# Relationship history for MSHA mine 3002805

Current hierarchy: **James D  Uhlinger Sr → Champion Sand & Gravel Inc → Plant 2**

- 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:** Escudero Construction → Plant 2; 1987-08-01 to 1992-12-01; source msha-controller-operator-history
- **controller_controls_mine:** Escudero Joseph A → Plant 2; 1987-08-01 to 1992-12-01; source msha-controller-operator-history
- **controller_controls_operator:** Escudero Joseph A → Escudero Construction; 1987-08-01 to 1992-12-01; source msha-controller-operator-history
- **controller_controls_mine:** James D  Uhlinger Sr → Plant 2; 1992-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Champion Sand & Gravel Inc → Plant 2; 1992-12-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James D  Uhlinger Sr → Champion Sand & Gravel Inc; 1992-12-02 to current/open; source msha-controller-operator-history