# Relationship history for MSHA mine 4202589

Current hierarchy: **Howard  Bovers → Second Chance Mining → Second Chance**

- 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:** Second Chance Mining → Second Chance; 2012-05-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Howard  Bovers → Second Chance; 2012-05-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Howard  Bovers → Second Chance Mining; 2012-05-16 to current/open; source msha-controller-operator-history