# Relationship history for MSHA mine 4607642

Current hierarchy: **Harold David → Dmc Equipment Company → 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:** Keene Walden → No 5; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Clinch Valley Coal Corp → No 5; 1989-01-01 to 1990-10-22; source msha-controller-operator-history
- **controller_controls_operator:** Keene Walden → Clinch Valley Coal Corp; 1989-01-01 to 1990-10-22; source msha-controller-operator-history
- **operator_operates_mine:** Clinch Valley Coal Corp → No 5; 1990-10-23 to 1994-05-01; source msha-controller-operator-history
- **controller_controls_mine:** Raymond  Cline → No 5; 1990-10-23 to 1994-05-01; source msha-controller-operator-history
- **controller_controls_operator:** Raymond  Cline → Clinch Valley Coal Corp; 1990-10-23 to 1994-05-01; source msha-controller-operator-history
- **operator_operates_mine:** Clinch Valley Coal Corp → No 5; 1994-05-02 to 1995-10-05; source msha-controller-operator-history
- **controller_controls_mine:** Richard F  Baugh → No 5; 1994-05-02 to 1995-10-05; source msha-controller-operator-history
- **controller_controls_operator:** Richard F  Baugh → Clinch Valley Coal Corp; 1994-05-02 to 1995-10-05; source msha-controller-operator-history
- **operator_operates_mine:** Dmc Equipment Company → No 5; 1995-10-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Harold David → No 5; 1995-10-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harold David → Dmc Equipment Company; 1995-10-06 to current/open; source msha-controller-operator-history