# Relationship history for MSHA mine 0101792

Current hierarchy: **Budweg Carl → Budweg Enterprises → Liberty Hill Pits**

- 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:** Budweg Carl → Liberty Hill Pits; 1977-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Budweg Enterprises → Liberty Hill Pits; 1977-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Budweg Carl → Budweg Enterprises; 1977-09-01 to current/open; source msha-controller-operator-history