# Relationship history for MSHA mine 2302486

Current hierarchy: **Barbara Tracy"  Bachelier" → Horseshoe Bend Dock & Rip Rap Service → Rip Rap Plant 2**

- 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:** Barbara Tracy"  Bachelier" → Rip Rap Plant 2; 2014-05-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Horseshoe Bend Dock & Rip Rap Service → Rip Rap Plant 2; 2014-12-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barbara Tracy"  Bachelier" → Horseshoe Bend Dock & Rip Rap Service; 2014-12-08 to current/open; source msha-controller-operator-history