# Relationship history for MSHA mine 1516717

Current hierarchy: **Jill  Slone → Gun Hill Coal Inc → Gun Hill No 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

- **controller_controls_mine:** Willie  Blankenship → Gun Hill No 3; 1977-03-04 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** F & B Coal Inc → Gun Hill No 3; 1989-09-01 to 1992-12-22; source msha-controller-operator-history
- **controller_controls_operator:** Willie  Blankenship → F & B Coal Inc; 1989-09-01 to 1992-12-22; source msha-controller-operator-history
- **operator_operates_mine:** J & S Coal Inc → Gun Hill No 3; 1992-12-23 to 2000-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Billiter Michael → Gun Hill No 3; 1992-12-23 to 2000-05-14; source msha-controller-operator-history
- **controller_controls_operator:** Billiter Michael → J & S Coal Inc; 1992-12-23 to 2000-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Jill  Slone → Gun Hill No 3; 1998-08-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** N D O Coal Company Inc → Gun Hill No 3; 2000-05-15 to 2001-02-28; source msha-controller-operator-history
- **controller_controls_mine:** Rex Dean  Osborn → Gun Hill No 3; 2000-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rex Dean  Osborn → N D O Coal Company Inc; 2000-05-15 to 2001-02-28; source msha-controller-operator-history
- **operator_operates_mine:** Gun Hill Coal Inc → Gun Hill No 3; 2001-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jill  Slone → Gun Hill Coal Inc; 2001-03-01 to current/open; source msha-controller-operator-history