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3.1.1 Existing Sanitary Sewer Condition <br />The evaluations provided in this report are based on field inspections, <br />construction as-built drawings, and discussions with city staff. The <br />condition of the sewer collection system was evaluated using previous <br />closed circuit televised (CCTV) inspection records. The lift station was <br />evaluated for pumping performance. A pump down test was performed <br />at the site to estimate the pumping capacities. This data was then <br />compared to the rated capacities. Based on this information, the lift <br />station has the capacity to continue serving its area where it is located. <br />3.1.2 Sewer Flow Quantification <br />Projected flows for the sanitary sewer system were estimated using <br />historical sanitary sewer flows and population projections provided by <br />MCES. The amount of sanitary sewer measured by MCES in 2005 was <br />recorded as 240.85 MG. The population of the City in 2005 was <br />estimated by MCES to be 5800. <br />Table 2 summarizes the project sanitary sewer flows for the City for up <br />to the year 2030. <br />Table 2 -Sanitary Sewer Flow Projections <br />~t t' d ~ ~ 1~'q!!~~'' Y~li~ ~ iC ~t $yttl l~~~ `p~fffi l1 `~I~~~~ (y ~i 11+~$.., <br />i ~ ~.k,~ .~6f:.~~i~ ~ it ~~n~i'V ~I!'gI~F' I i~t(lS II'lll Ii I :~ a. <br />Sewered Population 6,100 6,100 6,100 • <br />Sewered Households 2,350 2,400 2,500 <br />Sewered Employment 3,900 4,050 4,200 <br />Average Annual Wastewater Flow (MGD) 0.91 0.89 0.88 <br />Allowable Peak Hourly Flow (MGD) 2.91 2.85 2.82 <br />3.1.3 Existing and Potential Sanitary Sewer Related Issues <br />3.1.3.1 Sanitary Sewer Collection Svstem <br />Previous CCTV inspection documents were reviewed to determine the <br />condition of the sanitary sewer at the time of the inspections. It is <br />possible that additional deficiencies exist in the system today would need <br />to be addressed in the short-term. The City is currently televising the <br />entire sanitary sewer collection system. This section should be updated <br />following completion and review of data from the CCTV effort. <br />Deficiencies and defects identified include mid-segment sags in excess <br />of 4-inches, offset pipe joints, and significant joint separation. These <br />types of defects can severely impact the capacity and structural integrity <br />of the collection system and should be addressed. The locations of <br />these defects are shown in Figure 8, on the following page. <br />• <br />TComprehensive Plan UpdateT <br />City of Falcon Heights <br />AFAL000701.00 <br />Page 16 <br />