Company lists · Data refreshed September 2026

Top 25 Open pit mining operators based in the United States

Name: Open pit mining operators based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 81 companies tracked

RevenueBase identified 81 open pit mining operators headquartered in the United States as of September 2026 and tracks 5,313 professional contacts across them, including 959 with verified work emails. Elko is the largest hub.

This list covers open pit mining operators headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 17, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 17, 2026 86% judged on-target in blind review

81Companies

5,313Contacts tracked

959Verified emails

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The 25 largest open pit mining operators based in the United States

Ranked by team size

Top 25 of 81 open pit mining operators based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to open pit mining operators: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Boart Longyear	Indirect evidence	West Valley City, UT, United StatesHQ checked Sep 17, 2026	5,001-10,000	3,285 contacts →
	Indirect evidence “Established in 1890, Boart Longyear is the world’s leading innovative provider of drilling services, manufacturer of productivity-driven drilling equipment and performance…” Source: RevenueBase Database · checked Sep 17, 2026
2	GMS Mine Repair & Maintenance	Indirect evidence	Mountain Lake Park, MD, United StatesHQ checked Sep 17, 2026	1,001-5,000	462 contacts →
	Indirect evidence “GMS Mine Repair & Maintenance is the North American leader in underground and surface mine contracting, maintenance and services.” Source: RevenueBase Database · checked Sep 17, 2026
3	Turner Mining Group	Partial evidence	Bloomington, IN, United StatesHQ checked Sep 17, 2026	201-500	196 contacts →
	Partial evidence “Turner Mining Group is a full-service provider to the mining sector with operations throughout the United States.” Source: RevenueBase Database · checked Sep 17, 2026
4	Small Mine Development, LLC	Indirect evidence	Boise, ID, United StatesHQ checked Sep 17, 2026	201-500	179 contacts →
	Indirect evidence “Small Mine Development builds and operates America’s underground mines.” Source: RevenueBase Database · checked Sep 17, 2026
5	Florida Canyon Mining, INC	Strong evidence	Imlay, NV, United StatesHQ checked Sep 17, 2026	201-500	83 contacts →
	Strong evidence “Florida Canyon is an open pit and heap leach gold recovery mining operation that has been operating continuously with sporadic periods of interrupted production since 1986.” Source: RevenueBase Database · checked Sep 17, 2026
6	MES Mining	Partial evidence	Sandy, UT, United StatesHQ checked Sep 17, 2026	11-50	77 contacts →
	Partial evidence “Mining & Environmental Services LLC provides specialized technical expertise, at a high level of excellence, to support our Clients throughout the full process cycle of…” Source: RevenueBase Database · checked Sep 17, 2026
7	Wesco Western Explosives Systems Company	Partial evidence	Salt Lake City, United StatesHQ checked Sep 17, 2026	51-200	61 contacts →
	Partial evidence “WESCO provides rock drilling and blasting solutions to businesses in the construction and mining industries throughout the western United States.” Source: RevenueBase Database · checked Sep 17, 2026
8	Northern Star Pogo Mine	Partial evidence	Fairbanks, AK, United StatesHQ checked Sep 17, 2026	1,001-5,000	58 contacts →
	Partial evidence “The Pogo Mine is an underground gold mining operation located near Delta Junction, Alaska, and is owned and operated by Northern Star Resources Ltd.” Source: RevenueBase Database · checked Sep 17, 2026
9	Pattison Company, LLC	Partial evidence	Garnavillo, IA, United StatesHQ checked Sep 17, 2026	51-200	58 contacts →
	Partial evidence “Pattison Company, LLC is a Mining company located at 23656 Great River Rd, Garnavillo, IA, 52049, United States.” Source: RevenueBase Database · checked Sep 17, 2026
10	Golden Queen Mining CO LLC	Strong evidence	Mojave, CA, United StatesHQ checked Sep 17, 2026	201-500	51 contacts →
	Strong evidence “Golden Queen Mining Company, LLC operates a gold and silver, open pit, heap leach operation on its Soledad Mountain property, located outside of Mojave, California.” Source: RevenueBase Database · checked Sep 17, 2026
11	Stout Excavating Group	Partial evidence	San Antonio, TX, United StatesHQ checked Sep 17, 2026	501-1,000	46 contacts →
	Partial evidence “Stout Excavating Group (SEG) and Stout Excavating Group Texas (SEGTX) is a premier mining and civil construction contractor delivering large-scale earthmoving, mine development…” Source: RevenueBase Database · checked Sep 17, 2026
12	Montana Resources	Partial evidence	Butte, MT, United StatesHQ checked Sep 17, 2026	201-500	34 contacts →
	Partial evidence “Butte grew as an early urban industrial center in the Rocky Mountain West to become legend as The Mining City.” Source: RevenueBase Database · checked Sep 17, 2026
13	Secopsa USA	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 17, 2026	201-500	32 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
14	Cowin & Company, INC	Partial evidence	Birmingham, AL, United StatesHQ checked Sep 17, 2026	51-200	31 contacts →
	Partial evidence “Welcome to: Cowin & Company, Inc- Mining Contractors and Engineers For three generations, Cowin & Company, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
15	NISS	Partial evidence	Kellogg, ID, United StatesHQ checked Sep 17, 2026	51-200	30 contacts →
	Partial evidence “Nasco Industrial Services & Supply (NISS) is a full-service mining supply and contract drilling and General Contracting Mining agency, built to serve the industries that make…” Source: RevenueBase Database · checked Sep 17, 2026
16	AK Drilling INC	Indirect evidence	Butte, MT, United StatesHQ checked Sep 17, 2026	11-50	29 contacts →
	Indirect evidence “Company Profile AK Drilling is a global leader in exploration and drilling services.” Source: RevenueBase Database · checked Sep 17, 2026
17	American Mining And Tunneling	Partial evidence	Spokane, WA, United StatesHQ checked Sep 17, 2026	51-200	21 contacts →
	Partial evidence “American Mining and Tunneling LLC provides superior expertise and experienced services to the mining industry from beginning stage exploration to the end of mine life reclamation.” Source: RevenueBase Database · checked Sep 17, 2026
18	Dykon Blasting Corp	Indirect evidence	Tulsa, OK, United StatesHQ checked Sep 17, 2026	11-50	18 contacts →
	Indirect evidence “We are a precision drilling and blasting company specializing in the application of high explosives for controlled blasting for the excavation of rock and reinforced concrete on…” Source: RevenueBase Database · checked Sep 17, 2026
19	Florida Energy Services, INC	Indirect evidence	Estero, FL, United StatesHQ checked Sep 17, 2026	51-200	15 contacts →
	Indirect evidence “Florida Energy Services, Inc.(FESI) was founded more than 40 years ago (1982) in Crystal River Florida.” Source: RevenueBase Database · checked Sep 17, 2026
20	Redcor Drilling, INC	Indirect evidence	Winnemucca, NV, United StatesHQ checked Sep 17, 2026	51-200	13 contacts →
	Indirect evidence “Founded in 2008, Redcor Drilling, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
21	Palmetto Rock	Indirect evidence	Duncan, SC, United StatesHQ checked Sep 17, 2026	11-50	11 contacts →
	Indirect evidence “For over 25 years, Palmetto Rock Services, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
22	General Drilling INC	Indirect evidence	Fishers, IN, United StatesHQ checked Sep 17, 2026	11-50	11 contacts →
	Indirect evidence “General Drilling is a leader in contract blast hole drilling services.” Source: RevenueBase Database · checked Sep 17, 2026
23	Legarza Exploration	Partial evidence	Elko, NV, United StatesHQ checked Sep 17, 2026	11-50	11 contacts →
	Partial evidence “Legarza Exploration is an earthmoving construction company with a specialized focus on mining and exploration support services.” Source: RevenueBase Database · checked Sep 17, 2026
24	American Mine Services	Partial evidence	Boulder, CO, United StatesHQ checked Sep 17, 2026	51-200	10 contacts →
	Partial evidence “American Mine Services was founded in 1967 and has since been serving the mining and civil construction industries in the evaluation, design, and construction of mines…” Source: RevenueBase Database · checked Sep 17, 2026
25	Venture Drilling East, LLC	Partial evidence	Conyers, GA, United StatesHQ checked Sep 17, 2026	11-50	8 contacts →
	Partial evidence “Venture Drilling East, LLC is a mining & metals company based out of 1695 Old Covington Road NE, Conyers, Georgia, United States.” Source: RevenueBase Database · checked Sep 17, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: open pit mining operators. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names open pit mining operators.
Partial evidence: Its own public description names part of open pit mining operators, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name open pit mining operators. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 81 open pit mining operators based in the United States

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Open pit mining operators based in the United States at a glance

As of Sep 17, 2026

18.1%Verified-email coverage

65.6Average contacts per company

11-50Median size (employees)

3.7%Largest-city concentration · Elko

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 81 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among open pit mining operators, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “open pit mining operators”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names open pit mining operators), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among open pit mining operators, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 959 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 17, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names open pit mining operators, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many open pit mining operators are there based in the United States?

RevenueBase identified 81 open pit mining operators headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Boart Longyear, headquartered in West Valley City, tops this list with the largest team on record.

Which city has the most open pit mining operators?

Elko leads with 3 headquartered companies, followed by Butte (2) and Lincoln (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 959 verified decision-maker contacts tracked across these 81 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 17, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.