# Relationship history for MSHA mine 4606782

Current hierarchy: **Younce Leonard → New River Fuel Inc → Hampton No 40 Mine**

- 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:** Younce Leonard → Hampton No 40 Mine; 1976-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** New River Fuel Inc → Hampton No 40 Mine; 1984-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Younce Leonard → New River Fuel Inc; 1984-04-01 to current/open; source msha-controller-operator-history