# Relationship history for MSHA mine 4604519

Current hierarchy: **Frazier Robert B → Kris Energy Inc → Mine No 3**

- 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:** Ken Coal Company Inc → Mine No 3; 1974-12-15 to 1991-07-01; source msha-controller-operator-history
- **controller_controls_mine:** Lester Kenneth → Mine No 3; 1974-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lester Kenneth → Ken Coal Company Inc; 1974-12-15 to 1991-07-01; source msha-controller-operator-history
- **controller_controls_mine:** Larry  Phillips → Mine No 3; 1987-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Frazier Robert B → Mine No 3; 1989-09-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Twin Oaks Mining Inc → Mine No 3; 1991-07-02 to 1992-01-26; source msha-controller-operator-history
- **controller_controls_mine:** Smith Robert Jr → Mine No 3; 1991-07-02 to 1992-01-26; source msha-controller-operator-history
- **controller_controls_operator:** Smith Robert Jr → Twin Oaks Mining Inc; 1991-07-02 to 1992-01-26; source msha-controller-operator-history
- **operator_operates_mine:** Twin Oaks Mining Inc → Mine No 3; 1992-01-27 to 1992-09-22; source msha-controller-operator-history
- **controller_controls_mine:** Sharon  Preece et al → Mine No 3; 1992-01-27 to 1992-09-22; source msha-controller-operator-history
- **controller_controls_operator:** Sharon  Preece et al → Twin Oaks Mining Inc; 1992-01-27 to 1992-09-22; source msha-controller-operator-history
- **operator_operates_mine:** Mouthcard Development Company Inc → Mine No 3; 1992-09-23 to 1992-10-15; source msha-controller-operator-history
- **controller_controls_operator:** Larry  Phillips → Mouthcard Development Company Inc; 1992-09-23 to 1992-10-15; source msha-controller-operator-history
- **operator_operates_mine:** Kris Energy Inc → Mine No 3; 1992-10-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Frazier Robert B → Kris Energy Inc; 1992-10-16 to current/open; source msha-controller-operator-history