# Relationship history for MSHA mine 4601400

Current hierarchy: **CONSOL Energy Inc → Bishop Coal Company → Bishop #34 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Bishop Coal Company → Bishop #34 Mine; 1950-01-01 to 1985-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Consolidation Coal Co & Inland Steel Co → Bishop #34 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Consolidation Coal Co & Inland Steel Co → Bishop Coal Company; 1950-01-01 to 1985-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Bishop Coal Company → Bishop #34 Mine; 1985-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CONSOL Energy Inc → Bishop #34 Mine; 1985-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CONSOL Energy Inc → Bishop Coal Company; 1985-09-01 to current/open; source msha-controller-operator-history