse reduces the demand for oil imports and produces a product equally to, and in some ways superior to 100% virgin asphalt pavement.

Power Savings

We’ve also pioneered the uses of variable frequency drive motors on asphalt plants, which reduces our electrical demand and consumption.

Eco-Friendly Production

Blue Diamond Materials is leading the efforts to introduce EcoMat® Warm Mix Asphalt technology to the Los Angeles Basin and surrounding areas. This process reduces the energy needed to heat asphalt mixes, reduces emissions at both the plant and the job-site, and ultimately increases the performance of pavement.


Blue Diamond Materials is actively involved in several construction industry associations. Internally, we have many employees enthusiastically participating in various committees for the following associations:

Get Quality Asphalt Mixtures