# Relationship history for MSHA mine 4104710

Current hierarchy: **John C  Stuart; Richard N  Beach → S.A. Rock Products → Deep Creek Materials**

- 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:** S.A. Rock Products → Deep Creek Materials; 2008-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard N  Beach et al → Deep Creek Materials; 2008-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard N  Beach et al → S.A. Rock Products; 2008-02-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John C  Stuart et al → S.A. Rock Products; 2008-02-12 to current/open; source msha-controller-operator-history