# Relationship history for MSHA mine 4604953

Current hierarchy: **Grimmett Judy → J & H Leasing Company Inc → No 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:** Huntsman Coal Corp → No 1; 1975-06-01 to 1977-04-07; source msha-controller-operator-history
- **controller_controls_mine:** Christianson Todd → No 1; 1975-06-01 to 1977-04-07; source msha-controller-operator-history
- **controller_controls_operator:** Christianson Todd → Huntsman Coal Corp; 1975-06-01 to 1977-04-07; source msha-controller-operator-history
- **operator_operates_mine:** Coal-X Inc → No 1; 1977-04-08 to 1985-10-07; source msha-controller-operator-history
- **controller_controls_mine:** Gulf Energy Corp → No 1; 1977-04-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gulf Energy Corp → Coal-X Inc; 1977-04-08 to 1985-10-07; source msha-controller-operator-history
- **operator_operates_mine:** C D & M Mining Inc → No 1; 1985-10-08 to 1988-01-19; source msha-controller-operator-history
- **controller_controls_mine:** Clay Michael → No 1; 1985-10-08 to 1988-01-19; source msha-controller-operator-history
- **controller_controls_operator:** Clay Michael → C D & M Mining Inc; 1985-10-08 to 1988-01-19; source msha-controller-operator-history
- **operator_operates_mine:** Rej Resources Inc → No 1; 1988-01-20 to 1988-12-22; source msha-controller-operator-history
- **controller_controls_mine:** Mullins Ronald → No 1; 1988-01-20 to 1988-12-22; source msha-controller-operator-history
- **controller_controls_operator:** Mullins Ronald → Rej Resources Inc; 1988-01-20 to 1988-12-22; source msha-controller-operator-history
- **controller_controls_mine:** Grimmett Judy → No 1; 1988-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** R E J O Inc → No 1; 1988-12-23 to 1989-04-23; source msha-controller-operator-history
- **controller_controls_mine:** Workman Opal → No 1; 1988-12-23 to 1989-04-23; source msha-controller-operator-history
- **controller_controls_operator:** Workman Opal → R E J O Inc; 1988-12-23 to 1989-04-23; source msha-controller-operator-history
- **operator_operates_mine:** J & H Leasing Company Inc → No 1; 1989-04-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Grimmett Judy → J & H Leasing Company Inc; 1989-04-24 to current/open; source msha-controller-operator-history