# Relationship history for MSHA mine 3402137

Current hierarchy: **Cinda  Wood; Darren  Wood → Cornerstone Crushing LLC → Blue Pool 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Summers Blue Lake Quarry → Blue Pool Quarry; 2013-08-02 to 2025-08-24; source msha-controller-operator-history
- **controller_controls_mine:** Floyd  Summers et al → Blue Pool Quarry; 2013-08-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Floyd  Summers et al → Summers Blue Lake Quarry; 2013-08-02 to 2025-08-24; source msha-controller-operator-history
- **controller_controls_operator:** Debbie  Summers et al → Summers Blue Lake Quarry; 2013-08-02 to 2025-08-24; source msha-controller-operator-history
- **operator_operates_mine:** Cornerstone Crushing LLC → Blue Pool Quarry; 2025-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Cinda  Wood et al → Blue Pool Quarry; 2025-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cinda  Wood et al → Cornerstone Crushing LLC; 2025-08-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Darren  Wood et al → Cornerstone Crushing LLC; 2025-08-25 to current/open; source msha-controller-operator-history