# Relationship history for MSHA mine 3608349

Current hierarchy: **Alpha Metallurgical Resources Inc → River Processing Corporation → Freeport Surface Facilities**

- 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:** Hayhurst James W Ii → Freeport Surface Facilities; 1987-08-05 to 1995-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Dynamic Recovery Inc → Freeport Surface Facilities; 1992-05-01 to 1995-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Hayhurst James W Ii → Dynamic Recovery Inc; 1992-05-01 to 1995-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Cyprus River Processing Corp → Freeport Surface Facilities; 1996-01-01 to 1999-06-29; source msha-controller-operator-history
- **controller_controls_mine:** Cyprus Amax Minerals Company → Freeport Surface Facilities; 1996-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cyprus Amax Minerals Company → Cyprus River Processing Corp; 1996-01-01 to 1999-06-29; source msha-controller-operator-history
- **operator_operates_mine:** Rag River Processing Corp → Freeport Surface Facilities; 1999-06-30 to 2004-08-02; source msha-controller-operator-history
- **controller_controls_mine:** Rag Aktiengesellschaft → Freeport Surface Facilities; 1999-06-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rag Aktiengesellschaft → Rag River Processing Corp; 1999-06-30 to 2004-08-02; source msha-controller-operator-history
- **operator_operates_mine:** River Processing Corporation → Freeport Surface Facilities; 2004-08-03 to 2017-11-08; source msha-controller-operator-history
- **controller_controls_mine:** Foundation Coal Corporation → Freeport Surface Facilities; 2004-08-03 to 2009-07-30; source msha-controller-operator-history
- **controller_controls_operator:** Foundation Coal Corporation → River Processing Corporation; 2004-08-03 to 2009-07-30; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Freeport Surface Facilities; 2009-07-31 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → River Processing Corporation; 2009-07-31 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources Holdings, Inc → Freeport Surface Facilities; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources Holdings, Inc → River Processing Corporation; 2016-07-26 to 2017-11-08; source msha-controller-operator-history
- **operator_operates_mine:** River Processing Corporation → Freeport Surface Facilities; 2017-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Metallurgical Resources Inc → Freeport Surface Facilities; 2017-11-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → River Processing Corporation; 2017-11-09 to current/open; source msha-controller-operator-history