# Relationship history for MSHA mine 4102554

Current hierarchy: **Ronald E  Steinhauser → Steinhauser Clay Company → Milwhite 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** E A Holly Company → Milwhite Pit; 1950-01-01 to 1979-09-12; source msha-controller-operator-history
- **controller_controls_mine:** Holly E A → Milwhite Pit; 1950-01-01 to 1979-09-12; source msha-controller-operator-history
- **controller_controls_operator:** Holly E A → E A Holly Company; 1950-01-01 to 1979-09-12; source msha-controller-operator-history
- **operator_operates_mine:** Steinhauser Clay Company → Milwhite Pit; 1979-09-13 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ronald E  Steinhauser → Milwhite Pit; 1979-09-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ronald E  Steinhauser → Steinhauser Clay Company; 1979-09-13 to current/open; source msha-controller-operator-history