# Relationship history for MSHA mine 4602296

Current hierarchy: **Charles  Adkins → West Virginia-Tennessee Coal Sales Inc → Alpheus Preparation Plant**

- 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:** United States Steel Mining Company Inc → Alpheus Preparation Plant; 1950-01-01 to 1989-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Usx Corp → Alpheus Preparation Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Usx Corp → United States Steel Mining Company Inc; 1950-01-01 to 1989-06-18; source msha-controller-operator-history
- **operator_operates_mine:** West Virginia-Tennessee Coal Sales Inc → Alpheus Preparation Plant; 1989-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Charles  Adkins → Alpheus Preparation Plant; 1989-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Adkins → West Virginia-Tennessee Coal Sales Inc; 1989-06-19 to current/open; source msha-controller-operator-history