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North County Inline Pump Station Evaluation <br />IRCDUS PID 21-23010 <br />Background <br />Increases in current and anticipated future growth in the north end of the County's service area <br />have resulted in the need to address the replacement of the master lift station for this area, Lift <br />Station 203. In October 2022, Indian River County Department of Utility Services (IRC) requested <br />that Atkins provide technical services to evaluate the option of replacing the existing master <br />pump station, Lift Station 203, with an above -ground booster pump station, Capital Improvement <br />Project Identification Number (PID) 21-23010. Lift Station 203 is located at the decommissioned <br />North Wastewater Treatment Facility (WWTF) and consists of two submersible pumps located in <br />the equalization tank that was part of the abandoned North WWTF. The equalization tank is <br />open to atmosphere, causing major odor issues, and there is concern about the structural <br />integrity of the concrete tank. For these reasons, Lift Station 203 is considered unsuitable for <br />expansion or rehabilitation. Figure 1 shows the existing pump station and tank configuration. <br />Figure 1. Lift Station 203 at the North WWTF <br />IRC would like to replace the deteriorating existing pump station with an in-line above -grade <br />wastewater pump station similar to the configuration of IRC's Lift Station 89. The new pump <br />station will address the increase in pump station capacity as well as the odor issues associated <br />with the current pump station. <br />Lift Station 203 functions as a master pump station, collecting flows from three areas. From the <br />north, there are 59 lift stations that feed into a 24" force main which reduces to a 12" force main <br />1 <br />