# Relationship history for MSHA mine 4002346

Current hierarchy: **Asbury Charles M → Key Mining Inc → #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:** Hard Times Coal Company → #1; 1977-11-01 to 1978-06-11; source msha-controller-operator-history
- **controller_controls_mine:** Goans Johnny → #1; 1977-11-01 to 1978-06-11; source msha-controller-operator-history
- **controller_controls_operator:** Goans Johnny → Hard Times Coal Company; 1977-11-01 to 1978-06-11; source msha-controller-operator-history
- **operator_operates_mine:** Associated Mining Inc → #1; 1978-06-12 to 1980-02-18; source msha-controller-operator-history
- **controller_controls_mine:** Stringfield Charlie → #1; 1978-06-12 to 1980-02-18; source msha-controller-operator-history
- **controller_controls_operator:** Stringfield Charlie → Associated Mining Inc; 1978-06-12 to 1980-02-18; source msha-controller-operator-history
- **operator_operates_mine:** J & P Coal Company Inc → #1; 1980-02-19 to 1982-03-18; source msha-controller-operator-history
- **controller_controls_mine:** Johnson John H Et Al → #1; 1980-02-19 to 1982-03-18; source msha-controller-operator-history
- **controller_controls_operator:** Johnson John H Et Al → J & P Coal Company Inc; 1980-02-19 to 1982-03-18; source msha-controller-operator-history
- **controller_controls_mine:** Russell William → #1; 1982-01-04 to 1990-12-02; source msha-controller-operator-history
- **operator_operates_mine:** Comstock Coal Company Inc → #1; 1982-03-19 to 1990-12-02; source msha-controller-operator-history
- **controller_controls_operator:** Russell William → Comstock Coal Company Inc; 1982-03-19 to 1990-12-02; source msha-controller-operator-history
- **controller_controls_mine:** Roger E  West → #1; 1989-06-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Stoney Ridge Coal Company Inc → #1; 1990-12-03 to 1991-06-16; source msha-controller-operator-history
- **controller_controls_operator:** Roger E  West → Stoney Ridge Coal Company Inc; 1990-12-03 to 1991-06-16; source msha-controller-operator-history
- **operator_operates_mine:** Key Mining Inc → #1; 1991-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Asbury Charles M → #1; 1991-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Asbury Charles M → Key Mining Inc; 1991-06-17 to current/open; source msha-controller-operator-history