# Relationship history for MSHA mine 4503595

Current hierarchy: **Mike W  Naff → Kettle Falls Shale Company → Drive Inn Pit**

- 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:** Mike W  Naff → Drive Inn Pit; 2004-11-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Kettle Falls Shale Company → Drive Inn Pit; 2006-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mike W  Naff → Kettle Falls Shale Company; 2006-02-28 to current/open; source msha-controller-operator-history