# Relationship history for MSHA mine 4000577

Current hierarchy: **Bouldin La Due → Double B Mining Inc → No 24**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Grundy Mining Company Inc → No 24; 1950-01-01 to 1976-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Tennessee Consolidated Coal Company Inc → No 24; 1950-01-01 to 1976-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Tennessee Consolidated Coal Company Inc → Grundy Mining Company Inc; 1950-01-01 to 1976-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Tennessee Consolidated Coal Company → No 24; 1976-09-01 to 1987-07-12; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → No 24; 1976-09-01 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Tennessee Consolidated Coal Company; 1976-09-01 to 1987-07-12; source msha-controller-operator-history
- **operator_operates_mine:** Kellys Creek Resources Inc → No 24; 1987-07-13 to 1993-06-27; source msha-controller-operator-history
- **controller_controls_mine:** Rogers Hollis → No 24; 1987-07-13 to 1995-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Hollis → Kellys Creek Resources Inc; 1987-07-13 to 1993-06-27; source msha-controller-operator-history
- **controller_controls_mine:** Bouldin La Due → No 24; 1989-05-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Double B Mining Inc → No 24; 1993-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bouldin La Due → Double B Mining Inc; 1993-06-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → No 24; 2011-06-01 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Tennessee Consolidated Coal Company; 2011-06-01 to 1987-07-12; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → No 24; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Tennessee Consolidated Coal Company; 2016-07-26 to 1987-07-12; source msha-controller-operator-history