# Relationship history for MSHA mine 4404856

Current hierarchy: **Coronado Coal LLC → Buchanan Minerals, LLC → Buchanan Mine #1**

- 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:** CONSOL Energy Inc → Buchanan Mine #1; 1950-01-01 to 2013-12-04; source msha-controller-operator-history
- **operator_operates_mine:** Consolidation Coal Company → Buchanan Mine #1; 1977-09-01 to 2013-12-05; source msha-controller-operator-history
- **controller_controls_operator:** CONSOL Energy Inc → Consolidation Coal Company; 1977-09-01 to 2013-12-04; source msha-controller-operator-history
- **controller_controls_mine:** Robert E  Murray → Buchanan Mine #1; 2013-12-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Murray → Consolidation Coal Company; 2013-12-05 to 2013-12-05; source msha-controller-operator-history
- **operator_operates_mine:** CONSOL Buchanan Mining Company LLC → Buchanan Mine #1; 2013-12-06 to 2016-03-30; source msha-controller-operator-history
- **controller_controls_mine:** CONSOL Energy Inc → Buchanan Mine #1; 2013-12-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CONSOL Energy Inc → CONSOL Buchanan Mining Company LLC; 2013-12-06 to 2016-03-30; source msha-controller-operator-history
- **operator_operates_mine:** Buchanan Minerals, LLC → Buchanan Mine #1; 2016-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Coronado Coal LLC → Buchanan Mine #1; 2016-03-31 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Coronado Coal LLC → Buchanan Minerals, LLC; 2016-03-31 to current/open; source msha-controller-operator-history