# Relationship history for MSHA mine 4607245

Current hierarchy: **Livingston Charles R → Skyline Mining Corp → Smith Mine (Surface)**

- 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:** Livingston Charles R → Smith Mine (Surface); 1982-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Skyline Mining Corp → Smith Mine (Surface); 1986-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Livingston Charles R → Skyline Mining Corp; 1986-12-01 to current/open; source msha-controller-operator-history