# Relationship history for MSHA mine 1515445

Current hierarchy: **Billy Ray  Carroll → B R C Coal Company Inc → Baileys Creek**

- 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

- **controller_controls_mine:** Billy Ray  Carroll → Baileys Creek; 1983-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B R C Coal Company Inc → Baileys Creek; 1986-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Billy Ray  Carroll → B R C Coal Company Inc; 1986-01-01 to current/open; source msha-controller-operator-history