# Relationship history for MSHA mine 1515591

Current hierarchy: **Fuson Ronnie → Mountain Coal Company → No 2**

- 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:** Fuson Junior S → No 2; 1984-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** 92 Mining Company → No 2; 1986-04-01 to 1986-05-27; source msha-controller-operator-history
- **controller_controls_operator:** Fuson Junior S → 92 Mining Company; 1986-04-01 to 1986-05-27; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Coal Company → No 2; 1986-05-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Fuson Ronnie → No 2; 1986-05-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Fuson Ronnie → Mountain Coal Company; 1986-05-28 to current/open; source msha-controller-operator-history