# Relationship history for MSHA mine 0901123

Current hierarchy: **Garland  Burton; Johnny  Burton → Ruckersville Quarry Llc → RUCKERSVILLE QUARRY,LLC**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Ruckersville Quarry Llc → RUCKERSVILLE QUARRY,LLC; 1999-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Garland  Burton et al → RUCKERSVILLE QUARRY,LLC; 1999-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Garland  Burton et al → Ruckersville Quarry Llc; 1999-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Johnny  Burton et al → Ruckersville Quarry Llc; 1999-07-01 to current/open; source msha-controller-operator-history