# Relationship history for MSHA mine 4606868

Current hierarchy: **Anderson James → Drennen Enterprises Inc → Drennen No 2**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Anderson James Et Al → Drennen No 2; 1983-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Drennen Enterprises Inc → Drennen No 2; 1984-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anderson James Et Al → Drennen Enterprises Inc; 1984-12-01 to current/open; source msha-controller-operator-history