# Relationship history for MSHA mine 4607357

Current hierarchy: **Garretson Roy → Mercy Leasing Company Inc → Mine No 5**

- 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:** Click Cecil & Larry M Leffew → Mine No 5; 1977-01-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** W D Mining Inc → Mine No 5; 1987-09-01 to 1988-07-19; source msha-controller-operator-history
- **controller_controls_mine:** Monk Bill → Mine No 5; 1987-09-01 to 1988-07-19; source msha-controller-operator-history
- **controller_controls_operator:** Monk Bill → W D Mining Inc; 1987-09-01 to 1988-07-19; source msha-controller-operator-history
- **controller_controls_mine:** Spencer William Et Al → Mine No 5; 1987-11-23 to 1989-01-23; source msha-controller-operator-history
- **operator_operates_mine:** Click & Leffew Coal Company Inc → Mine No 5; 1988-07-20 to 1988-12-18; source msha-controller-operator-history
- **controller_controls_operator:** Click Cecil & Larry M Leffew → Click & Leffew Coal Company Inc; 1988-07-20 to 1988-12-18; source msha-controller-operator-history
- **operator_operates_mine:** Favor Coal Company Inc → Mine No 5; 1988-12-19 to 1988-12-27; source msha-controller-operator-history
- **controller_controls_operator:** Spencer William Et Al → Favor Coal Company Inc; 1988-12-19 to 1988-12-27; source msha-controller-operator-history
- **operator_operates_mine:** Mercy Leasing Company Inc → Mine No 5; 1988-12-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Garretson Roy → Mine No 5; 1988-12-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Garretson Roy → Mercy Leasing Company Inc; 1988-12-28 to current/open; source msha-controller-operator-history