# Relationship history for MSHA mine 1516248

Current hierarchy: **Alpha Natural Resources, Inc. → Panther Mining LLC → Mine No. 1A**

- 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:** Ashland Inc et al → Mine No. 1A; 1984-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Arch Of Kentucky → Mine No. 1A; 1987-10-01 to 2002-07-10; source msha-controller-operator-history
- **controller_controls_operator:** Ashland Inc et al → Arch Of Kentucky; 1987-10-01 to 2002-07-10; source msha-controller-operator-history
- **controller_controls_mine:** Cumberland Resources Corporation → Mine No. 1A; 1999-09-01 to 2010-04-18; source msha-controller-operator-history
- **operator_operates_mine:** Panther Mining LLC → Mine No. 1A; 2002-07-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cumberland Resources Corporation → Panther Mining LLC; 2002-07-11 to 2010-04-18; source msha-controller-operator-history
- **controller_controls_mine:** Massey Energy Company → Mine No. 1A; 2010-04-19 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Massey Energy Company → Panther Mining LLC; 2010-04-19 to 2011-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Mine No. 1A; 2011-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Panther Mining LLC; 2011-06-01 to current/open; source msha-controller-operator-history