Kleinfelder provided geotechnical engineering and environmental permitting services during the preliminary design, final design, and construction phases of the Tustin Avenue/Rose Drive overcrossing. The project was completed as part of the OC Bridges program. The Tustin/Rose grade separation increases driver/pedestrian safety, eliminates delays traffic delays, and improves air/noise conditions. maintaining traffic flow This project presented several unique challenges. First, Kleinfelder identified a significant potential conflict with an existing 60-inch diameter underground water line owned by the Metropolitan Water District of Southern California (MWD) which threatened scheduling delays. The team also faced unanticipated changes to the project design—namely a temporary bypass r

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