# Relationship history for MSHA mine 4605919

Current hierarchy: **Robert E  Murray → Consolidation Coal Company → Marshall County 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:** CONSOL Energy Inc → Marshall County Mine; 1950-01-01 to 2013-12-04; source msha-controller-operator-history
- **operator_operates_mine:** Consolidation Coal Company → Marshall County Mine; 1978-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CONSOL Energy Inc → Consolidation Coal Company; 1978-11-01 to 2013-12-04; source msha-controller-operator-history
- **controller_controls_mine:** Robert E  Murray → Marshall County Mine; 2013-12-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Murray → Consolidation Coal Company; 2013-12-05 to current/open; source msha-controller-operator-history