# Relationship history for MSHA mine 4607567

Current hierarchy: **Mark P  White → Niko Mining Inc → No 66**

- 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:** Charles Douglas  Bailey → No 66; 1987-09-29 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mc Mason Coals Inc → No 66; 1988-09-01 to 1989-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Mack  Lester → No 66; 1988-09-01 to 1989-01-02; source msha-controller-operator-history
- **controller_controls_operator:** Mack  Lester → Mc Mason Coals Inc; 1988-09-01 to 1989-01-02; source msha-controller-operator-history
- **operator_operates_mine:** Bailey Energy Inc → No 66; 1989-01-03 to 1990-07-30; source msha-controller-operator-history
- **controller_controls_operator:** Charles Douglas  Bailey → Bailey Energy Inc; 1989-01-03 to 1990-07-30; source msha-controller-operator-history
- **operator_operates_mine:** Bailey Energy Inc → No 66; 1990-07-31 to 1994-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Kennie Ray  Childers → No 66; 1990-07-31 to 1994-07-14; source msha-controller-operator-history
- **controller_controls_operator:** Kennie Ray  Childers → Bailey Energy Inc; 1990-07-31 to 1994-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Thomas J  Lockhart → No 66; 1992-11-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** 16 Tons Coal Company Inc → No 66; 1994-07-15 to 1994-09-20; source msha-controller-operator-history
- **controller_controls_operator:** Thomas J  Lockhart → 16 Tons Coal Company Inc; 1994-07-15 to 1994-09-20; source msha-controller-operator-history
- **operator_operates_mine:** Clearwater Mining Inc → No 66; 1994-09-21 to 1994-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Donna  Jeffrey → No 66; 1994-09-21 to 1994-11-30; source msha-controller-operator-history
- **controller_controls_operator:** Donna  Jeffrey → Clearwater Mining Inc; 1994-09-21 to 1994-11-30; source msha-controller-operator-history
- **operator_operates_mine:** Clearwater Mining Inc → No 66; 1994-12-01 to 1995-08-13; source msha-controller-operator-history
- **controller_controls_mine:** Freeman  Lambert → No 66; 1994-12-01 to 1995-08-13; source msha-controller-operator-history
- **controller_controls_operator:** Freeman  Lambert → Clearwater Mining Inc; 1994-12-01 to 1995-08-13; source msha-controller-operator-history
- **operator_operates_mine:** Puma Coal Company Inc → No 66; 1995-08-14 to 1999-04-18; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth J  Bailey → No 66; 1995-08-14 to 1999-04-18; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth J  Bailey → Puma Coal Company Inc; 1995-08-14 to 1999-04-18; source msha-controller-operator-history
- **operator_operates_mine:** Niko Mining Inc → No 66; 1999-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark P  White → No 66; 1999-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark P  White → Niko Mining Inc; 1999-04-19 to current/open; source msha-controller-operator-history