# Relationship history for MSHA mine 4606012

Current hierarchy: **Ward Darrell E-Mark → Audry Mining Inc → Audry No 1 Mine**

- 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:** Audry Mining Inc → Audry No 1 Mine; 1979-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ward Darrell E-Mark Et Al → Audry No 1 Mine; 1979-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ward Darrell E-Mark Et Al → Audry Mining Inc; 1979-06-01 to current/open; source msha-controller-operator-history