Company: ACA
Filing Date: 2025-02-28
Form Type: 10-K
Source: 0001739445-25-000026
Chunk: 74

Company: Arcosa, Inc.
Filing Date: 2025-02-28
Form: 10-K
Item: Item 2
Chunk 74
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 accordance with S-K 1300. Under S-K 1300, mineral resources may not be classified as “mineral reserves” unless the determination has been made by a qualified person that the mineral resources can be the basis of an economically viable project. 

The Company’s estimates of mineral reserves and mineral resources are determined internally by competent professionals, including engineers and geologists, using industry best practices and internal controls. These estimates are based on geologic data, mineral ownership information, and current or proposed operating plans. Our mineral reserves are proven and probable reserves that could be economically and legally extracted or produced at the time of the reserve determination, considering grade and quality of the minerals and all material modifying factors. These estimates are periodically updated to reflect past mining production, updated mine plans, new exploration information, and other geologic or mining data. Acquisitions or dispositions of mining properties will also change these estimates. Changes in mining or processing methods may increase or decrease the recovery basis for the estimates. The ability to update or modify the estimates of our mineral reserves is restricted to competent geologists and mining engineers and material modifications are documented. Our estimates of mineral reserves and mineral resources, and supporting information, have been assessed by the John T. Boyd Company, a qualified person, which is unaffiliated with the Company and conforms to the requirements under S-K 1300 for qualified persons. For more information related to the risks associated with the estimates of mineral reserves and mineral resources, see Item 1A “Risk Factor - Risks Related to our Business and Operations.”

Mining Properties

During the year ended December 31, 2024, we produced 30.4 million tons of natural aggregates and specialty materials from our mining and processing operations located in the U.S. and Canada, all of which, we believe, have adequate road and/or railroad access. The Company reports its mining operations primarily through the following commodity groupings:

Natural Aggregates – includes operations which specialize in the production of sand, gravel, crushed stone, and stabilized material. Our aggregates operations are grouped into the “Texas” and “All Other” geographic regions, and shipments from an individual quarry or stationary crushing location are generally limited in geographic scope because the cost of transportation to customers is high relative to the value of the product itself.

Specialty Materials – includes operations which produce lightweight aggregates, select natural aggregates, and milled or processed specialty building products and agricultural products. Since specialty materials have a much wider, multi-state distribution area due to their higher value relative to their distribution costs as