# Relationship history for MSHA mine 4105715

Current hierarchy: **Jeffrey M Stratton → Basin Rock Products → Bronte Pit**

- 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

- **controller_controls_mine:** Jeffrey M Stratton → Bronte Pit; 2020-01-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Basin Rock Products → Bronte Pit; 2023-11-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeffrey M Stratton → Basin Rock Products; 2023-11-06 to current/open; source msha-controller-operator-history