# Relationship history for MSHA mine 4608687

Current hierarchy: **Clarence R  Peters; Richard N  Nester → Laurel Coal Corp → Spruce Lick**

- 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:** Ashland Inc et al → Spruce Lick; 1977-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roger  Bell → Spruce Lick; 1994-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hobet Mining Inc → Spruce Lick; 1998-01-01 to 1998-01-26; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc et al → Hobet Mining Inc; 1998-01-01 to 1998-01-26; source msha-controller-operator-history
- **operator_operates_mine:** Bar-K Inc → Spruce Lick; 1998-01-27 to 1998-09-14; source msha-controller-operator-history
- **controller_controls_operator:** Roger  Bell → Bar-K Inc; 1998-01-27 to 1998-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Laurel Coal Corp → Spruce Lick; 1998-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard N  Nester et al → Spruce Lick; 1998-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard N  Nester et al → Laurel Coal Corp; 1998-09-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clarence R  Peters et al → Laurel Coal Corp; 1998-09-15 to current/open; source msha-controller-operator-history