# Relationship history for MSHA mine 0202823

Current hierarchy: **Blaser Aquisition Corporation → American Sandstone → GERONIMO QUARRY**

- 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

- **controller_controls_mine:** Blaser Aquisition Corporation → GERONIMO QUARRY; 1997-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** American Sandstone → GERONIMO QUARRY; 1999-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Blaser Aquisition Corporation → American Sandstone; 1999-06-01 to current/open; source msha-controller-operator-history