# Relationship history for MSHA mine 4607878

Current hierarchy: **Smith Glen A & Jerry K Lester → Hard Luck Mining Inc → Mine 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:** Coal Power Corp → Mine No 1; 1990-04-01 to 1992-03-12; source msha-controller-operator-history
- **controller_controls_mine:** Wilcher Geoffrey S → Mine No 1; 1990-04-01 to 1993-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Wilcher Geoffrey S → Coal Power Corp; 1990-04-01 to 1992-03-12; source msha-controller-operator-history
- **operator_operates_mine:** E & G Mining Corp → Mine No 1; 1992-03-13 to 1992-11-11; source msha-controller-operator-history
- **controller_controls_mine:** Deel Ernie → Mine No 1; 1992-03-13 to 1992-11-11; source msha-controller-operator-history
- **controller_controls_operator:** Deel Ernie → E & G Mining Corp; 1992-03-13 to 1992-11-11; source msha-controller-operator-history
- **operator_operates_mine:** 16 Tons Coal Company Inc → Mine No 1; 1992-11-12 to 1994-03-01; source msha-controller-operator-history
- **controller_controls_mine:** Thomas J  Lockhart → Mine No 1; 1992-11-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas J  Lockhart → 16 Tons Coal Company Inc; 1992-11-12 to 1994-03-01; source msha-controller-operator-history
- **operator_operates_mine:** W E Industries Inc → Mine No 1; 1994-03-02 to 1995-10-01; source msha-controller-operator-history
- **controller_controls_mine:** Meadows Archie → Mine No 1; 1994-03-02 to 1995-10-01; source msha-controller-operator-history
- **controller_controls_operator:** Meadows Archie → W E Industries Inc; 1994-03-02 to 1995-10-01; source msha-controller-operator-history
- **operator_operates_mine:** Hard Luck Mining Inc → Mine No 1; 1995-10-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Smith Glen A & Jerry K Lester → Mine No 1; 1995-10-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Smith Glen A & Jerry K Lester → Hard Luck Mining Inc; 1995-10-02 to current/open; source msha-controller-operator-history