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<br /> <br /> <br />City of Pleasanton, CA (0012108.00) 1-4 Woodard & Curran, Inc. <br />Pleasanton Long-Term Sewer CIP October 6, 2025 <br />1.3.1 Sewer Collection Pipelines <br />As described in section 1.3, the City’s sewer system consists of approximately 258 miles of pipes. These <br />pipes include gravity sewer pipes, sewer siphons, and force mains. Gravity sewer pipes make up the majority <br />of the collection system (~98% of the system), with force mains located downstream of the City’s 11 lift <br />stations, and siphons located at Creek/Arroyo or highway crossings. A summary of gravity sewer pipe <br />materials, ages, and diameters are included below in Tables 1 through 3. Additional information on the <br />City’s 8 siphons is shown in Table 1-1, and information on the City’s force mains are shown in Section 1.3.2 <br />Table 1-6 since they are all associated with one of the City’s lift stations. <br />TABLE 1-1: GRAVITY PIPELINE INFORMATION BY PIPE SIZE <br />Diameter, inches Number of Line <br />Segments <br />Pipe Length, linear <br />feet <br />Portion of Sewer <br />System, % <br />4 65 3,493 0.30% <br />6 1025 138,922 10.89% <br />8 4558 906,586 70.22% <br />10 461 102,040 7.95% <br />12 137 26,999 2.25% <br />14 6 898 0.01% <br />15 173 43,206 3.41% <br />16 3 327 0.02% <br />18 87 20,017 1.64% <br />21 18 5,845 0.47% <br />24 44 10,451 0.91% <br />27 52 16,275 1.17% <br />30 21 5,750 0.44% <br />33 9 2,530 0.23% <br />42 1 63 0.00% <br />Unknown 3 697 0.07% <br />Total 6,663 1,334,297 100% <br />Total Miles 252.7 <br /> <br /> <br /> <br /> <br />Page 214 of 323