# Relationship history for MSHA mine 0502512

Current hierarchy: **Nelson Joe → Nelson Mining Inc → All Stars**

- 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:** Union Carbide Corp → All Stars; 1950-01-01 to 1989-02-05; source msha-controller-operator-history
- **controller_controls_mine:** Union Carbide Corp → All Stars; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Union Carbide Corp → Union Carbide Corp; 1950-01-01 to 1989-02-05; source msha-controller-operator-history
- **controller_controls_mine:** Nelson Joe → All Stars; 1988-02-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Nelson Mining Inc → All Stars; 1989-02-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Nelson Joe → Nelson Mining Inc; 1989-02-06 to current/open; source msha-controller-operator-history