# Relationship history for MSHA mine 3605018

Current hierarchy: **Iron Senergy Holding LLC → Iron Cumberland LLC → Cumberland 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

- **controller_controls_mine:** Usx Corp → Cumberland Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** United States Steel Mining Company Inc → Cumberland Mine; 1974-01-01 to 1993-06-06; source msha-controller-operator-history
- **controller_controls_operator:** Usx Corp → United States Steel Mining Company Inc; 1974-01-01 to 1993-06-06; source msha-controller-operator-history
- **operator_operates_mine:** Cyprus Cumberland Resources Corp → Cumberland Mine; 1993-06-07 to 1999-06-29; source msha-controller-operator-history
- **controller_controls_mine:** Cyprus Amax Minerals Company → Cumberland Mine; 1993-06-07 to 1999-06-29; source msha-controller-operator-history
- **controller_controls_operator:** Cyprus Amax Minerals Company → Cyprus Cumberland Resources Corp; 1993-06-07 to 1999-06-29; source msha-controller-operator-history
- **operator_operates_mine:** Cumberland Coal Resources LP → Cumberland Mine; 1999-06-30 to 2016-07-25; source msha-controller-operator-history
- **controller_controls_mine:** Rag Aktiengesellschaft → Cumberland Mine; 1999-06-30 to 2004-07-30; source msha-controller-operator-history
- **controller_controls_operator:** Rag Aktiengesellschaft → Cumberland Coal Resources LP; 1999-06-30 to 2004-07-30; source msha-controller-operator-history
- **controller_controls_mine:** Foundation Coal Corporation → Cumberland Mine; 2004-07-31 to 2009-07-30; source msha-controller-operator-history
- **controller_controls_operator:** Foundation Coal Corporation → Cumberland Coal Resources LP; 2004-07-31 to 2009-07-30; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Natural Resources, Inc. → Cumberland Mine; 2009-07-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Natural Resources, Inc. → Cumberland Coal Resources LP; 2009-07-31 to 2016-07-25; source msha-controller-operator-history
- **operator_operates_mine:** Iron Cumberland LLC → Cumberland Mine; 2016-07-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alpha Metallurgical Resources Inc → Cumberland Mine; 2016-07-26 to 2020-12-09; source msha-controller-operator-history
- **controller_controls_operator:** Alpha Metallurgical Resources Inc → Iron Cumberland LLC; 2016-07-26 to 2020-12-09; source msha-controller-operator-history
- **controller_controls_mine:** Iron Senergy Holding LLC → Cumberland Mine; 2020-12-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Iron Senergy Holding LLC → Iron Cumberland LLC; 2020-12-10 to current/open; source msha-controller-operator-history