--- title: Longmont WWTP | Project Spotlight image: https://info.watercollaborativedelivery.org/hubfs/Project%20Spotlights/Project%20Spotlight%20Photos/Longmont2%20(2).jpg --- [![WCDA_horz_tag_RGB](https://info.watercollaborativedelivery.org/hs-fs/hubfs/WCDA_horz_tag_RGB.png?width=250&height=129&name=WCDA_horz_tag_RGB.png "WCDA_horz_tag_RGB")](https://www.watercollaborativedelivery.org) # Longmont WWTP Ammonia Treatment and Biosolids Dewatering Improvement **Progressive Design-Build | Carollo Design-Build Goup **   Working closely with the plant operations staff, the Carollo Design-Build Group engineered and constructed a solution that allowed the replacement of existing aeration and clarifiers with minimal disruption to the operation of the facility. ![Longmont2 (2)](https://info.watercollaborativedelivery.org/hubfs/Project%20Spotlights/Project%20Spotlight%20Photos/Longmont2%20(2).jpg) ## Download this project spotlight to learn more: - The impact of progressive design-build's flexibility - Significant cost savings on hauling biosolids away - How the wastewater plant stayed in operation during construction Copyright © 2026 Water Collaborative Delivery Association [Privacy Policy](https://watercollaborativedelivery.org/privacy-policy/)     [mailto:info@WaterCollaborativeDelivery.org](mailto:info@WaterCollaborativeDelivery.org)