# Relationship history for MSHA mine 4405909

Current hierarchy: **Freeman Daniel V → Nessa Coal Company Inc → Strip #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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Freeman Daniel V → Strip #2; 1981-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Nessa Coal Company Inc → Strip #2; 1982-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Freeman Daniel V → Nessa Coal Company Inc; 1982-06-01 to current/open; source msha-controller-operator-history