# Relationship history for MSHA mine 4105566

Current hierarchy: **Philip  Crowder; Myles  Culbertson → Texrox LLC → Texrox 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:** Texrox LLC → Texrox Quarry; 2021-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Philip  Crowder et al → Texrox Quarry; 2021-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Philip  Crowder et al → Texrox LLC; 2021-06-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Myles  Culbertson et al → Texrox LLC; 2021-06-02 to current/open; source msha-controller-operator-history