# Relationship history for MSHA mine 3609833

Current hierarchy: **Peter J  Rostosky → Rostosky Coal, LLC → Christner Project**

- 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:** Rostosky Coal, LLC → Christner Project; 2010-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Peter J  Rostosky → Christner Project; 2010-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Peter J  Rostosky → Rostosky Coal, LLC; 2010-03-08 to current/open; source msha-controller-operator-history