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Case Study: Merrill Street Combined Sewer Rehabilitation

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The City of Indianapolis operates an extensive sewer collection system to serve the metropolitan area. As sewers near the wastewater treatment plants, they grow larger in diameter and are more critical to operation. In the summer of 2007, Wessler Engineering was tasked with designing a solution for a portion of the Pogues Run Relief Interceptor (hereinafter known as the Merrill Street Sewer), which is a critical large diameter combined sewer in the heart of downtown Indianapolis.

The City’s concern for this particular sewer was twofold: first, it was approaching 60 years in age and had experienced a number of operational issues, and second, that it could limit capacity for the main campus of Eli Lilly & Company, the City’s largest and most visible taxpayer. Wessler’s job was to put a new sewer in place that would increase capacity and extend the service life, while limiting cost and construction disturbance.


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