# Relationship history for MSHA mine 1514229

Current hierarchy: **Hamilton Gary D → Tabco Coal Corp → No 1**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Noreland Coal Company Inc → No 1; 1983-09-01 to 1984-03-13; source msha-controller-operator-history
- **controller_controls_mine:** Tackett Sterling & Michael Vance → No 1; 1983-09-01 to 1984-03-13; source msha-controller-operator-history
- **controller_controls_operator:** Tackett Sterling & Michael Vance → Noreland Coal Company Inc; 1983-09-01 to 1984-03-13; source msha-controller-operator-history
- **operator_operates_mine:** Dixie Lee Coal Company Inc → No 1; 1984-03-14 to 1985-05-21; source msha-controller-operator-history
- **controller_controls_mine:** Paige Roger → No 1; 1984-03-14 to 1985-05-21; source msha-controller-operator-history
- **controller_controls_operator:** Paige Roger → Dixie Lee Coal Company Inc; 1984-03-14 to 1985-05-21; source msha-controller-operator-history
- **operator_operates_mine:** Bren'S Mining Company Inc → No 1; 1985-05-22 to 1985-06-17; source msha-controller-operator-history
- **controller_controls_mine:** Danny D Mead → No 1; 1985-05-22 to 1985-06-17; source msha-controller-operator-history
- **controller_controls_operator:** Danny D Mead → Bren'S Mining Company Inc; 1985-05-22 to 1985-06-17; source msha-controller-operator-history
- **operator_operates_mine:** H & G Coal Company Inc → No 1; 1985-06-18 to 1986-05-22; source msha-controller-operator-history
- **controller_controls_mine:** Hamilton Roger → No 1; 1985-06-18 to 1986-05-22; source msha-controller-operator-history
- **controller_controls_operator:** Hamilton Roger → H & G Coal Company Inc; 1985-06-18 to 1986-05-22; source msha-controller-operator-history
- **operator_operates_mine:** Tabco Coal Company Inc → No 1; 1986-05-23 to 1986-07-17; source msha-controller-operator-history
- **controller_controls_mine:** Hall Clemit → No 1; 1986-05-23 to 1987-08-24; source msha-controller-operator-history
- **controller_controls_operator:** Hall Clemit → Tabco Coal Company Inc; 1986-05-23 to 1986-07-17; source msha-controller-operator-history
- **operator_operates_mine:** Tabco Coal Corp → No 1; 1986-07-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hamilton Gary D → No 1; 1986-07-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hamilton Gary D → Tabco Coal Corp; 1986-07-18 to current/open; source msha-controller-operator-history