# Relationship history for MSHA mine 4607749

Current hierarchy: **Dennis  Holbrook → Dandy Mining 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

- **controller_controls_mine:** Carey  Cline et al → No 4; 1988-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Silver River Coals Inc → No 4; 1989-08-01 to 1990-12-27; source msha-controller-operator-history
- **controller_controls_operator:** Carey  Cline et al → Silver River Coals Inc; 1989-08-01 to 1990-12-27; source msha-controller-operator-history
- **operator_operates_mine:** D A & H Coal Company Inc → No 4; 1990-12-28 to 1997-04-07; source msha-controller-operator-history
- **controller_controls_mine:** Hoosier Don → No 4; 1990-12-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hoosier Don → D A & H Coal Company Inc; 1990-12-28 to 1997-04-07; 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; 1997-04-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dennis  Holbrook → Dandy Mining Inc; 1997-04-08 to current/open; source msha-controller-operator-history