# Relationship history for MSHA mine 4002146

Current hierarchy: **Sailors Don → Mountain Creek Mining Company Inc → Mountain Creek Mine No 4**

- 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

- **operator_operates_mine:** Shu-Ter Mining Company → Mountain Creek Mine No 4; 1976-11-01 to 1978-06-11; source msha-controller-operator-history
- **controller_controls_mine:** Mishpacha Power Company → Mountain Creek Mine No 4; 1976-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mishpacha Power Company → Shu-Ter Mining Company; 1976-11-01 to 1978-06-11; source msha-controller-operator-history
- **controller_controls_mine:** Sailors Don → Mountain Creek Mine No 4; 1977-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Creek Mining Company Inc → Mountain Creek Mine No 4; 1978-06-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sailors Don → Mountain Creek Mining Company Inc; 1978-06-12 to current/open; source msha-controller-operator-history