# Relationship history for MSHA mine 1516569

Current hierarchy: **Eddie  Lawson → Sunshine Coal Company Inc → No 1 Mine**

- 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

- **controller_controls_mine:** Trimble Brenda → No 1 Mine; 1977-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Thompson Benny → No 1 Mine; 1981-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Big Four Development Inc → No 1 Mine; 1989-02-01 to 1990-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Montgomery Morris Et Al → No 1 Mine; 1989-02-01 to 1990-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Montgomery Morris Et Al → Big Four Development Inc; 1989-02-01 to 1990-07-09; source msha-controller-operator-history
- **operator_operates_mine:** Hi Grade Mining Inc → No 1 Mine; 1990-07-10 to 1994-02-08; source msha-controller-operator-history
- **controller_controls_operator:** Trimble Brenda → Hi Grade Mining Inc; 1990-07-10 to 1994-02-08; source msha-controller-operator-history
- **operator_operates_mine:** T & T Kentucky Coal Company Inc → No 1 Mine; 1994-02-09 to 1994-06-12; source msha-controller-operator-history
- **controller_controls_operator:** Thompson Benny → T & T Kentucky Coal Company Inc; 1994-02-09 to 1994-06-12; source msha-controller-operator-history
- **operator_operates_mine:** Sunshine Coal Company Inc → No 1 Mine; 1994-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Eddie  Lawson → No 1 Mine; 1994-06-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eddie  Lawson → Sunshine Coal Company Inc; 1994-06-13 to current/open; source msha-controller-operator-history