# Relationship history for MSHA mine 4201460

Current hierarchy: **Shumway Ray → Allied Shumway Minerals → Jimbo Bob #21 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Allied Shumway Minerals → Jimbo Bob #21 Mine; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Shumway Ray → Jimbo Bob #21 Mine; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shumway Ray → Allied Shumway Minerals; 1978-03-09 to current/open; source msha-controller-operator-history