# Relationship history for MSHA mine 3004062

Current hierarchy: **Jordan D May; Amber M Hill → EARTH DEVELOPMENT → EARTH DEVELOPMENT**

- 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:** Earth Development → EARTH DEVELOPMENT; 2020-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Amber M Hill Et Al → EARTH DEVELOPMENT; 2020-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amber M Hill Et Al → Earth Development; 2020-10-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jordan D May  Et Al → Earth Development; 2020-10-05 to current/open; source msha-controller-operator-history