# Relationship history for MSHA mine 3901024

Current hierarchy: **Tom M  Sterzinger → Sterzinger Destruction Company → Skyview Pit & Mill**

- 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:** Myles Klosterman-Owner → Skyview Pit & Mill; 1950-01-01 to 1979-11-14; source msha-controller-operator-history
- **controller_controls_mine:** Myles Klosterman-Owner → Skyview Pit & Mill; 1950-01-01 to 1979-11-14; source msha-controller-operator-history
- **controller_controls_operator:** Myles Klosterman-Owner → Myles Klosterman-Owner; 1950-01-01 to 1979-11-14; source msha-controller-operator-history
- **operator_operates_mine:** Sterzinger Destruction Company → Skyview Pit & Mill; 1979-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Tom M  Sterzinger → Skyview Pit & Mill; 1979-11-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Tom M  Sterzinger → Sterzinger Destruction Company; 1979-11-15 to current/open; source msha-controller-operator-history