# Relationship history for MSHA mine 4201404

Current hierarchy: **Shumway Glen A → Glen Shumway Mining Company → Strawberry**

- 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:** Deloy Shumway Mining Company → Strawberry; 1950-01-01 to 1982-02-24; source msha-controller-operator-history
- **controller_controls_mine:** Shumway Deloy → Strawberry; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shumway Deloy → Deloy Shumway Mining Company; 1950-01-01 to 1982-02-24; source msha-controller-operator-history
- **controller_controls_mine:** Shumway Glen A → Strawberry; 1980-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Glen Shumway Mining Company → Strawberry; 1982-02-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Shumway Glen A → Glen Shumway Mining Company; 1982-02-25 to current/open; source msha-controller-operator-history