Mine · Washington County, Nebraska, United States
Fort Calhoun Underground Mine
Fort Calhoun Underground Mine is a mine in Washington County, Nebraska, United States, owned by Martin Marietta Materials Inc.
Facts
Every value links to its source, and to the source's own record where it has one. Licences and last-checked dates are per row.
| Fact | Value | Source |
|---|---|---|
| Location | Washington County | MSHA Mines Data Set · Public domain · checked 24 Oct 2026 |
| Status | Operating (active) | MSHA Mines Data Set · Public domain · checked 24 Oct 2026 |
| Commodities | crushed limestone (mainly crushed limestone) | MSHA Mines Data Set · Public domain · checked 24 Oct 2026 |
| Owner | Martin Marietta Materials Inc (controls the operator) | MSHA Mines Data Set · Public domain · checked 24 Oct 2026 |
| Operator | Martin Marietta Materials Inc | MSHA Mines Data Set · Public domain · checked 24 Oct 2026 |
| Employees | 91 people (annual average, in 2025) | MSHA Mines Data Set · Public domain · checked 24 Oct 2026 |
| Mine type | Underground | MSHA Mines Data Set · Public domain · checked 24 Oct 2026 |
| Coordinates | 41.4739, -96.0125 | MSHA Mines Data Set · Public domain · checked 24 Oct 2026 |
Research on this mine and its owner.Who owns it up to the parent company, its permits, resources and offtake, and an introduction to the owner.
Request researchHow its owner compares
Martin Marietta Materials Inc owns 29 of the 2,675 mines in the United States in our data with a named owner; 3 owners have more. Counts cover the mines in our data that name an owner, holder or operator; an asset with several owners counts for each.
| Owner in United States | Rank | Mines | Share |
|---|---|---|---|
| Alpha Metallurgical Resources Inc | 1st | 56 | 2.1% |
| Sev.en Global Investments a.s. | 2nd | 50 | 1.9% |
| Rosebud Mining Company | 3rd | 40 | 1.5% |
| Martin Marietta Materials Inc | 4th | 29 | 1.1% |
| Metinvest B V | 4th | 29 | 1.1% |
Nearby
Within 50 km of this mine: 20 data centers (4 operating, 791 MW) and 4 power plants (3 operating, 2,821 MW), measured from the coordinates in the facts above. The table shows the nearest 6, up to 3 per kind.
| Name | Kind | Size | Status | Distance |
|---|---|---|---|---|
| Verizon | Data center | — | — | 15 km |
| Google Omaha | Data center | 237 MW | Operating | 16 km |
| Data center | — | — | 16 km | |
| North Omaha | Power plant | 645 MW | Operating | 17 km |
| Big Elk Solar | Power plant | 100 MW | Planned | 23 km |
| Walter Scott Jr Energy Center | Power plant | 1,648 MW | Operating | 36 km |
Owner, operator and place
More from Martin Marietta Materials Inc
Other mines in Nebraska
Data on this page
- Source: U.S. Energy Information Administration (Sep 2026). EIA-860 / 860M / 923, Public domain.
- Epoch AI. Epoch AI data centers, CC BY 4.0.
- MSHA Mines Data Set. MSHA Mines Data Set, Public domain.
- © OpenStreetMap contributors. OpenStreetMap data centers, ODbL 1.0.