# Relationship history for MSHA mine 3503670

Current hierarchy: **Richard G  Roberts; Jerry R  Becker → X-Rock LLC → X-Rock**

- 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

- **controller_controls_mine:** John B  Dalton → X-Rock; 1995-02-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dalton Rock Inc → X-Rock; 2007-07-06 to 2009-01-19; source msha-controller-operator-history
- **controller_controls_operator:** John B  Dalton → Dalton Rock Inc; 2007-07-06 to 2009-01-19; source msha-controller-operator-history
- **controller_controls_mine:** Richard G  Roberts et al → X-Rock; 2009-01-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** X-Rock LLC → X-Rock; 2009-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard G  Roberts et al → X-Rock LLC; 2009-01-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry R  Becker et al → X-Rock LLC; 2009-01-20 to current/open; source msha-controller-operator-history