# Relationship history for MSHA mine 3610223

Current hierarchy: **Jose L  Mayllazhungo; Darwin G  Coyago → Luis Nugra Stones → Darwin Coyago**

- 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:** Luis Nugra Stones → Darwin Coyago; 2017-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Darwin G  Coyago et al → Darwin Coyago; 2017-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darwin G  Coyago et al → Luis Nugra Stones; 2017-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jose L  Mayllazhungo et al → Luis Nugra Stones; 2017-11-15 to current/open; source msha-controller-operator-history