# Relationship history for MSHA mine 3609046

Current hierarchy: **Alpha Natural Resources, Inc. → AMFIRE Mining Company LLC → Zelenske 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:** Robindale Energy Services Inc → Zelenske Mine; 2000-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Laurel Energy, L.P. → Zelenske Mine; 2001-11-01 to 2003-03-10; source msha-controller-operator-history
- **controller_controls_operator:** Robindale Energy Services Inc → Laurel Energy, L.P.; 2001-11-01 to 2003-03-10; source msha-controller-operator-history
- **operator_operates_mine:** AMFIRE Mining Company LLC → Zelenske Mine; 2003-03-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Zelenske Mine; 2003-03-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → AMFIRE Mining Company LLC; 2003-03-11 to current/open; source msha-controller-operator-history