# Relationship history for MSHA mine 0404427

Current hierarchy: **Herman Robert S → Herman Supply Company Inc → Lambe Pit**

- 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 Supply Company Inc → Lambe Pit; 1980-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Herman Robert S → Lambe Pit; 1980-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Herman Robert S → Herman Supply Company Inc; 1980-06-01 to current/open; source msha-controller-operator-history