# Relationship history for MSHA mine 4801129

Current hierarchy: **State Of Wyoming → State Of Wyoming → Western Farms 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:** Lamb Construction Company → Western Farms Pit; 1950-01-01 to 1980-04-18; source msha-controller-operator-history
- **controller_controls_mine:** Lamb Larry N → Western Farms Pit; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lamb Larry N → Lamb Construction Company; 1950-01-01 to 1980-04-18; source msha-controller-operator-history
- **operator_operates_mine:** State Of Wyoming → Western Farms Pit; 1980-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** State Of Wyoming → Western Farms Pit; 1980-04-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** State Of Wyoming → State Of Wyoming; 1980-04-19 to current/open; source msha-controller-operator-history