# Relationship history for MSHA mine 1000062

Current hierarchy: **Nez Perce Indian Tribe → Nez Perce Tribal Enterprise System → Mission Creek Limestone**

- 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:** De Atley Company Inc → Mission Creek Limestone; 1950-01-01 to 1984-09-27; source msha-controller-operator-history
- **controller_controls_mine:** Eucon Corporation → Mission Creek Limestone; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Eucon Corporation → De Atley Company Inc; 1950-01-01 to 1984-09-27; source msha-controller-operator-history
- **operator_operates_mine:** Nez Perce Tribal Enterprise System → Mission Creek Limestone; 1984-09-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nez Perce Indian Tribe → Mission Creek Limestone; 1984-09-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nez Perce Indian Tribe → Nez Perce Tribal Enterprise System; 1984-09-28 to current/open; source msha-controller-operator-history