# Relationship history for MSHA mine 1513735

Current hierarchy: **Bowling Charles D → Crystal Star Coal Company Inc → No 3 (D)**

- 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:** Bowling Charles D Et Al → No 3 (D); 1978-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Crystal Star Coal Company Inc → No 3 (D); 1982-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bowling Charles D Et Al → Crystal Star Coal Company Inc; 1982-09-01 to current/open; source msha-controller-operator-history