Photo: Rio Tinto, Borax Mine, Boron, CA
Photo credit: Marcin Wichary -license (cropped)


CalPortland (CPC ) is the oldest continually producing Portland cement company west of the Rocky Mountains. It was founded in 1891 with the opening of the Colton, California Plant. Today, Colton is one of three plants owned by CPC. The other two are at Mojave, California and Rillito, Arizona.

From its early years, CPC has remained a leader in the industry through its commitment to quality unsurpassed, technical superiority, and customer service. From the largest producer of sand, gravel and quarry rock in the Pacific Northwest supplying the construction industry in Washington, and Oregon to as far away as British Columbia and Alaska.


Golden Queen is developing the Soledad Mountain Project, a fully-permitted, open pit, heap leach gold and silver project located just outside the town of Mojave in Kern County. The Project will use conventional open pit mining methods and the cyanide heap leach and Merrill-Crowe processes to recover gold and silver from crushed, agglomerated ore.

With just shy of 100 employees in place and construction nearing completion, Golden Queen Mining Company is prepared for production of gold and silver in February 2016.

The milestone is a significant one as the historic mining project, shuttered for decades, is positioned to be a dynamic economic stimulus in the Antelope Valley for many years to come.

Development of the mine is a joint venture between Golden Queen Mining Company, Ltd., and Gauss LLC and came on the heels of the state issuing final permitting approval in 2012.

This historic mine, which first operated in the 1930’s, was resurrected when rising gold prices made the project feasible. The Company looks forward to a long tenure in Mojave and bringing economic vitality to the entire region.

GRANITE CONSTRUCTION - Littlerock, Palmdale, Arvin & Inyokern

Since 1922 Granite has been producing aggregate materials used in local infrastructure; including notable projects such as the California Aqueduct, the first roads in Yosemite, and Edwards AFB’s runways. Granite’s crushed rock and hot mix asphalt products can be found everywhere in our local community from the roads and airfields we use for transportation to the foundations, water management and flood control systems which protect our quality of life. Highways, transit systems, railroads, airports, water distribution systems, energy supplies, and seaports built by Granite drive our economy and support our quality of life.

Granite is also a leader in sustainable construction, integrating recycled materials in the construction materials (such as recycled base or recycled asphalt product) into their products. Granite Construction is recognized as one of the largest diversified construction companies and is a full-service general contractor, construction management firm, and construction materials producer.


Rio Tinto Minerals (RTM) operates California’s largest open pit mine in Boron, California. The mine contains one of the richest borate deposits on the planet and supplies over 30 percent of the world’s demand for refined borates. While boron is present everywhere in the environment, substantial deposits of borates are relatively rare. These minerals are essential to life and modern living.
RTM roots stretch back to 1872 when company founders began mining borates in Nevada.

These pioneers discovered borates in Death Valley in 1881 and used teams of twenty mules and giant wagons to haul them 165 miles to the nearest railroad in Mojave, California.

Boron began as an underground mine in 1927 and was transformed into an open pit mine in 1957.

Borates are minerals that contain boron, the fifth element on the Periodic Table. Borates are basically salts and are essential to life – plants need borates to grow and they are part of a healthy diet.

Borates can also be found in a wide variety of products including:
• Fiberglass, wood preservatives and ceramics used to make homes safer and more energy efficient
• Heat-resistant glass used in flat-screen televisions and laptop computers
• Textile fiberglass used in sporting equipment and wind energy systems
• Fertilizers that help farmers increase crop quality and yield
Boron Operations is recognized as one of the safest mining operations in the United States.
• The global team is made up of around 1000 employees, with over 60% employed at our Boron Operations
• The mine measures 2 miles (3.2 kilometers) long, 1.75 miles (2.8 kilometers) wide, and 755 feet (230 meters) deep
• The operation mines about three million tons of ore per year to produce about one million tons of refined products
• Processing plants produce borax pentahydrate, borax decahydrate, and boric acid from tincal and kernite ore feedstocks; fusing plants also produce anhydrous borate products
• Products are shipped to customers in more than 100 countries via truck, rail, barge and ocean-going vessels
• Each haul truck costs more than $1 million and can carry 240 tons of material

RTM is recognized as a world leader in borate supply and science. Most of the operational processes that set the standard for borate production were developed or first adopted at Boron Operations.

Boron Operations has been partnering with local communities for nearly 90 years and contributes more than $150 million to the local economy annually.

With a strong culture of safety, the 20 Mule Team Borax mine continues to be recognized as one of the safest mining operations in the United States. The mine measures 2 miles long, 1.75 miles wide and 900 feet deep. We excavate about 3 million tons of ore per year, and produce 1 million tons of refined products – shipped to customers via truck, rail, barge and other ocean-going vessels.


Searles Valley Minerals manages extensive operations in California’s Searles Valley. Power and production facilities cover more than 339 acres at the Argus, Trona and Westend plants in California. Searles Valley Minerals processes brine solutions from Searles Lake to produce boric acid, sodium carbonate, sodium sulfate, several specialty forms of borax, and salt. Unlike other mining techniques such as open pit mining, our three facilities in Searles Valley use a unique, ecologically friendly process that starts with solution mining.

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