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Monitoring District 5 was instituted by installing an The impact area-velocity flowmeter in one of the manholes The new flowmeters are reporting significantly less flows upstream of the interconnection. Good hydraulics are than the Parshall flume was reporting, which reduced needed to capture accurate flow data, so the nearby sewer use costs to BSA. Preventing tree root incursion sewers were lined and the manhole was rehabilitated and allowing for less water level control has also reduced to include a proper manhole bench so that flow overflows, which has improved water quality of would stay confined to the trough and the meter Cazenovia Creek. wouldn’t provide poor data created by turbulence. District 13 metering was improved by demolishing the Parshall flume and replacing it with an Accusonic multipath flowmeter. This improved metering by allowing for direct velocity measurements at multiple points in the pipe cross-section and calculating flow based on water depth, cross-sectional area of each path, and path velocity. The overflow was moved to upstream of the flowmetering chamber to limit water levels during emergency situations and prevent flooding of nearby property. GHD incorporated flow and water depth measurements into the Town’s SCADA system to allow for real-time monitoring of Plant 5. The intent for this is operations personnel can identify when the downstream sewer needed clearing so that unnecessary overflows could be prevented. The downstream interconnection was lined by the Town in Phase 8.5 of their sewer system improvements to prevent tree root incursion. ghd.com Page 173 of 301