# Relationship history for MSHA mine 0102229

Current hierarchy: **Bowen Albert S → Nickel Plate Mining Company Inc → Nickel Plate Mine No 19**

- 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:** Bowen Albert S Et Al → Nickel Plate Mine No 19; 1977-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Nickel Plate Mining Company Inc → Nickel Plate Mine No 19; 1980-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bowen Albert S Et Al → Nickel Plate Mining Company Inc; 1980-07-01 to current/open; source msha-controller-operator-history