# Relationship history for MSHA mine 4608317

Current hierarchy: **Goodwin Barry K → Mountain Minerals Inc → Milburn No 1**

- 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

- **controller_controls_mine:** Goodwin Barry K → Milburn No 1; 1990-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Man Power Inc → Milburn No 1; 1993-06-01 to 1993-12-12; source msha-controller-operator-history
- **controller_controls_mine:** Thompson Randolph → Milburn No 1; 1993-06-01 to 1993-12-12; source msha-controller-operator-history
- **controller_controls_operator:** Thompson Randolph → Man Power Inc; 1993-06-01 to 1993-12-12; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Minerals Inc → Milburn No 1; 1993-12-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Goodwin Barry K → Mountain Minerals Inc; 1993-12-13 to current/open; source msha-controller-operator-history