# Relationship history for MSHA mine 1601599

Current hierarchy: **Gayland Roy  Crowe Sr; Gayland Roy  Crowe Jr → Crowe's Sand and Gravel LLC → Plant 1**

- 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:** Crowe's Sand and Gravel LLC → Plant 1; 2021-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gayland Roy  Crowe Sr et al → Plant 1; 2021-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gayland Roy  Crowe Sr et al → Crowe's Sand and Gravel LLC; 2021-05-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gayland Roy  Crowe Jr et al → Crowe's Sand and Gravel LLC; 2021-05-24 to current/open; source msha-controller-operator-history