United Rock Products

What United Rock Products does

United Rock Products supplies locally sourced aggregate and inert fill materials for heavy civil construction and infrastructure projects across Southern California. It functions as the raw materials division of Sully-Miller Companies, a vertically integrated group in which Blue Diamond Materials provides hot mix asphalt and Sully-Miller Contracting Co. executes project delivery; this structure gives United Rock a captive downstream demand channel and integrated quality control. The company serves contractors and public agencies building roads, highways, airports, seaports, rail and intermodal facilities, and specialty civil projects, with named customers including Ontario International Airport Authority, Los Angeles World Airports, Long Beach Airport, the City of Lancaster, and Totum Consulting.

The underlying operation combines quarrying/processing of aggregate, integration with downstream asphalt supply, and shared project execution with Sully-Miller Contracting, supported by global resources from Colas Group and Bouygues S.A. Pricing is quote-based and project-specific, negotiated via Sully-Miller's "Request a Quote" channel, and the business is B2B enterprise field sales driven by established contractor and public-agency relationships rather than transactional channels. The company has operated continuously since 1923, holds an ENR 2021 Top 50 Domestic Heavy Contractors ranking at the parent level, and markets itself around reputation, safety (outstanding EMR), and an accredited in-house QC lab.

Revenue is generated by selling aggregate and inert fill, primarily to support Sully-Miller Contracting's project pipeline and other Southern California construction contractors; there are no public financials disclosed. The business model is essentially a vertically integrated materials supply within a regional heavy civil franchise, with no software, subscription, or technology-licensing revenue streams. Geographic scope is deliberately narrow — Southern California only — which constrains absolute growth but underpins cost efficiency from local sourcing and short haul distances.

Name

United Rock Products

Legal name

United Rock Products

Website

https://unitedrock.com

Company type

Private

Founded year

1923

Operating status

Operating

Short description

United Rock Products supplies locally sourced aggregate and inert fill materials for heavy civil construction in Southern California, serving as the raw materials arm of the vertically integrated Sully-Miller Companies alongside Blue Diamond Materials (asphalt) and Sully-Miller Contracting (execution).

Ownership category

akta.pro rank

Product category

Construction Aggregates

NAICS

Construction Sand and Gravel Mining (212321), Mining (except Oil and Gas) (212), Nonmetallic Mineral Mining and Quarrying (2123)

SIC

Mining & Quarrying Of Nonmetallic Minerals (No Fuels) (1400)

akta.pro primary industry

Construction Aggregates Mining & Processing (Sand, Gravel, Crushed Stone) (IMADAAAI)

akta.pro secondary industries

Sand & Gravel Extraction & Processing (IMAKAHAB), Aggregates & Dimension Stone Trading (Sand & Gravel, Crushed Stone, Limestone, Granite, Marble) (IMAKAJAG)

Keywords

• Aggregate materials supply
• Inert fill materials
• Construction aggregates
• Heavy civil materials
• Infrastructure materials

Headquarters

HQ city

Brea

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Infrastructure

Revenue model

1. Aggregate and Inert Fill Materials Supply: United Rock Products generates revenue through the extraction, processing, and sale of aggregate materials and inert fill to construction contractors. As part of the vertically integrated Sully-Miller Companies, materials are supplied to support Sully-Miller Contracting Co.'s heavy civil construction projects across Southern California.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

United Rock Products extracts, processes, and supplies aggregate materials and inert fill used as base and structural materials for heavy civil construction projects in Southern California. Operating as the raw materials division of the vertically integrated Sully-Miller Companies, it supplies aggregate to Sully-Miller Contracting Co. projects and other contractors across roads, highways, airports, seaports, rail, and specialty construction. The company also provides reclamation services tied to its materials operations.

Product overview

United Rock Products is a subsidiary within the Sully-Miller Companies (alongside Sully-Miller Contracting Co. and Blue Diamond Materials). The company operates as a vertically integrated materials supplier, providing locally sourced aggregate and inert fill materials. These products support the broader infrastructure construction capabilities of the parent company, with Blue Diamond Materials providing hot mix asphalt and Sully-Miller Contracting executing construction projects. United Rock Products functions as the raw materials division of this construction conglomerate.

Differentiator

Problem solved

Functional benefit

Products and services

• Aggregate Materials Locally sourced aggregate materials supplied for heavy civil construction projects in Southern California, used as base and structural materials for roads, highways, airports, seaports, rail and intermodal facilities, and specialty construction. Sold to construction contractors and infrastructure owners.
• Inert Fill Materials Inert fill materials supplied for heavy civil construction and infrastructure projects in Southern California, used in grading, site preparation, and reclamation activities for roads, airports, and other infrastructure builds. Targets construction contractors and infrastructure owners.
• Reclamation Services Reclamation services tied to aggregate and inert fill operations, supporting heavy civil construction and infrastructure projects in Southern California. Offered to construction contractors executing site preparation and earthworks.

Quantifiable outcome

• Outstanding EMR (Experience Modification Rate) indicating strong safety performance

Named customers5 records

Segments5 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Two partnerships are on record, tiered core.

• Blue Diamond MaterialscoreStrategic or Co-development PartnerSully-Miller Company subsidiary providing hot mix asphalt. Together with United Rock Products (aggregate) and Sully-Miller Contracting (project execution), forms a vertically integrated construction materials and services operation.
• Sully-Miller Contracting Co.coreStrategic or Co-development PartnerPrimary project execution arm of Sully-Miller Companies, utilizing aggregate from United Rock Products and asphalt from Blue Diamond Materials for heavy civil construction projects across Southern California.

Scale indicators4 records

Recent moves4 records

Expansion highlights2 records

Direct peers

• Summit Materials: Vertically integrated construction materials company producing aggregates, cement, and ready-mix concrete across the U.S. Direct comparable business model in aggregate mining and supply for infrastructure markets.
• Martin Marietta Materials: Major U.S. supplier of aggregates (crushed stone, sand, gravel) and asphalt products serving highways, airports, and infrastructure. Direct comparable business model — quarry-to-project aggregate supply — at a much larger national scale.
• CalPortland Company: Major West Coast producer of cement, ready-mix concrete, and aggregates with extensive California operations. A direct regional competitor in aggregate supply for infrastructure and construction projects.
• Vulcan Materials Company: The largest U.S. producer of construction aggregates (crushed stone, sand, and gravel) and a major asphalt mix producer. Directly comparable as a vertically integrated aggregate supplier serving infrastructure and construction end markets; United Rock operates at a regional scale while Vulcan is national.

Regional players

• Holliday Rock Co., Inc. Southern California-based aggregate, asphalt, and ready-mix concrete supplier serving the Inland Empire and greater SoCal region. Closest geographic competitor to United Rock within Southern California.
• Robertson's Ready Mix: Southern California concrete and aggregate supplier serving Los Angeles and Orange County. Comparable regional aggregate business; owned by Mitsubishi Cement/Amigo Brands and overlapping with United Rock in local markets.
• Syar Industries: Northern California-based aggregate and asphalt producer serving Bay Area and Northern California markets. Comparable product offering but geographically distinct (Northern California vs. United Rock's Southern California focus).

Broad incumbents

• Granite Construction Incorporated: Heavy civil construction contractor and aggregate producer with significant California operations. Comparable as both a competing heavy civil contractor (vs. Sully-Miller Contracting) and an aggregate supplier (vs. United Rock).
• Cemex: Global building materials leader producing cement, ready-mix concrete, and aggregates. Operates U.S. aggregate and ready-mix businesses that compete in Southern California infrastructure markets. Broader incumbent with overlapping aggregates product line.
• Heidelberg Materials North America (Lehigh Hanson): Major North American aggregate, cement, and ready-mix producer with California operations. Broad incumbent offering overlapping aggregates products across infrastructure, commercial, and residential construction.

Market position

Strengths1 record

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/UnitedRockProducts
• LinkedInlinkedin.com/company/sully-miller-contracting
• Instagraminstagram.com/sullymiller

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about United Rock Products