# Relationship history for MSHA mine 4608392

Current hierarchy: **Amon L  Mahon → Island Fork Construction Ltd → Mine No 31**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Red Hawk Mining Inc → Mine No 31; 1994-03-01 to 1998-07-27; source msha-controller-operator-history
- **controller_controls_mine:** Charles H  Powell → Mine No 31; 1994-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles H  Powell → Red Hawk Mining Inc; 1994-03-01 to 1998-07-27; source msha-controller-operator-history
- **controller_controls_mine:** Amon L  Mahon → Mine No 31; 1994-11-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Island Fork Construction Ltd → Mine No 31; 1998-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Amon L  Mahon → Island Fork Construction Ltd; 1998-07-28 to current/open; source msha-controller-operator-history