# Relationship history for MSHA mine 2302548

Current hierarchy: **Robert G Haney; Travis D Campbell → HCH, LLC → HCH 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

- **operator_operates_mine:** HCH, LLC → HCH Quarry; 2022-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert G Haney et al → HCH Quarry; 2022-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert G Haney et al → HCH, LLC; 2022-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Travis D Campbell et al → HCH, LLC; 2022-06-02 to current/open; source msha-controller-operator-history