# Relationship history for MSHA mine 5100269

Current hierarchy: **Kajima International Inc → Hawaiian Dredging Construction → 400 TPH Mobil Crushing and Screening Plt**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Kajima International Inc → 400 TPH Mobil Crushing and Screening Plt; 2005-04-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hawaiian Dredging Construction → 400 TPH Mobil Crushing and Screening Plt; 2006-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kajima International Inc → Hawaiian Dredging Construction; 2006-08-16 to current/open; source msha-controller-operator-history