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Minesites Directory

Browse minesites. Each card shows company ownership and their most recent associated articles.

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Page 77 of 147 (3508 total)

Celatom Mine

Oregon, United States · Open Pit

Operating

Silica Sand

Workforce

13 employees

Overview

The Celatom Mine is an open-pit surface mine located near Drewsey in Harney and Malheur Counties, approximately 90 miles west of Ontario, Oregon. The mine consists of three open-pit mines. In 2008, the mine was operating on approximately 450 acres of federal, state, and private land.

Equipment

excavators, articulated hauling trucks, scrapers, dozers, front-end loaders, road graders, and other support equipment

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Deep Mill Level Zone (DMLZ)

Papua, Indonesia · Block Cave

Operating

CopperGoldSilver

Opened

2015-01-01

End year

2041

Overview

Underground block/panel cave mine in the Grasberg minerals district, Papua, Indonesia, producing copper, gold, and silver. Production ramp-up began in 2015 with a projected mine life through 2041.

Production

peak daily tonnage of 80,000 tonnes per day (projected), 9,800 tonnes per day (average in 2019)

Processing

block caving, assisted by hydraulic fracturing; ore transported to mill via inclined conveyor after crushing

Equipment

fleet of haul trucks and loaders, underground gyratory crushers, two crushers (each 2,500-3,000 tons per hour capacity), 4.9 km inclined conveyor system with PROK pulleys

Expansion

initiated caving and began ramping up production in 2015, successful ramp-up necessitated closure of the Deep Ore Zone (DOZ) mine

Companies & ownership

PT Freeport Indonesia

Vale plant

Oregon, United States · Processing Facility

Operating

Silica Sand

Opened

1985-01-01

Workforce

53 employees

Overview

The Vale plant is the world's third-largest diatomaceous earth facility.

Production

approximately 120,000 tons annual production capacity

Processing

using natural gas, electricity, and soda ash to produce calcined and flux-calcined DE. The plant is equipped with two kilns.

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Tucumcari Plant

New Mexico, United States · Processing Facility

Operating

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Troup Plant

Texas, United States · Processing Facility

Operating

Silica Sand

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Sparta Plant

Wisconsin, United States · Dredging

Operating

Silica Sand

Opened

2013-01-01

End year

2032

Mine life

20 years

Workforce

36

Overview

The Sparta Plant produces whole grain silica products, which are ideal substrates for oil and gas proppants. The reserve geology consists of high purity alluvial sands from the Wonewoc Formation, known for round, coarse grains with superior crush strength.

Production

As of May 2025, the mine had produced 708 thousand tons of sand during that year. Planned capacity at opening was 800,000 tons annually. The facility previously had 1.5 million tons of oil and gas proppant capacity.

Processing

The processing method involves sorting and drying the sand using vibratory screens that utilize gravity and natural gas dryers.

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Rockwood Plant

Michigan, United States · Processing Facility

Operating

Silica Sand

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Phalanx Plant

Ohio, United States · Processing Facility

Operating

Silica Sand

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Pacific Plant

Missouri, United States · Open Pit

Operating

Silica Sand

Workforce

41 employees (2020 data)

Overview

The Pacific Plant, operated by U.S. Silica Holdings, Inc., is an active surface operation in Pacific, Missouri, extracting 98.8% whole grain silica sand from the St. Peter's Formation. The plant processes silica into whole grain, ground, and fine ground products for various industries including flat glass, chemicals, and oil and gas. An 800,000-ton-per-year expansion was completed in 2015.

Production

800,000-ton-per-year expansion

Processing

hydraulic sizing, fluid bed drying, grinding, dry screening, classifying, and microsizing

Expansion

In 2014, U.S. Silica announced an 800,000-ton-per-year expansion of the Pacific plant with a capital investment of approximately $33 million, driven by increased demand for fine grade products in the oil and gas market. This expansion was expected to be online in the third quarter of 2015.

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Ottawa Plant

Illinois, United States · Processing Facility

Operating

Silica Sand

Workforce

145 hourly and salaried personnel

Overview

The Ottawa Plant is a surface silica sand mining and processing facility operated by U.S. Silica Company, a subsidiary of US Silica Holdings, Inc. It is located west of Ottawa, Illinois, and has been in operation for over 100 years.

Production

Annual production rate of 2.2 million tons of silica. Nominal capacity of the processing plant is 3.29 million tons of finished sand per year.

Processing

Wet and dry processing. Wet processing includes washing, hydraulic sizing, and mechanical dewatering. Sand is then dried in natural gas-fired fluidized bed dryers. Further processing includes screening, sizing, grinding, and blending. The plant operates 24 hours a day, 365 days a year.

Equipment

Wet processing plant, sizing and fine sand plant, grinding mills, ASTM circuit, four natural gas-fired sand dryers, high-efficiency scrubbers, filters or baghouses, mineral separator, screens, conveyors, mobile equipment fleet.

Expansion

Planning to install a crusher system as an alternative to water cannons for creating the sand slurry.

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Oregon Plant

Oregon, United States · Processing Facility

Operating

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Montpelier Plant

Virginia, United States · Open Pit

Operating

Silica Sand

Workforce

27 employees

Overview

The Montpelier Plant is an active surface mine in Hanover County, Virginia, producing Aplite through hard rock mining. The site includes a processing plant on 824 acres owned by the company.

Processing

hydraulic crushing and sizing, washing, fluid bed drying, and grinding

Expansion

U.S. Silica acquired the plant in 1993 and has since invested over $3 million in improvements to the facility and equipment.

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Mill Creek Plant

Oklahoma, United States · Open Pit

Operating

Silica Sand

Workforce

approximately 24 miners

Overview

The Mill Creek Plant comprises a quarry (Mill Creek North Plant #39) and a processing facility (Mill Creek Plant #37), producing high-purity silica sand for glass, foundry, and oil and gas proppants.

Processing

hydraulic sizing, fluid bed drying, grinding, and air sizing. Nearly all of the water used in mining and processing is recycled.

Expansion

renovated and upgraded the plant's production capabilities

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Mapleton Plant

Pennsylvania, United States · Open Pit

Operating

Silica Sand

Opened

1923-01-01

Overview

The Mapleton Plant is a surface mine and processing facility operated by U.S. Silica Company, extracting whole grain silica sand from the Ridgeley Sandstone formation. It produces various silica products for glass, building, recreational, and oil and gas proppant markets.

Processing

hydraulic sizing, fluid bed drying, scalping, and a low iron circuit

Expansion

The processing plant has been renovated and upgraded to produce multiple products.

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Lovell Plant

Nevada, United States · Processing Facility

Operating

Silica Sand

Opened

1959-01-01

Overview

The world's largest producing diatomaceous earth (DE) plant, also known as the Colado plant. It processes ore from the Colado mining complex and also produces perlite.

Production

world's largest producing DE plant

Processing

three kilns for producing calcined and flux-calcined filter aids and functional additives, perlite expander

Equipment

three kilns, perlite expander, dryer

Expansion

In 1993, a perlite expander was added to the facility. Investments in a new dryer on one of the kilns to improve product quality.

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Lamesa Plant

Texas, United States · Processing Facility

Operating

Silica Sand

Opened

2018-01-01

Mine life

30 years

Overview

Lamesa Plant is an active surface mine and processing operation owned and operated by US Silica Holdings, Inc. The facility is located in Dawson County, Texas. It produces frac sand for the oil and gas industry from whole grain silica.

Production

6 million tons

Processing

wet plant and a dry plant to produce the finished silica sand products

Equipment

haul trucks, processing plant, intermediate stockpile, screening plant, loadout capabilities, leased mobile equipment

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Kosse Plant

Texas, United States · Open Pit

Care And Maintenance

Silica SandKaolin

Opened

1964-01-01

Overview

The Kosse Plant is a surface mine located in Kosse, Limestone County, Texas, extracting sand and kaolin clay from the "Simsboro Sand" formation. It produces industrial and specialty products such as sand for glass, construction, recreational uses, and frac sand, as well as kaolin clay for the paint and brick industries.

Production

Production output increased from 50 tons per hour to 120 tons per hour after a 2018 expansion. A new silo has a storage capacity of 3,000 tons of sand.

Processing

washing, hydraulic sizing, fluid bed drying, dry screening

Equipment

new sand dryer technology, new silo

Expansion

$8 million investment in September 2018, including new sand dryer technology that more than doubled production output from 50 tons per hour to 120 tons per hour, and construction of a new silo with a storage capacity of 3,000 tons of sand.

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Jackson Plant

Tennessee, United States · Open Pit

Operating

Silica Sand

Opened

1986-01-01

Overview

The U.S. Silica Holdings, Inc. Jackson Plant is a silica sand mine and processing facility located in Jackson, Madison County, Tennessee, United States. It processes mid to fine-grain sand deposits from the Claiborne Formation, which are noted to be 99% pure silica. The plant produces a range of products, including SIL-CO-SIL® ground silica, serving various markets such as fiberglass, building products, ceramics, fillers and extenders, and recreation. The site encompasses 132 acres of owned land.

Production

produces a range of products, including SIL-CO-SIL® ground silica

Processing

rotary drying, screening, and grinding. The plant utilizes natural gas and electricity in its production processes. All process water is recycled.

Expansion

U.S. Silica has renovated and upgraded the facility's production capabilities.

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Hurtsboro Plant

Alabama, United States · Processing Facility

Operating

Silica Sand

Workforce

9 employees

Overview

The Hurtsboro Plant is a surface silica sand mine and processing facility located near Hurtsboro in Macon County, Alabama. The plant processes whole grain silica, which is used by foundry companies and roofing manufacturers.

Production

produces whole grain silica, construction sand and gravel

Processing

trucking sand from surrounding mining locations to the central facility, hydraulic sizing, screening, fluid bed drying, uses propane and electricity

Equipment

leased mobile equipment, loaders

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Friedens Plant

Pennsylvania, United States · Processing Facility

Operating

Silica Sand

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Festus Plant

Missouri, United States · Processing Facility

Operating

Silica Sand

Overview

The Festus Plant, acquired by U.S. Silica in August 2017, processes high-quality Northern White sand from the St. Peter Sandstone formation into frac sand for oil and gas proppants.

Production

Annual production capacity of 1.2 million tons, with potential for expansion to 1.6 million tons per year.

Processing

Uses natural gas and electricity; produces Microproppants (Micro Stim™ and Micro Stim Plus™) and U.S. Silica 100 Mesh.

Expansion

Expansion completed after 2017 acquisition to increase capacity; potential for further expansion to 1.6 million tons per year.

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Dubberly Plant

Louisiana, United States · Dredging

Operating

Silica Sand

Opened

1970-01-01

Workforce

43 employees

Overview

The Dubberly Plant, operated by U.S. Silica Company, a subsidiary of US Silica Holdings, Inc., is a surface dredge mine and processing facility located in Dubberly, Webster Parish, Louisiana. The primary commodity is fine grain silica sourced from the Sparta Formation, processed for glass, chemical, roofing, brick, and foundry industries. It also produces shale frac sand.

Processing

screening, washing, fluid bed drying, and conditioning

Equipment

processing plant

Expansion

renovations and upgrades to its production capabilities

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Crane Plant

Texas, United States · Open Pit

Operating

Silica Sand

Opened

2018-01-01

End year

2047

Mine life

30 years

Overview

The Crane Plant is an active surface mine that produces whole grain silica, specifically proppant (frac) sand. The reserves consist of windblown dune sand from the Quaternary age.

Production

4 million ton per year plant; 121.9 million estimated saleable product tons of frac sand reserves as of December 31, 2022

Processing

wet plant, intermediate stockpile, dry plant, screening plant, and loadout

Equipment

heavy mobile equipment, processing plant

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Columbia Plant

South Carolina, United States · Open Pit

Operating

Silica Sand

Opened

1987-01-01

Overview

Surface mine and processing facility producing whole grain, ground, and fine ground silica from the Tuscaloosa Formation, serving multiple markets including glass, building products, fillers and extenders, filtration, and oil and gas proppants.

Processing

hydraulic sizing, fluid bed drying, scalping, and grinding

Expansion

Processing methods have been renovated and upgraded since its acquisition.

Companies & ownership

U.S. Silica Holdings, Inc.
NYSE:SLCA

Page 77 of 147 (3508 total)