# Relationship history for MSHA mine 3101513

Current hierarchy: **Nello L  Teer Jr; R Dillard  Teer → Aggregate Associates → Rocky Mount Quarry No 2 Plant**

- 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:** Aggregate Associates → Rocky Mount Quarry No 2 Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** R Dillard  Teer et al → Rocky Mount Quarry No 2 Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** R Dillard  Teer et al → Aggregate Associates; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nello L  Teer Jr et al → Aggregate Associates; 1950-01-01 to current/open; source msha-controller-operator-history