Description: The HRSD Northshore Siphon Chamber Rehabilitation was a DEQ consent order project for HRSD with a defined completion date. The work consisted of the rehabilitation of brick and precast structures, including siphon chambers, and manhole structures of various diameters, sizes, and depths. This project posed several challenges. The greatest one being a 5-sided structure located on Railroad Ave in the main thoroughfare of the Port of Virginia. The structure was dilapidated beyond the point of rehabilitation. Furthermore, due to the location of the structure relative to existing utilities, heavy traffic, and rail activities it was physically impossible to replace the structure entirely using the traditional precast approach. It was evident the structure not only had to be poured in place, but it also had to be cured quickly and effectively to prevent delays within the Port due to its location. Perplexed by the obstacle at hand, leadership began brainstorming solutions. After much debate, ECI in collaboration with Warren Environmental developed a new all-epoxy cement mixture that consisted of Warren Environmental’s 501-UVR and gravel. Traditional concrete mixtures require a 28-day cure andextensive bypassing/ line stops when poured in place. This new mixture however allowed ECI to pour the structure in place with a cure time of less than 10 days. With our help HRSD and the Port of Virginia were able to save time and money rehabilitating this structure. As a result, it is expected that this manhole will maintain its structural integrity for a minimum of 75+ years despite the environmental challenges imposed on it given its location.