# Relationship history for MSHA mine 3606814

Current hierarchy: **Miller Richard A & Thomas Thompson → Valier Mining → Means #1**

- 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:** Valier Mining → Means #1; 1979-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Miller Richard A & Thomas Thompson → Means #1; 1979-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Miller Richard A & Thomas Thompson → Valier Mining; 1979-03-01 to current/open; source msha-controller-operator-history