# Relationship history for MSHA mine 3608872

Current hierarchy: **Richard A  Jenkins → Rich Jenkins Inc → Lewis 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:** Rich Jenkins Excavating → Lewis Quarry; 2000-08-01 to 2006-11-15; source msha-controller-operator-history
- **controller_controls_mine:** Richard A  Jenkins → Lewis Quarry; 2000-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard A  Jenkins → Rich Jenkins Excavating; 2000-08-01 to 2006-11-15; source msha-controller-operator-history
- **operator_operates_mine:** Rich Jenkins Inc → Lewis Quarry; 2006-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Richard A  Jenkins → Lewis Quarry; 2006-11-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard A  Jenkins → Rich Jenkins Inc; 2006-11-16 to current/open; source msha-controller-operator-history