# Relationship history for MSHA mine 3002326

Current hierarchy: **Lee Richard A → Richard A Lee Excavating → LEE PIT**

- 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

- **controller_controls_mine:** Penn-Dixie Industries Inc → LEE PIT; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Callanan Industries Inc → LEE PIT; 1978-03-09 to 1979-10-31; source msha-controller-operator-history
- **controller_controls_operator:** Penn-Dixie Industries Inc → Callanan Industries Inc; 1978-03-09 to 1979-10-31; source msha-controller-operator-history
- **operator_operates_mine:** Richard A Lee Excavating → LEE PIT; 1979-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lee Richard A → LEE PIT; 1979-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lee Richard A → Richard A Lee Excavating; 1979-11-01 to current/open; source msha-controller-operator-history