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Plant 5 Flowmetering The challenge Client The Town of West Seneca owns, operates, and maintains its sanitary Town of West Seneca sewer collection system. Most flow from the system is conveyed to the Buffalo Sewer Authority (BSA) collection system where a wastewater Location treatment plant used to exist (Plant 5). Under the previous configuration, the majority of flow was monitored using a Parshall West Seneca, New York, USA flume (District 13) while the another area (District 5) was not monitored at all. Parshall flumes require strict upstream water level control to accurately measure flows. To do this, the system was designed with enough weir length to limit water levels to less than an inch above the weir. This issue was compounded by tree roots that regularly block the 36-inch interconnection and create a constant backwater on the flume. This effectively created a situation where overflows were frequent and the flume was reporting that the maximum flow was being conveyed to BSA in dry weather. Our response Multiple issues needed to be addressed to optimize the site. This included monitoring District 5, removing backwater on Plant 5 to reduce overflows, and accurately monitoring flows in a way that is not sensitive to downstream conditions. This required reconfiguring the site. The Power of Commitment Page 172 of 301