# Relationship history for MSHA mine 3608994

Current hierarchy: **Glenn  Gregory Jr; Glenn  Gregory III → Gregory Flagstone → GAMBLE QUARRY #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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Gregory Flagstone → GAMBLE QUARRY #2; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Glenn  Gregory III  et al → GAMBLE QUARRY #2; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Glenn  Gregory III  et al → Gregory Flagstone; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Glenn  Gregory Jr  et al → Gregory Flagstone; 2001-06-01 to current/open; source msha-controller-operator-history