# Relationship history for MSHA mine 4608646

Current hierarchy: **David  Cline → Rock N Roll Coal Company Inc → Mine 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:** David  Cline → Mine No 3; 1995-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kenneth  Robinette → Mine No 3; 1997-02-25 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tear Drop Mining Inc → Mine No 3; 1997-06-01 to 1997-07-28; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth  Robinette → Tear Drop Mining Inc; 1997-06-01 to 1997-07-28; source msha-controller-operator-history
- **operator_operates_mine:** Rock N Roll Coal Company Inc → Mine No 3; 1997-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Cline → Rock N Roll Coal Company Inc; 1997-07-29 to current/open; source msha-controller-operator-history