# Relationship history for MSHA mine 0504405

Current hierarchy: **Lionelle Joe E → U S Soil → Lily Mine Portable**

- 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

- **controller_controls_mine:** Bill  Tezak et al → Lily Mine Portable; 1986-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Colorado Quarries Inc → Lily Mine Portable; 1989-08-01 to 1992-09-15; source msha-controller-operator-history
- **controller_controls_operator:** Bill  Tezak et al → Colorado Quarries Inc; 1989-08-01 to 1992-09-15; source msha-controller-operator-history
- **operator_operates_mine:** U S Soil → Lily Mine Portable; 1992-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lionelle Joe E → Lily Mine Portable; 1992-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lionelle Joe E → U S Soil; 1992-09-16 to current/open; source msha-controller-operator-history