# Relationship history for MSHA mine 3003878

Current hierarchy: **Thomas  Auringer → ELLENVILLE SAND & GRAVEL → ELLENVILLE SAND & GRAVEL**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Ellenville Sand & Gravel → ELLENVILLE SAND & GRAVEL; 2013-04-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Karen  Osterhoudt → ELLENVILLE SAND & GRAVEL; 2013-04-22 to 2019-02-04; source msha-controller-operator-history
- **controller_controls_operator:** Karen  Osterhoudt → Ellenville Sand & Gravel; 2013-04-22 to 2019-02-04; source msha-controller-operator-history
- **controller_controls_mine:** Thomas  Auringer → ELLENVILLE SAND & GRAVEL; 2019-02-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thomas  Auringer → Ellenville Sand & Gravel; 2019-02-05 to current/open; source msha-controller-operator-history