# Relationship history for MSHA mine 1514841

Current hierarchy: **Bowling Edward → Service Contractors Inc → No 1 Strip**

- 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:** Clear Carl → No 1 Strip; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Carl Clear Coal Corp → No 1 Strip; 1984-09-01 to 1985-04-07; source msha-controller-operator-history
- **controller_controls_operator:** Clear Carl → Carl Clear Coal Corp; 1984-09-01 to 1985-04-07; source msha-controller-operator-history
- **operator_operates_mine:** Service Contractors Inc → No 1 Strip; 1985-04-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bowling Edward → No 1 Strip; 1985-04-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bowling Edward → Service Contractors Inc; 1985-04-08 to current/open; source msha-controller-operator-history