# Relationship history for MSHA mine 4104125

Current hierarchy: **Chester  Lucherk → Lucherk'S Gravel Company → LUCHERKS GRAVEL CO.**

- 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

- **operator_operates_mine:** Lucherk'S Gravel Company → LUCHERKS GRAVEL CO.; 2000-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Chester  Lucherk → LUCHERKS GRAVEL CO.; 2000-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Chester  Lucherk → Lucherk'S Gravel Company; 2000-01-01 to current/open; source msha-controller-operator-history