# Relationship history for MSHA mine 1504085

Current hierarchy: **Hamilton J Byron → J B G Coal Corp → #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:** Kim Coal Company → #1; 1950-01-01 to 1980-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Jones Edgar Et Al → #1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jones Edgar Et Al → Kim Coal Company; 1950-01-01 to 1980-02-14; source msha-controller-operator-history
- **controller_controls_mine:** Tackett Robert L → #1; 1975-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Chrissy Coal Company Inc → #1; 1980-02-15 to 1985-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Tackett Robert L → Chrissy Coal Company Inc; 1980-02-15 to 1985-04-30; source msha-controller-operator-history
- **operator_operates_mine:** H & H Coal Company → #1; 1985-05-01 to 1985-08-08; source msha-controller-operator-history
- **controller_controls_mine:** Hall Kenneth E & Benny Hollifield → #1; 1985-05-01 to 1985-08-08; source msha-controller-operator-history
- **controller_controls_operator:** Hall Kenneth E & Benny Hollifield → H & H Coal Company; 1985-05-01 to 1985-08-08; source msha-controller-operator-history
- **operator_operates_mine:** Stardust Mining Company → #1; 1985-08-09 to 1987-07-13; source msha-controller-operator-history
- **controller_controls_mine:** Newsome Darling → #1; 1985-08-09 to 1987-07-13; source msha-controller-operator-history
- **controller_controls_operator:** Newsome Darling → Stardust Mining Company; 1985-08-09 to 1987-07-13; source msha-controller-operator-history
- **operator_operates_mine:** Upright Coal Inc → #1; 1987-07-14 to 1990-07-02; source msha-controller-operator-history
- **controller_controls_mine:** Feuchtenberger Doug → #1; 1987-07-14 to 1990-07-02; source msha-controller-operator-history
- **controller_controls_operator:** Feuchtenberger Doug → Upright Coal Inc; 1987-07-14 to 1990-07-02; source msha-controller-operator-history
- **operator_operates_mine:** D & M Coal Corp → #1; 1990-07-03 to 1990-07-11; source msha-controller-operator-history
- **controller_controls_mine:** Newsome Donald → #1; 1990-07-03 to 1990-07-11; source msha-controller-operator-history
- **controller_controls_operator:** Newsome Donald → D & M Coal Corp; 1990-07-03 to 1990-07-11; source msha-controller-operator-history
- **operator_operates_mine:** J B G Coal Corp → #1; 1990-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hamilton J Byron → #1; 1990-07-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hamilton J Byron → J B G Coal Corp; 1990-07-12 to current/open; source msha-controller-operator-history