# Relationship history for MSHA mine 1512238

Current hierarchy: **Ronnie A  Edwards → Red Dog Coal Corp → No 4-A**

- 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:** Bartley Arnold J → No 4-A; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** O D Coal Company → No 4-A; 1980-02-01 to 1980-06-22; source msha-controller-operator-history
- **controller_controls_mine:** Mullins Estill--Otis Davis & Billy Joe Phillips → No 4-A; 1980-02-01 to 1980-06-22; source msha-controller-operator-history
- **controller_controls_operator:** Mullins Estill--Otis Davis & Billy Joe Phillips → O D Coal Company; 1980-02-01 to 1980-06-22; source msha-controller-operator-history
- **operator_operates_mine:** Mill Branch Mining Company Inc → No 4-A; 1980-06-23 to 1980-06-26; source msha-controller-operator-history
- **controller_controls_operator:** Bartley Arnold J → Mill Branch Mining Company Inc; 1980-06-23 to 1980-06-26; source msha-controller-operator-history
- **operator_operates_mine:** Coleman & Coleman Mining Company Inc → No 4-A; 1980-06-27 to 1981-07-23; source msha-controller-operator-history
- **controller_controls_mine:** Brent  Coleman et al → No 4-A; 1980-06-27 to 1981-07-23; source msha-controller-operator-history
- **controller_controls_operator:** Brent  Coleman et al → Coleman & Coleman Mining Company Inc; 1980-06-27 to 1981-07-23; source msha-controller-operator-history
- **operator_operates_mine:** M & E Coal Company → No 4-A; 1981-07-24 to 1983-05-12; source msha-controller-operator-history
- **controller_controls_mine:** Blankenship Mack → No 4-A; 1981-07-24 to 1983-05-12; source msha-controller-operator-history
- **controller_controls_operator:** Blankenship Mack → M & E Coal Company; 1981-07-24 to 1983-05-12; source msha-controller-operator-history
- **controller_controls_mine:** Ronnie A  Edwards → No 4-A; 1982-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ken-Cole Coal Corp → No 4-A; 1983-05-13 to 1987-02-04; source msha-controller-operator-history
- **controller_controls_mine:** Coleman Dennis S & Shannon → No 4-A; 1983-05-13 to 1987-02-04; source msha-controller-operator-history
- **controller_controls_operator:** Coleman Dennis S & Shannon → Ken-Cole Coal Corp; 1983-05-13 to 1987-02-04; source msha-controller-operator-history
- **operator_operates_mine:** Red Dog Coal Corp → No 4-A; 1987-02-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronnie A  Edwards → Red Dog Coal Corp; 1987-02-05 to current/open; source msha-controller-operator-history