# Relationship history for MSHA mine 1508002

Current hierarchy: **Smith Harry & Jamey → C & S Coal Co → 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:** Smith Harry & Jamey → No 5; 1974-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** C & S Coal Co → No 5; 1975-01-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Smith Harry & Jamey → C & S Coal Co; 1975-01-21 to current/open; source msha-controller-operator-history