# Relationship history for MSHA mine 4202516

Current hierarchy: **Mark  Bingham → Precision Development Group Inc → Precision Rock**

- 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:** Precision Development Group Inc → Precision Rock; 2008-09-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mark  Bingham → Precision Rock; 2008-09-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mark  Bingham → Precision Development Group Inc; 2008-09-03 to current/open; source msha-controller-operator-history