# Relationship history for MSHA mine 3700229

Current hierarchy: **Harry W  Cole; Linda C  Cole → H. C. Trucking, Inc. → H. C. Trucking 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:** H. C. Trucking, Inc. → H. C. Trucking Pit; 2017-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Linda C  Cole et al → H. C. Trucking Pit; 2017-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Linda C  Cole et al → H. C. Trucking, Inc.; 2017-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harry W  Cole et al → H. C. Trucking, Inc.; 2017-04-12 to current/open; source msha-controller-operator-history