# Relationship history for MSHA mine 3303964

Current hierarchy: **Milarcik Michael A → Triad Mining Inc → Clark**

- 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:** Milarcik Michael A → Clark; 1977-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Triad Mining Inc → Clark; 1983-12-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Milarcik Michael A → Triad Mining Inc; 1983-12-01 to current/open; source msha-controller-operator-history