# Relationship history for MSHA mine 0103520

Current hierarchy: **Max  Martinez → Max Martinez → Martinez Pit**

- 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:** David Martinez → Martinez Pit; 2018-05-10 to 2019-12-01; source msha-controller-operator-history
- **controller_controls_mine:** David  Martinez Contreras → Martinez Pit; 2018-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David  Martinez Contreras → David Martinez; 2018-05-10 to 2019-12-01; source msha-controller-operator-history
- **operator_operates_mine:** Max Martinez → Martinez Pit; 2019-12-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Max  Martinez → Martinez Pit; 2019-12-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Max  Martinez → Max Martinez; 2019-12-02 to current/open; source msha-controller-operator-history