# Relationship history for MSHA mine 0801245

Current hierarchy: **Sam  Lo Bue → Downrite Engineering Corp → DOWNRITE ENGINEERING CORP.**

- 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:** Downrite Engineering Corp → DOWNRITE ENGINEERING CORP.; 1997-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sam  Lo Bue → DOWNRITE ENGINEERING CORP.; 1997-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sam  Lo Bue → Downrite Engineering Corp; 1997-04-01 to current/open; source msha-controller-operator-history