# Relationship history for MSHA mine 4609179

Current hierarchy: **Coal Field Transports, Inc. → Big River Mining, LLC → Broad Run Prep Plant**

- 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:** Randel L  Richmond → Broad Run Prep Plant; 2005-12-06 to 2007-06-27; source msha-controller-operator-history
- **controller_controls_mine:** Coal Field Transports, Inc. → Broad Run Prep Plant; 2007-06-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Clearwater Processing LLC → Broad Run Prep Plant; 2009-05-05 to 2011-02-15; source msha-controller-operator-history
- **controller_controls_mine:** Foresight Energy/ Murray Energy et al → Broad Run Prep Plant; 2009-05-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Foresight Energy/ Murray Energy et al → Clearwater Processing LLC; 2009-05-05 to 2011-02-15; source msha-controller-operator-history
- **controller_controls_operator:** Coalfield Transport Inc et al → Clearwater Processing LLC; 2009-05-05 to 2011-02-15; source msha-controller-operator-history
- **operator_operates_mine:** Big River Mining, LLC → Broad Run Prep Plant; 2011-02-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randel L  Richmond → Big River Mining, LLC; 2011-02-16 to 2007-06-27; source msha-controller-operator-history
- **controller_controls_operator:** Coal Field Transports, Inc. → Big River Mining, LLC; 2011-02-16 to current/open; source msha-controller-operator-history