# Relationship history for MSHA mine 4608902

Current hierarchy: **Alpha Natural Resources, Inc. → Laurel Creek Company Inc → No 4**

- 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:** Rag Aktiengesellschaft → No 4; 1995-06-01 to 2004-07-29; source msha-controller-operator-history
- **operator_operates_mine:** Laurel Creek Company Inc → No 4; 2001-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rag Aktiengesellschaft → Laurel Creek Company Inc; 2001-06-01 to 2004-07-29; source msha-controller-operator-history
- **controller_controls_mine:** Foundation Coal Corporation → No 4; 2004-07-30 to 2009-07-30; source msha-controller-operator-history
- **controller_controls_operator:** Foundation Coal Corporation → Laurel Creek Company Inc; 2004-07-30 to 2009-07-30; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → No 4; 2009-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Laurel Creek Company Inc; 2009-07-31 to current/open; source msha-controller-operator-history