# Relationship history for MSHA mine 0404672

Current hierarchy: **Christman Errol-Herb Miller → Christman Mining Enterprises → German Bar 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Christman Mining Enterprises → German Bar Mine; 1983-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Christman Errol-Herb Miller Et Al → German Bar Mine; 1983-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christman Errol-Herb Miller Et Al → Christman Mining Enterprises; 1983-09-01 to current/open; source msha-controller-operator-history