# Relationship history for MSHA mine 4606760

Current hierarchy: **CONSOL Energy Inc → Fremont Coal Company → Freemont Surface 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:** Barker Raymond R → Freemont Surface Mine; 1984-03-01 to 1987-03-24; source msha-controller-operator-history
- **operator_operates_mine:** Ruth Trace Minerals Inc → Freemont Surface Mine; 1984-04-01 to 1985-05-16; source msha-controller-operator-history
- **controller_controls_mine:** English W C → Freemont Surface Mine; 1984-04-01 to 1985-05-16; source msha-controller-operator-history
- **controller_controls_operator:** English W C → Ruth Trace Minerals Inc; 1984-04-01 to 1985-05-16; source msha-controller-operator-history
- **operator_operates_mine:** Bronzite Mining Company Inc → Freemont Surface Mine; 1985-05-17 to 1987-01-15; source msha-controller-operator-history
- **controller_controls_operator:** Barker Raymond R → Bronzite Mining Company Inc; 1985-05-17 to 1987-01-15; source msha-controller-operator-history
- **operator_operates_mine:** Fremont Coal Company → Freemont Surface Mine; 1987-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CONSOL Energy Inc → Freemont Surface Mine; 1987-01-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CONSOL Energy Inc → Fremont Coal Company; 1987-01-16 to current/open; source msha-controller-operator-history