# Relationship history for MSHA mine 0600858

Current hierarchy: **Kenneth A  Burns → Burns Construction Co. Inc. → Burns Portable Plant**

- 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

- **controller_controls_mine:** Kenneth A  Burns → Burns Portable Plant; 2001-06-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Burns Construction Co. Inc. → Burns Portable Plant; 2026-04-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kenneth A  Burns → Burns Construction Co. Inc.; 2026-04-29 to current/open; source msha-controller-operator-history