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Mill Creek, OK


U.S. Silica's Mill Creek plant mines from the "Oil Creek" formation, producing a wide range of silica products - from fine-grain silica "flour" to whole grain sand that is high in natural crystalline silica. This high-purity silica is a perfect multi-purpose sand for use in all types of glass, foundry molds, well stimulation, and building products.


Sand mining has been a part of south central Oklahoma's economy for nearly 100 years. Operations in Mill Creek were originally established in 1918. By the 1940s the mine was being operated by the Hazel-Atlas Glass Company for their plant nearby in Ada. In 1947, the operation in Mill Creek was purchased by the Pennsylvania Glass Sand Corporation, which later merged with Ottawa Silica to form today's U.S. Silica Company.


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.

Customer Service Contact


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

Oil & Gas

Industrial Specialty Products

Plant Switchboard

(580) 384-5241

Physical Address

4800 Oklahoma Highway 1 North
Mill Creek, OK 74856

Mailing Address

P.O. Box 36
UPS – Route 7
Mill Creek,  OK  74856
Phone: (580) 384-5558

Driving Directions

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.


Product Delivery

Whole Grain Bulk Trucks (North Plant)

Monday 12 AM - Friday 10 PM
Saturday 7 AM – 2 PM
Other weekend hours by request with advance scheduling.

Ground Silica Bulk Trucks (South Plant)

Monday 12 AM - Friday 10 PM
Advance scheduling required

Packaged Fine Ground Silica Trucks (South Plant)

Monday – Friday 8 AM – 2 PM
Advance scheduling required, vans only.

Stakeholder Updates

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

Stakeholder Form