Mill Creek, OK

4800 Oklahoma Highway 1 North
Mill Creek, OK 74856
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Our surface mines in Mill Creek use natural gas and electricity to produce whole grain, ground and fine ground silica through hydraulic mining. The reserves are part of the Oil Creek Formation in south central Oklahoma. Since acquiring the facility, we renovated and upgraded its production capabilities to enable it to produce multiple products through various processing methods, including hydraulic sizing, fluid bed drying, grinding and air sizing.

These production techniques allow the Mill Creek facility to meet a wide variety of focused specifications on product composition for glass, foundry, fillers and extenders, building product and oil and gas proppant customers.

We acquired the Mill Creek facility in 1987 by merger with the Pennsylvania Glass Sand Corporation, which had historically used the property to produce whole grain silica for customers in industrial and specialty products end markets.

The facility is located approximately 100 miles southeast of Oklahoma City and is accessible by major highways including U.S. Interstate 35. 



The workforce at the Mill Creek plant includes multiple generations of local families. Many of the Mill Creek employees volunteer their free time to fire and rescue, youth activities, and participate in local commissions and boards. The Mill Creek plant is part of the landscape of Johnston County and strives to minimize its impact on the environment. Nearly all of the water used in mining and processing is recycled, and the reclaimed quarries and surroundings have become rich wildlife habitats.


Delivery & Logistics

By Rail

By Truck

Unground Bulk: 24 Hours/ Day @ Mill Creek North

Ground Bulk: Monday 1 AM - Friday, 10 PM @ Mill Creek South

Ground Bag: Monday – Friday, 8 AM – 2 PM @ Mill Creek South


Unground: Bulk only

Ground: Sil-Co-Sil bulk only, Min-U-Sil packaged (50# bags, intermediate bulk bags)


From Oklahoma City

Head South on I-35 toward Dallas (71 miles). Take Exit #55 (Davis/Duncan). Turn left (East) on Highway 7. Stay on Highway 7 passing through Davis and Sulphur. Highway 7 ends at Highway 1 (18 miles). Turn right (South) on Highway 1. U.S. Silica's North Plant is one mile south on the right. U.S. Silica's South Plant is five miles south on the left. The administrative office is located at the South Plant.

From Dallas

Head North on I-35 toward Oklahoma City (115 miles). Take Exit #40 (Springer). Turn right (East) on Highway 53. Stay on Highway 53 (8 miles). Turn right (South) on Highway 53A at the Ardmore Airpark. Proceed for 1 mile. Turn left (East) back on Highway 53. Continue for 5 miles. Highway 53 ends at Highway 177. Turn left (North) and proceed for 8 miles. After passing a sign on the right side of the road titled "Lifestyle Center of America," you will see another sign on the right titled "Mill Creek." Turn right (East) and proceed for 8 miles, cross over the railroad tracks, and turn left (North) at the stop sign. Proceed north 1 mile. U.S. Silica's South Plant is on the right. U.S. Silica's North Plant is five miles north on the left. The administrative office is located at the South Plant.


Careers at US Silica

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When you join the U.S. Silica team, you become a part of a resilient, dynamic culture. We're proud of our 100+ year legacy of doing things right, as we focus on the next 100 years by helping the communities where we live and work thrive.

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