# Relationship history for MSHA mine 3607487

Current hierarchy: **Bunting James R → J M Brenner Company → Brenner'S 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:** J M Brenner Company → Brenner'S Quarry; 1983-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bunting James R → Brenner'S Quarry; 1983-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bunting James R → J M Brenner Company; 1983-08-01 to current/open; source msha-controller-operator-history