# Relationship history for MSHA mine 1513922

Current hierarchy: **Clark Colin C → D C Coal Company → 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Elliott Branch Mining Company Inc → No 2; 1983-02-01 to 1983-08-25; source msha-controller-operator-history
- **controller_controls_mine:** Catsman Philip L → No 2; 1983-02-01 to 1983-08-25; source msha-controller-operator-history
- **controller_controls_operator:** Catsman Philip L → Elliott Branch Mining Company Inc; 1983-02-01 to 1983-08-25; source msha-controller-operator-history
- **operator_operates_mine:** D C Coal Company → No 2; 1983-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Clark Colin C Et Al → No 2; 1983-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clark Colin C Et Al → D C Coal Company; 1983-08-26 to current/open; source msha-controller-operator-history