# Relationship history for MSHA mine 4003644

Current hierarchy: **Noel Omar Lopez Chavez → Lopez Stone → Macedonia 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:** Lopez Stone → Macedonia Mine; 2025-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Noel Omar Lopez Chavez → Macedonia Mine; 2025-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Noel Omar Lopez Chavez → Lopez Stone; 2025-11-18 to current/open; source msha-controller-operator-history