# Relationship history for MSHA mine 4606085

Current hierarchy: **Belco Petroleum Corp → Kitchekan Fuel Corp → Ring Branch No 6a**

- 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

- **controller_controls_mine:** Belco Petroleum Corp → Ring Branch No 6a; 1976-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Traci D Coal Company Inc → Ring Branch No 6a; 1979-12-01 to 1980-05-05; source msha-controller-operator-history
- **controller_controls_mine:** Richard T  Hatfield et al → Ring Branch No 6a; 1979-12-01 to 1980-05-05; source msha-controller-operator-history
- **controller_controls_operator:** Richard T  Hatfield et al → Traci D Coal Company Inc; 1979-12-01 to 1980-05-05; source msha-controller-operator-history
- **operator_operates_mine:** Kitchekan Fuel Corp → Ring Branch No 6a; 1980-05-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Belco Petroleum Corp → Kitchekan Fuel Corp; 1980-05-06 to current/open; source msha-controller-operator-history