# Relationship history for MSHA mine 4703174

Current hierarchy: **Timothy L  Zillges → Zillges Materials, Inc. → Gladiator Impact Crusher - Rental**

- 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:** J C Materials → Gladiator Impact Crusher - Rental; 1999-02-01 to 2012-08-29; source msha-controller-operator-history
- **controller_controls_mine:** James E  Clausen → Gladiator Impact Crusher - Rental; 1999-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James E  Clausen → J C Materials; 1999-02-01 to 2012-08-29; source msha-controller-operator-history
- **controller_controls_mine:** Timothy L  Zillges → Gladiator Impact Crusher - Rental; 2006-08-22 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Zillges Materials, Inc → Gladiator Impact Crusher - Rental; 2012-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Timothy L  Zillges → Zillges Materials, Inc; 2012-08-30 to current/open; source msha-controller-operator-history