# Relationship history for MSHA mine 3609741

Current hierarchy: **Alpha Metallurgical Resources Inc → Contura Freeport  LLC → Freeport 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

- **operator_operates_mine:** Freeport Mining,  LLC → Freeport Mine; 2009-04-14 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Foundation Coal Corporation → Freeport Mine; 2009-04-14 to 2009-07-30; source msha-controller-operator-history
- **controller_controls_operator:** Foundation Coal Corporation → Freeport Mining,  LLC; 2009-04-14 to 2009-07-30; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Freeport Mine; 2009-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Freeport Mining,  LLC; 2009-07-31 to 2016-07-25; source msha-controller-operator-history
- **operator_operates_mine:** Contura Freeport  LLC → Freeport Mine; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Metallurgical Resources Inc → Freeport Mine; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Contura Freeport  LLC; 2016-07-26 to current/open; source msha-controller-operator-history