Fort Calhoun Underground Mine — Inspections
Total: 63 inspections
| Begin | End | Operator | Hours | Inspectors |
|---|---|---|---|---|
| 01/19/2026 | 01/30/2026 | Martin Marietta Materials Inc. | 59.25 | 1 |
| 11/13/2025 | 11/13/2025 | Martin Marietta Materials Inc. | 8.75 | 1 |
| 10/27/2025 | 11/12/2025 | Martin Marietta Materials Inc. | 84.25 | 1 |
| 08/26/2025 | 09/03/2025 | Martin Marietta Materials Inc. | 77.00 | 2 |
| 06/02/2025 | 06/17/2025 | Martin Marietta Materials Inc. | 158.75 | 3 |
| 02/10/2025 | 03/12/2025 | Martin Marietta Materials Inc. | 137.00 | 2 |
| 10/21/2024 | 11/21/2024 | Martin Marietta Materials Inc. | 111.50 | 2 |
| 08/20/2024 | 08/20/2024 | Martin Marietta Materials Inc. | 3.75 | 1 |
| 07/16/2024 | 07/25/2024 | Martin Marietta Materials Inc. | 128.00 | 3 |
| 06/10/2024 | 06/18/2024 | Martin Marietta Materials Inc. | 105.25 | 2 |
| 05/22/2024 | 10/22/2024 | Martin Marietta Materials Inc. | 31.75 | 4 |
| 04/24/2024 | 04/24/2024 | Martin Marietta Materials Inc. | 3.25 | 2 |
| 04/10/2024 | 04/12/2024 | Martin Marietta Materials Inc. | 16.75 | 1 |
| 03/18/2024 | 03/21/2024 | Martin Marietta Materials Inc. | 75.00 | 2 |
| 12/05/2023 | 12/19/2023 | Martin Marietta Materials Inc. | 76.00 | 1 |
| 08/21/2023 | 09/01/2023 | Martin Marietta Materials Inc. | 71.00 | 1 |
| 08/16/2023 | 08/16/2023 | Martin Marietta Materials Inc. | 1.50 | 1 |
| 05/23/2023 | 06/02/2023 | Martin Marietta Materials Inc. | 64.00 | 1 |
| 03/20/2023 | 03/21/2023 | Martin Marietta Materials Inc. | 24.00 | 2 |
| 01/31/2023 | 02/01/2023 | Martin Marietta Materials Inc. | 4.00 | 1 |
| 01/17/2023 | 01/23/2023 | Martin Marietta Materials Inc. | 69.25 | 2 |
| 11/13/2022 | 11/17/2022 | Martin Marietta Materials Inc. | 53.50 | 1 |
| 09/20/2022 | 09/20/2022 | Martin Marietta Materials Inc. | 4.25 | 1 |
| 08/10/2022 | 08/17/2022 | Martin Marietta Materials Inc. | 63.25 | 1 |
| 05/16/2022 | 05/19/2022 | Martin Marietta Materials Inc. | 35.00 | 1 |
| 01/27/2022 | 04/07/2022 | Martin Marietta Materials Inc. | 52.75 | 2 |
| 01/03/2022 | 01/07/2022 | Martin Marietta Materials Inc. | 43.75 | 1 |
| 01/03/2022 | 01/05/2022 | Martin Marietta Materials Inc. | 10.75 | 1 |
| 10/30/2021 | 10/30/2021 | Martin Marietta Materials Inc. | 13.50 | 1 |
| 10/12/2021 | 10/20/2021 | Martin Marietta Materials Inc. | 65.25 | 1 |
| 07/19/2021 | 07/27/2021 | Martin Marietta Materials Inc. | 64.25 | 1 |
| 05/03/2021 | 05/03/2021 | Martin Marietta Materials Inc. | 5.75 | 1 |
| 04/16/2021 | 04/27/2021 | Martin Marietta Materials Inc. | 53.00 | 1 |
| 01/12/2021 | 01/20/2021 | Martin Marietta Materials Inc. | 50.00 | 1 |
| 12/07/2020 | 12/17/2020 | Martin Marietta Materials Inc. | 73.25 | 1 |
| 08/19/2020 | 08/26/2020 | Martin Marietta Materials Inc. | 29.00 | 1 |
| 06/22/2020 | 07/09/2020 | Martin Marietta Materials Inc. | 61.50 | 1 |
| 05/17/2020 | 05/20/2020 | Martin Marietta Materials Inc. | 32.75 | 1 |
| 03/09/2020 | 03/12/2020 | Martin Marietta Materials Inc. | 37.00 | 1 |
| 12/19/2019 | 12/19/2019 | Martin Marietta Materials Inc. | 7.50 | 1 |
| 12/05/2019 | 12/05/2019 | Martin Marietta Materials Inc. | 12.50 | 1 |
| 10/07/2019 | 10/08/2019 | Martin Marietta Materials Inc. | 15.50 | 1 |
| 09/26/2019 | 09/26/2019 | Martin Marietta Materials Inc. | 5.50 | 1 |
| 09/16/2019 | 09/17/2019 | Martin Marietta Materials Inc. | 17.00 | 1 |
| 07/01/2019 | 07/02/2019 | Martin Marietta Materials Inc. | 19.00 | 1 |
| 04/01/2019 | 04/02/2019 | Martin Marietta Materials Inc. | 19.00 | 1 |
| 02/28/2019 | 02/28/2019 | Martin Marietta Materials Inc. | 8.50 | 1 |
| 01/09/2019 | 10/08/2019 | Martin Marietta Materials Inc. | 64.50 | 2 |
| 01/07/2019 | 01/08/2019 | Martin Marietta Materials Inc. | 15.00 | 1 |
| 12/17/2018 | 12/19/2018 | Martin Marietta Materials Inc. | 34.00 | 1 |