# Relationship history for MSHA mine 0502397

Current hierarchy: **Union Carbide Corp → Union Carbide Corp → Paystreak**

- 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

- **operator_operates_mine:** Bell & Mc Leroy Mining Company → Paystreak; 1950-01-01 to 1978-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Mc Leroy Robert W & Darrell Bell → Paystreak; 1950-01-01 to 1979-11-19; source msha-controller-operator-history
- **controller_controls_operator:** Mc Leroy Robert W & Darrell Bell → Bell & Mc Leroy Mining Company; 1950-01-01 to 1978-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Union Carbide Corp → Paystreak; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Union Carbide Corp → Paystreak; 1978-09-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Union Carbide Corp → Union Carbide Corp; 1978-09-16 to current/open; source msha-controller-operator-history