# Relationship history for MSHA mine 1519330

Current hierarchy: **Stewart  Vance → KY Diamond, Inc. → No. 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** KY Diamond, Inc. → No. 1; 2008-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stewart  Vance → No. 1; 2008-10-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stewart  Vance → KY Diamond, Inc.; 2008-10-10 to current/open; source msha-controller-operator-history