# Relationship history for MSHA mine 5001812

Current hierarchy: **William  Eason → Earthwork, Inc. → Premier 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

- **operator_operates_mine:** Earthwork, Inc. → Premier 1; 2004-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William  Eason → Premier 1; 2004-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William  Eason → Earthwork, Inc.; 2004-08-17 to current/open; source msha-controller-operator-history