# Relationship history for MSHA mine 3304513

Current hierarchy: **Constellation Energy Group → PC West Virginia Synthetic Fuel #2 LLC → PCWV #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

- **operator_operates_mine:** PC West Virginia Synthetic Fuel #2 LLC → PCWV #2; 2002-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Constellation Energy Group → PCWV #2; 2002-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Constellation Energy Group → PC West Virginia Synthetic Fuel #2 LLC; 2002-11-01 to current/open; source msha-controller-operator-history