# Relationship history for MSHA mine 4105831

Current hierarchy: **Richard Wayne  Jones → Rock Creek Materials LLC. → Graford 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:** Rock Creek Materials LLC. → Graford Quarry; 2025-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard Wayne  Jones → Graford Quarry; 2025-12-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard Wayne  Jones → Rock Creek Materials LLC.; 2025-12-19 to current/open; source msha-controller-operator-history