# Relationship history for MSHA mine 0901129

Current hierarchy: **Joe R  Bennett; Robert E  Theis → B & T Quarries Inc → B&T QUARRIES, INC.**

- 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:** B & T Quarries Inc → B&T QUARRIES, INC.; 2000-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joe R  Bennett  et al → B&T QUARRIES, INC.; 2000-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe R  Bennett  et al → B & T Quarries Inc; 2000-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Robert E  Theis  et al → B & T Quarries Inc; 2000-03-01 to current/open; source msha-controller-operator-history