The North River Wastewater Resource and Recovery Facility (WRRF) is a unique 28-acre structure, built over the Hudson River in Upper Manhattan, on a reinforced concrete platform supported by approximately 2,500 caissons embedded into bedrock. Riverbank State Park’s recreational areas and athletic facilities sit atop the New York City Department of Environmental Protection (NYCDEP) facility serving western Manhattan, with a capacity of 170 MGD dry weather flow and 340 MGD wet weather flow.

Numerous structural elements have deteriorated over time, leading the NYCDEP to commission site investigations to assess interior structural components, underlying caissons, and drainage systems to inform future repair designs. EnTech’s VDC team conducted extensive laser scanning using Light Detection and Ranging (LiDAR) technology then developed existing conditions BIM of the facility encompassing structural, architectural, mechanical, and drainage systems. The environmental team performed a preliminary hazardous materials inventory and investigation of the roof deck drainage system and expansion joints. EnTech engineers additionally performed on-site assessments of structural components and electrical systems throughout the facility.