# Relationship history for MSHA mine 5001327

Current hierarchy: **Nugget Estate Mining Company (Nemco) → Nugget Estate Mining Company (Nemco) → Nugget Estate 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Nugget Estate Mining Company (Nemco) → Nugget Estate Mine; 1980-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Nugget Estate Mining Company (Nemco) → Nugget Estate Mine; 1980-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nugget Estate Mining Company (Nemco) → Nugget Estate Mining Company (Nemco); 1980-05-01 to current/open; source msha-controller-operator-history