# Relationship history for MSHA mine 4001746

Current hierarchy: **Asbury Charles M → Key Mining Inc → #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:** Riverfront Coal Corp → #3; 1975-04-17 to 1977-02-10; source msha-controller-operator-history
- **controller_controls_mine:** Seiber Donald C & Freamon Bunch → #3; 1975-04-17 to 1977-02-10; source msha-controller-operator-history
- **controller_controls_operator:** Seiber Donald C & Freamon Bunch → Riverfront Coal Corp; 1975-04-17 to 1977-02-10; source msha-controller-operator-history
- **controller_controls_mine:** Roger E  West → #3; 1976-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Rosedale Mining Company Inc → #3; 1977-02-11 to 1978-11-05; source msha-controller-operator-history
- **controller_controls_mine:** Goodman Wayne → #3; 1977-02-11 to 1978-11-05; source msha-controller-operator-history
- **controller_controls_operator:** Goodman Wayne → Rosedale Mining Company Inc; 1977-02-11 to 1978-11-05; source msha-controller-operator-history
- **operator_operates_mine:** Round Mountain Coal Company Inc → #3; 1978-11-06 to 1991-06-16; source msha-controller-operator-history
- **controller_controls_operator:** Roger E  West → Round Mountain Coal Company Inc; 1978-11-06 to 1991-06-16; source msha-controller-operator-history
- **operator_operates_mine:** Key Mining Inc → #3; 1991-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Asbury Charles M → #3; 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