# Relationship history for MSHA mine 4604317

Current hierarchy: **Monk Bill → Monk Mining Corp → Mine No 2**

- 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:** Carroll Preston W → Mine No 2; 1950-01-01 to 1977-01-05; source msha-controller-operator-history
- **operator_operates_mine:** Wyoming Coal Mining Company → Mine No 2; 1974-09-02 to 1976-10-13; source msha-controller-operator-history
- **controller_controls_operator:** Carroll Preston W → Wyoming Coal Mining Company; 1974-09-02 to 1976-10-13; source msha-controller-operator-history
- **operator_operates_mine:** Wyoming Coal Mining Company → Mine No 2; 1976-10-14 to 1977-07-05; source msha-controller-operator-history
- **controller_controls_mine:** Walls Grace → Mine No 2; 1976-10-14 to 1977-07-05; source msha-controller-operator-history
- **controller_controls_operator:** Walls Grace → Wyoming Coal Mining Company; 1976-10-14 to 1977-07-05; source msha-controller-operator-history
- **operator_operates_mine:** Wyoming Coal Mining Company Inc → Mine No 2; 1977-07-06 to 1981-06-16; source msha-controller-operator-history
- **controller_controls_mine:** Mullins White Jr → Mine No 2; 1977-07-06 to 1981-06-16; source msha-controller-operator-history
- **controller_controls_operator:** Mullins White Jr → Wyoming Coal Mining Company Inc; 1977-07-06 to 1981-06-16; source msha-controller-operator-history
- **operator_operates_mine:** C L & S Coal Company Inc → Mine No 2; 1981-06-17 to 1986-05-09; source msha-controller-operator-history
- **controller_controls_mine:** Salyers Don → Mine No 2; 1981-06-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Salyers Don → C L & S Coal Company Inc; 1981-06-17 to 1986-05-09; source msha-controller-operator-history
- **operator_operates_mine:** Double J & B Coal Corp → Mine No 2; 1986-05-10 to 1987-02-16; source msha-controller-operator-history
- **controller_controls_mine:** Daugherty Randall → Mine No 2; 1986-05-10 to 1987-02-16; source msha-controller-operator-history
- **controller_controls_operator:** Daugherty Randall → Double J & B Coal Corp; 1986-05-10 to 1987-02-16; source msha-controller-operator-history
- **controller_controls_mine:** Monk Bill → Mine No 2; 1986-06-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Monk Mining Corp → Mine No 2; 1987-02-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Monk Bill → Monk Mining Corp; 1987-02-17 to current/open; source msha-controller-operator-history