# Relationship history for MSHA mine 3003506

Current hierarchy: **Joseph L  Roberts; Jeanette M Roberts → Roberts'  Stone LLC → Roberts' Stone 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Roberts'  Stone LLC → Roberts' Stone LLC; 2005-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joseph L  Roberts et al → Roberts' Stone LLC; 2005-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph L  Roberts et al → Roberts'  Stone LLC; 2005-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeanette M Roberts et al → Roberts'  Stone LLC; 2005-08-16 to current/open; source msha-controller-operator-history