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Pacific, MO


U.S. Silica's Pacific plant mines 98.8% whole grain silica sand from the St. Peter's Formation. The physical properties of the Pacific products make it effective in flat glass, glass containers, chemical, foundry, and the oil and gas industries.


Mining operations have been conducted on the Pacific site since the early 1900s. Some of the initial material mined at this site was used to build the famous Route 66, which fronts the plant.

In 1924, Pioneer Silica Products purchased a 205-acre tract of land and began mining underground. The underground rooms from this mine remain intact today and are used as storage and access to the present open pit mines.

The original 205-acre tract was conveyed to Pennsylvania Glass Sand Corporation in 1964. In 1987, Pennsylvania Glass Sand Corporation merged with Ottawa Silica Company to form the present day U.S. Silica.


Pacific employees are encouraged to volunteer their time and talents in community activities, trade associations and business forums to facilitate a relationship of stewardship within the communities they call home.

Customer Service Contact

For questions concerning the status of your order, please contact your Customer Service Contact at:

Oil & Gas

Industrial Specialty Products


819 East Osage

Pacific,  MO  63069

Phone: (800) 458-4264

Driving Directions

From Airport

Take I-70 West 3 miles to I-270 South (Exit 232).  Stay on I-270 South for 15 miles to I-44 West (Exit 5).  Stay on I-44 West for 15 miles to Allenton Six Flags Exit (Exit 261).  Turn left at the base of the exit ramp.  Go under the Interstate.  Turn right at the light (Business Loop 44). The plant is 3.5 miles on the left.  Enter gate beyond U.S. Silica sign. The office is on the left.


Product Delivery

Products are delivered via truck and rail.


Union Pacific Railroad

Burlington Northern Santa Fe


Our truck loading times are as follows:

Bulk:  Sunday - Friday, 11 AM - 11 PM

Bagged:  Monday - Friday, 7 AM - 2 PM


Ground: Bulk / Bulk Bags

Fine Ground: Bulk / Packaged (50# bags) / Bulk Bags

Stakeholder Updates

If you are interested in becoming a stakeholder at this location please fill out the form below:

Stakeholder Form