# Relationship history for MSHA mine 0100851

Current hierarchy: **Alabama Kanu Holdings LLC → Crimson Oak Grove Resources LLC → Oak Grove 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:** U.S. Steel Mining Company, LLC → Oak Grove Mine; 1950-01-01 to 2003-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Usx Corp → Oak Grove Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Usx Corp → U.S. Steel Mining Company, LLC; 1950-01-01 to 2003-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Oak Grove Resources LLC → Oak Grove Mine; 2003-07-01 to 2019-04-29; source msha-controller-operator-history
- **controller_controls_mine:** Benjamin M  Statler et al → Oak Grove Mine; 2003-07-01 to 2007-07-30; source msha-controller-operator-history
- **controller_controls_operator:** Benjamin M  Statler et al → Oak Grove Resources LLC; 2003-07-01 to 2007-07-30; source msha-controller-operator-history
- **controller_controls_operator:** Questor Management Company LLC  et al → Oak Grove Resources LLC; 2003-07-01 to 2007-07-30; source msha-controller-operator-history
- **controller_controls_mine:** Cleveland-Cliffs Inc → Oak Grove Mine; 2007-07-31 to 2015-12-21; source msha-controller-operator-history
- **controller_controls_operator:** Cleveland-Cliffs Inc → Oak Grove Resources LLC; 2007-07-31 to 2015-12-21; source msha-controller-operator-history
- **controller_controls_mine:** Virginia Conservation Legacy Fund (VCLF) → Oak Grove Mine; 2015-12-22 to 2016-11-17; source msha-controller-operator-history
- **controller_controls_operator:** Virginia Conservation Legacy Fund (VCLF) → Oak Grove Resources LLC; 2015-12-22 to 2016-11-17; source msha-controller-operator-history
- **controller_controls_mine:** ERP Compliant Fuels, LLC → Oak Grove Mine; 2016-11-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** ERP Compliant Fuels, LLC → Oak Grove Resources LLC; 2016-11-18 to 2019-04-29; source msha-controller-operator-history
- **operator_operates_mine:** Murray Oak Grove Coal LLC → Oak Grove Mine; 2019-04-30 to 2020-09-16; source msha-controller-operator-history
- **controller_controls_mine:** Robert E  Murray → Oak Grove Mine; 2019-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Murray → Murray Oak Grove Coal LLC; 2019-04-30 to 2020-09-16; source msha-controller-operator-history
- **operator_operates_mine:** Crimson Oak Grove Resources LLC → Oak Grove Mine; 2020-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** ACNR Holdings, Inc → Oak Grove Mine; 2020-09-17 to 2024-08-06; source msha-controller-operator-history
- **controller_controls_operator:** ACNR Holdings, Inc → Crimson Oak Grove Resources LLC; 2020-09-17 to 2024-08-06; source msha-controller-operator-history
- **controller_controls_mine:** Alabama Kanu Holdings LLC → Oak Grove Mine; 2024-08-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alabama Kanu Holdings LLC → Crimson Oak Grove Resources LLC; 2024-08-07 to current/open; source msha-controller-operator-history