# Relationship history for MSHA mine 4102467

Current hierarchy: **Kelly L Zbranek → Zbranek Gravel LLC → Zbranek 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

- **operator_operates_mine:** Zbranek Brothers → Zbranek Pit; 1950-01-01 to 1999-01-05; source msha-controller-operator-history
- **controller_controls_mine:** Clarence  Zbranek et al → Zbranek Pit; 1950-01-01 to 1999-01-05; source msha-controller-operator-history
- **controller_controls_operator:** Clarence  Zbranek et al → Zbranek Brothers; 1950-01-01 to 1999-01-05; source msha-controller-operator-history
- **operator_operates_mine:** Zbranek Gravel LLC → Zbranek Pit; 1999-01-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alan  Zbranek → Zbranek Pit; 1999-01-06 to 2026-06-21; source msha-controller-operator-history
- **controller_controls_operator:** Alan  Zbranek → Zbranek Gravel LLC; 1999-01-06 to 2026-06-21; source msha-controller-operator-history
- **controller_controls_mine:** Kelly L Zbranek → Zbranek Pit; 2026-06-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kelly L Zbranek → Zbranek Gravel LLC; 2026-06-22 to current/open; source msha-controller-operator-history