# Relationship history for MSHA mine 2401799

Current hierarchy: **Clayton Bill → Leaco Mining Inc → Humdinger**

- 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:** Leaco Mining Inc → Humdinger; 1985-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Clayton Bill → Humdinger; 1985-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Clayton Bill → Leaco Mining Inc; 1985-08-01 to current/open; source msha-controller-operator-history