# Relationship history for MSHA mine 1514717

Current hierarchy: **Mc Lain Norman → Lindsay Coal Company 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Mc Lain Norman → No 1 Mine; 1983-08-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lindsay Coal Company Inc → No 1 Mine; 1984-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Lain Norman → Lindsay Coal Company Inc; 1984-07-01 to current/open; source msha-controller-operator-history