# Relationship history for MSHA mine 2602393

Current hierarchy: **Hugh Roy  Marshall → Ione Gold Llc → IONE MINE (AKA NEVADA MERCURY)**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Ione Gold Llc → IONE MINE (AKA NEVADA MERCURY); 1999-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hugh Roy  Marshall → IONE MINE (AKA NEVADA MERCURY); 1999-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hugh Roy  Marshall → Ione Gold Llc; 1999-09-01 to current/open; source msha-controller-operator-history