# Relationship history for MSHA mine 3610499

Current hierarchy: **Robert P  Reddon → Backcountry Bluestone LLC → Pigpen 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:** Backcountry Bluestone LLC → Pigpen Quarry; 2026-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Robert P  Reddon → Pigpen Quarry; 2026-05-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert P  Reddon → Backcountry Bluestone LLC; 2026-05-20 to current/open; source msha-controller-operator-history