# Relationship history for MSHA mine 4609195

Current hierarchy: **Alpha Natural Resources Holdings, Inc → Premium Energy LLC → Mine #1 Highwall Miner**

- 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:** Alpha Natural Resources, Inc. → Mine #1 Highwall Miner; 2005-11-02 to 2016-07-25; source msha-controller-operator-history
- **operator_operates_mine:** Premium Energy LLC → Mine #1 Highwall Miner; 2012-03-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Premium Energy LLC; 2012-03-27 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Mine #1 Highwall Miner; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → Premium Energy LLC; 2016-07-26 to current/open; source msha-controller-operator-history