# Relationship history for MSHA mine 3003550

Current hierarchy: **Leon J Mehl Jr → Mehlon Trucking Inc → Lurock**

- 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

- **controller_controls_mine:** Leon  Mehl → Lurock; 1986-07-01 to 2021-01-10; source msha-controller-operator-history
- **operator_operates_mine:** Michael E. Wendel → Lurock; 2006-05-23 to 2007-04-22; source msha-controller-operator-history
- **controller_controls_mine:** Michael E.  Wendel → Lurock; 2006-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael E.  Wendel → Michael E. Wendel; 2006-05-23 to 2007-04-22; source msha-controller-operator-history
- **operator_operates_mine:** Mehlon Trucking Inc → Lurock; 2007-04-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leon  Mehl → Mehlon Trucking Inc; 2007-04-23 to 2021-01-10; source msha-controller-operator-history
- **controller_controls_mine:** Leon J Mehl Jr → Lurock; 2021-01-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Leon J Mehl Jr → Mehlon Trucking Inc; 2021-01-11 to current/open; source msha-controller-operator-history