# Relationship history for MSHA mine 3002823

Current hierarchy: **Mc Laud Lynn → Lynn Mc Laud → Decker 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:** Harvey P Decker → Decker Quarry; 1987-11-01 to 1989-08-23; source msha-controller-operator-history
- **controller_controls_mine:** Harvey P  Decker → Decker Quarry; 1987-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harvey P  Decker → Harvey P Decker; 1987-11-01 to 1989-08-23; source msha-controller-operator-history
- **operator_operates_mine:** Lynn Mc Laud → Decker Quarry; 1989-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Laud Lynn → Decker Quarry; 1989-08-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Laud Lynn → Lynn Mc Laud; 1989-08-24 to current/open; source msha-controller-operator-history