Clark, NV

EP Minerals Plant
640 Clark Station Road
Sparks, NV 89434
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In 1945, EP Minerals acquired the diatomaceous earth deposits 20 miles east of Reno, Nevada in what is known today as Clark, Nevada. Clark mines and manufactures diatomaceous earth (DE). Today, the Clark plant produces soil amendments, absorbents and carriers, as well as natural filter aids and functional additives. A flash dryer process is utilized in producing natural DE powders in support of the functional additive and natural insecticide/animal feed markets. The plant has one rotary kiln, two flash dry lines for natural DE powders and a DE surface treatment line. 

The Clark facility has an annual capacity of approximately 70,000 tons and utilizes DE ore from its surface mining, natural gas and electricity. U.S. Silica acquired the Clark facility when EP Minerals joined our company in 2018.


The Food Bank of Northern Nevada is located just up the road from Clark, providing many community service opportunities to our employees. Located right outside Reno, NV, Clark’s other neighbors include wild horses, Nevada bighorn sheep and a Tesla manufacturing facility. 

Delivery & Logistics

By Rail

The Clark facility is serviced via the Union Pacific Railroad.

By Truck

The Clark facility is located adjacent to the Truckee River, immediately accessible by Interstate 80.


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