# Relationship history for MSHA mine 4608773

Current hierarchy: **Baltimore Gas & Electric Company → Cosi Synfuels WV #1 Inc → PC WV Synthetic Fuel #1 LLC**

- 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

- **operator_operates_mine:** Cosi Synfuels WV #1 Inc → PC WV Synthetic Fuel #1 LLC; 1999-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Baltimore Gas & Electric Company → PC WV Synthetic Fuel #1 LLC; 1999-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Baltimore Gas & Electric Company → Cosi Synfuels WV #1 Inc; 1999-05-01 to current/open; source msha-controller-operator-history