# Relationship history for MSHA mine 6900015

Current hierarchy: **Joaquin Muna  Manglona → Resources Management International Corporation → RMIC Quarry Saipan**

- 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:** Resources Management International Corporation → RMIC Quarry Saipan; 2026-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joaquin Muna  Manglona → RMIC Quarry Saipan; 2026-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joaquin Muna  Manglona → Resources Management International Corporation; 2026-02-19 to current/open; source msha-controller-operator-history