# Relationship history for MSHA mine 4607397

Current hierarchy: **Eddie  Cline → Thunder Bay Inc → No 4**

- 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:** Golden Eagle Coals Inc → No 4; 1987-11-01 to 1990-12-27; source msha-controller-operator-history
- **controller_controls_mine:** Carey  Cline et al → No 4; 1987-11-01 to 1990-12-27; source msha-controller-operator-history
- **controller_controls_operator:** Carey  Cline et al → Golden Eagle Coals Inc; 1987-11-01 to 1990-12-27; source msha-controller-operator-history
- **controller_controls_mine:** Thurman C  Cline → No 4; 1989-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Black Bear Mining Inc → No 4; 1990-12-28 to 1997-02-10; source msha-controller-operator-history
- **controller_controls_operator:** Thurman C  Cline → Black Bear Mining Inc; 1990-12-28 to 1997-02-10; source msha-controller-operator-history
- **controller_controls_mine:** Dennis  Holbrook → No 4; 1996-11-12 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dandy Mining Inc → No 4; 1997-02-11 to 1999-09-06; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Holbrook → Dandy Mining Inc; 1997-02-11 to 1999-09-06; source msha-controller-operator-history
- **controller_controls_mine:** Eddie  Cline → No 4; 1998-01-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Thunder Bay Inc → No 4; 1999-09-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eddie  Cline → Thunder Bay Inc; 1999-09-07 to current/open; source msha-controller-operator-history