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Minesites Directory

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

Filter by mine details and commodity attributes.
Page 89 of 147 (3508 total)
Milton Rail Yard

Florida, United States · Processing Facility

Operating
Silica SandGypsum
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Parkdale Quarry

Colorado, United States · Open Pit

Operating
Opened
1998-01-01
Workforce
10 employees
Overview
The Parkdale Quarry is a surface, open-pit operation located approximately 11 miles west of Cañon City on U.S. Highway 50. It produces aggregates, granodiorite bedrock, and railroad ballast.
Production
Annual production rate of 4-million tons for new reserve area; supplied approximately 500 tons of ballast daily for the Manitou and Pikes Peak Cog Railway overhaul, totaling 40,000 tons.
Processing
Blasting, crushing, and screening of granodiorite bedrock; on-site processing facility.
Equipment
Blasting, crushing, and screening equipment; on-site processing facility; rail loop.
Expansion
Proposed expansion onto adjacent Bureau of Land Management lands targeting 400-million net tons of aggregate reserves.
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Bennett Alluvial

Colorado, United States · Open Pit

Operating
Silica Sand
Workforce
up to 25,000 work-hours annually
Expansion
Asphalt project in Bennett (CO); Bennett Reservoir related to water rights
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Tidewater Oakland Marine Aggregates

California, United States · Dredging

Operating
Silica Sand
Overview
The operation is a marine aggregates project involving dredging of sand from the San Francisco Bay. The dredged material is then processed at a land-based facility. The company holds leases from the California State Lands Commission for commercial underwater harvesting of sand, primarily used for construction purposes.
Processing
offloading of sand from barges for processing and distribution
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Sunol Aggregates

California, United States · Open Pit

Operating
Silica Sand
End year
2042
Overview
Sunol Aggregates, also known as Sunol Quarry, is an active sand and gravel mine located in Sunol, Alameda County, California, in the United States. The facility is operated by the US mining company Martin Marietta Materials.
Production
approximately 60 million tons of alluvial sand and gravel over the life of the revised permit
Processing
washing the extracted sand and gravel to remove clay and silt; water pumped from active mining pit to wash water pond, then to silt pond for sediment settling; produces crushed rock, road base, and custom blends
Equipment
aggregate processing plant, proposed conveyor system
Expansion
plans for the addition of an asphalt batch plant and a concrete plant at the site
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Sisquoc Aggregates

California, United States · Quarry

Operating
Silica Sand
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Santee Aggregates

California, United States · Quarry

Operating
Silica Sand
Overview
The quarry is a key local source of high-quality sand and gravel for the San Diego construction market.
Processing
extraction and crushing of rock into various sizes of sand and gravel
Equipment
haul trucks, loaders, crushers, and conveyors
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Santa Margarita Aggregates

California, United States · Quarry

Operating
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Sanger Aggregates

California, United States · Quarry

Operating
Silica Sand
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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San Andreas Aggregates

California, USA · Quarry

Closed
Silica Sand
Overview
The facility is part of Martin Marietta's West Division and the California Aggregates District. The plant is situated on the site of a former limestone quarry and cement production facility that was operational from 1926 to 1982.
Processing
crushing
Equipment
crushers
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Merced Aggregates

California, United States · Open Pit

Operating
Silica SandGypsum
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Lakeside-Vigilante Aggregates

California, United States · Quarry

Operating
GraphiteAntimonyBariteScandiumNiobiumSoda Ash+5
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Irwindale Aggregates

California, United States · Open Pit

Operating
Opened
1909-01-01
End year
2030
Overview
The Irwindale Aggregates mine is an active operation located in Irwindale, Los Angeles County, California. It produces sand and gravel through open-pit excavation and dredging, with operations ongoing since 1909 and expected to continue until 2030. The site covers approximately 492 acres and includes on-site crushing and screening.
Processing
crushing and screening operations, conventional dry mining recovery methods, underwater mining processes
Equipment
crushing and screening operations, dredging equipment, automated truck loadout system that includes twelve bins situated above truck scales
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Hughson Aggregates

California, United States · Quarry

Operating
Silica Sand
Opened
1969-01-01
Workforce
Not specified; no change expected from 2023 plant replacement.
Overview
Existing aggregate mining operation (quarry) with a separate asphalt plant. A replacement aggregate plant was proposed in 2023.
Production
Production figures not detailed; 2023 plant replacement will not change production amount.
Processing
Aggregate plant and a separate asphalt plant.
Equipment
Aggregate plant (feeder, screens, crushers, washers, sluice box, dewatering screen, belt conveyors) and asphalt plant (hot plant, propane tank, conveyor, baghouse, mixer, silos, shop skid, shop compressor).
Expansion
A project to construct a replacement aggregate plant was proposed in 2023, with the existing plant to be removed upon completion of the new one. The separate on-site asphalt plant is to remain operational.
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Eagle Valley Aggregates

California, United States · Quarry

Operating
Workforce
maintenance staff
Processing
blasting, excavation, and a fixed processing plant responsible for crushing, washing, and sorting the aggregate materials
Equipment
fixed processing plant responsible for crushing, washing, and sorting the aggregate materials
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Clayton Aggregates

California, United States · Quarry

Operating
Opened
1956-01-01
Overview
The operation is a surface quarry that produces a range of construction aggregates, including crushed stone, gravel, and sand.
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Yavapai Prescott Aggregates

Arizona, United States · Quarry

Operating
Workforce
3 people
Overview
Yavapai Prescott Aggregates is an active surface mine located in Prescott, Yavapai County, Arizona, in the United States. The facility is operated by Martin Marietta Materials and is part of their Arizona Aggregates District within the West Division. The primary commodities produced are aggregates, including sand and gravel for construction purposes.
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Wickenburg Aggregates

Arizona, United States · Quarry

Operating
Overview
The facility is part of Martin Marietta's West Division and falls within the Arizona Aggregates District.
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Hassayampa Sand & Gravel

Arizona, United States · Quarry

Operating
Overview
Hassayampa Sand & Gravel, operated by Martin Marietta Materials, is a surface mine located in Tonopah, Maricopa County, Arizona, in the United States. The primary commodity produced at this site is aggregates, specifically sand and gravel.
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Coolidge Aggregates

Arizona, United States · Open Pit

Operating
Silica Sand
Mine life
12 years
Overview
The facility is part of Martin Marietta's West Division and its Arizona Aggregates District. The primary commodity produced is aggregates.
Production
estimated production of 6.4 million tons of sand, gravel, and aggregate over a mine life of approximately 12 years
Processing
crusher, conveyors, wash plant
Equipment
dozers, excavators, front-end loaders, crusher, conveyors, wash plant, scale, scale house
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Clarkdale Aggregates

Arizona, United States · Open Pit

Operating
Silica Sand
Overview
Clarkdale Aggregates is a surface mining operation located in Clarkdale, Yavapai County, Arizona, in the United States. The facility is operated by Martin Marietta Materials and produces aggregates. The operation involves the removal and processing of earthen materials to produce aggregate.
Processing
material washing and dust control, which utilises water from on-site wells.
Equipment
one crushing and screening plant, one wash plant, a freshwater pond, and two water recycle/settling ponds. Additionally, the facility is equipped with a ready-mix concrete batch plant, a hot-mix asphalt plant, an administrative office, a maintenance and warehouse facility, and a truck scale.
Expansion
an amendment to this plan in 2021 addressed the expansion of the mining area.
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Jones Mill Quarry

Arkansas, United States · Quarry

Operating
Workforce
38 employees
Overview
Surface mine located in Malvern, Hot Spring County, Arkansas. The quarry is part of Martin Marietta's Southwest Division and Arkansas District and has railway access. MSHA Mine ID: 0301586.
Processing
plant operation where equipment feeding, speed, and temperature are monitored; water treatment system for settling of solids in quarry pit sump
Equipment
solar power panels, water treatment system
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Hatton Quarry

Arkansas, United States · Quarry

Operating
Silica Sand
Workforce
Plant Manager and a foreman
Production
Aggregates
Equipment
Processing plant, rock crushers (gyratory, jaw, cone, impact), railway access, all-electric freight switcher, solar panels on office, scale house, lab, and training room buildings.
Expansion
Replacement of a 1971 EMD freight locomotive with an all-electric freight switcher; installation of solar panels on several buildings.
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Black Rock Quarry

Arkansas, United States · Open Pit

Operating
Silica SandGypsum
Companies & ownership
  • Martin Marietta Materials, Inc.
    NYSE:MLM
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Page 89 of 147 (3508 total)