# Relationship history for MSHA mine 3004035

Current hierarchy: **Austin Eugene  Cole; Mary C  Cole → Cole Trucking and Gravel → Cole Gravel 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:** Cole Trucking and Gravel → Cole Gravel Pit; 2019-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Austin Eugene  Cole et al → Cole Gravel Pit; 2019-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Austin Eugene  Cole et al → Cole Trucking and Gravel; 2019-07-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mary C  Cole et al → Cole Trucking and Gravel; 2019-07-29 to current/open; source msha-controller-operator-history