# Relationship history for MSHA mine 2800997

Current hierarchy: **Herman  Liedtka → Herman Liedtka Inc → Woodmansie**

- 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:** Herman Liedtka Inc → Woodmansie; 1997-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Herman  Liedtka → Woodmansie; 1997-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Herman  Liedtka → Herman Liedtka Inc; 1997-07-01 to current/open; source msha-controller-operator-history