# Relationship history for MSHA mine 1504670

Current hierarchy: **Alpha Natural Resources, Inc. → Stillhouse Mining, LLC → Mine # 37**

- 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:** United States Steel Mining Company Inc → Mine # 37; 1950-01-01 to 1984-09-30; source msha-controller-operator-history
- **controller_controls_mine:** Usx Corp → Mine # 37; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Usx Corp → United States Steel Mining Company Inc; 1950-01-01 to 1984-09-30; source msha-controller-operator-history
- **operator_operates_mine:** Arch Of Kentucky → Mine # 37; 1984-10-01 to 2005-07-18; source msha-controller-operator-history
- **controller_controls_mine:** Ashland Inc et al → Mine # 37; 1984-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc et al → Arch Of Kentucky; 1984-10-01 to 2005-07-18; source msha-controller-operator-history
- **controller_controls_mine:** Cumberland Resources Corporation → Mine # 37; 1999-10-04 to 2010-04-18; source msha-controller-operator-history
- **operator_operates_mine:** Stillhouse Mining, LLC → Mine # 37; 2005-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cumberland Resources Corporation → Stillhouse Mining, LLC; 2005-07-19 to 2010-04-18; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Mine # 37; 2010-04-19 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Stillhouse Mining, LLC; 2010-04-19 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Mine # 37; 2011-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Stillhouse Mining, LLC; 2011-06-01 to current/open; source msha-controller-operator-history