# Relationship history for MSHA mine 1515269

Current hierarchy: **Clark  Johnson → C & C Mining Inc → No 2**

- 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:** Dema Coal Company Inc → No 2; 1985-07-01 to 1993-12-06; source msha-controller-operator-history
- **controller_controls_mine:** Carl R  Johnson et al → No 2; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl R  Johnson et al → Dema Coal Company Inc; 1985-07-01 to 1993-12-06; source msha-controller-operator-history
- **controller_controls_mine:** Clark  Johnson → No 2; 1993-08-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C & C Mining Inc → No 2; 1993-12-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clark  Johnson → C & C Mining Inc; 1993-12-07 to current/open; source msha-controller-operator-history