# Relationship history for MSHA mine 1514905

Current hierarchy: **Smith George W → Quill Mining Inc → No 1 Mine**

- 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:** C I Coal Company Inc → No 1 Mine; 1984-10-01 to 1985-10-31; source msha-controller-operator-history
- **controller_controls_mine:** Collett Lucky → No 1 Mine; 1984-10-01 to 1985-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Collett Lucky → C I Coal Company Inc; 1984-10-01 to 1985-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Quill Mining Inc → No 1 Mine; 1985-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Smith George W → No 1 Mine; 1985-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Smith George W → Quill Mining Inc; 1985-11-01 to current/open; source msha-controller-operator-history