# Relationship history for MSHA mine 3503630

Current hierarchy: **Richard G  Roberts; Jerry R  Becker → X-ROCK LLC → Stuart 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:** Stuart Quarry Rock Products → Stuart Quarry; 2006-01-25 to 2009-01-08; source msha-controller-operator-history
- **controller_controls_mine:** Jean K.  Glasscock et al → Stuart Quarry; 2006-01-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jean K.  Glasscock et al → Stuart Quarry Rock Products; 2006-01-25 to 2009-01-08; source msha-controller-operator-history
- **controller_controls_operator:** Robert A  Bethell et al → Stuart Quarry Rock Products; 2006-01-25 to 2009-01-08; source msha-controller-operator-history
- **operator_operates_mine:** X-ROCK LLC → Stuart Quarry; 2009-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jerry R  Becker et al → Stuart Quarry; 2009-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jerry R  Becker et al → X-ROCK LLC; 2009-01-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard G  Roberts et al → X-ROCK LLC; 2009-01-09 to current/open; source msha-controller-operator-history