# Relationship history for MSHA mine 4607571

Current hierarchy: **Bishop Pamela → B & S Construction Inc → Mine No 1 (1)**

- 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:** B & S Construction Inc → Mine No 1 (1); 1988-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bishop Pamela → Mine No 1 (1); 1988-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bishop Pamela → B & S Construction Inc; 1988-09-01 to current/open; source msha-controller-operator-history