# Relationship history for MSHA mine 3610130

Current hierarchy: **Barbara J  Benchek → BOORD, BENCHEK AND ASSOC. INC → OSTOP/SCHNEIDER MINE**

- 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:** Boord, Benchek and Assoc. Inc → OSTOP/SCHNEIDER MINE; 2015-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Barbara J  Benchek → OSTOP/SCHNEIDER MINE; 2015-01-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barbara J  Benchek → Boord, Benchek and Assoc. Inc; 2015-01-29 to current/open; source msha-controller-operator-history