# Relationship history for MSHA mine 0501539

Current hierarchy: **Goodwin Walter → Goodrocks Mining Corp → John Paul Jones 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:** Goodrocks Mining Corp → John Paul Jones Mine; 1983-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Goodwin Walter → John Paul Jones Mine; 1983-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Goodwin Walter → Goodrocks Mining Corp; 1983-07-01 to current/open; source msha-controller-operator-history