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2020 Eugene Wastewater Master Plan Chapter 5: Rehab of Existing Systems 41 <br />Chemical grout sealing performs best <br />in deep lines with elevated ground <br />water conditions that do not allow <br />the grout to dry out. It is the least <br />costly rehab method but does not <br />provide any structural improvement <br />to the pipeline. This method of rehab <br />is best utilized for portions of the <br />system difficult to access by other <br />means, and costs vary significantly <br />based on depth, size and the number <br />of locations included in the contract. <br />Table 5-2 shows the estimated unit <br />cost for the primary method of <br />construction, cured-in-place pipe, (or <br />CIPP). This method of rehabilitation <br />not only provides a continuous, <br />unjointed segment of pipe between <br />manholes, but it performs as a <br />structural improvement to the host <br />pipe. <br /> <br /> <br /> <br /> <br /> <br />Public Lateral Rehabilitation Costs <br />Public laterals extend from the wastewater main to the property line. The primary method used to <br />rehabilitate laterals in Eugene is CIPP lining. At 2019 prices, an average lateral (length 30 feet) costs about <br />$4,500 to CIPP line, which includes engineering costs. <br />Manhole Rehabilitation Costs <br />Manholes are generally constructed with concrete and are therefore a potential source of <br />inflow/infiltration as they age. The primary method used to rehabilitate manholes and restore their <br />ability to protect against infiltration is grout sealing. At 2019 prices, sealing a manhole costs $225/vertical <br />foot and costs $500 to seal the channel. <br />Long-Range Rehabilitation Planning <br />As of 2019 there were approximately 717 miles of public wastewater lines. Of this approximately 202 <br />miles of pipe were 50 years or older, without any type of rehabilitation performed on them, as shown in <br />Table 5-1 and Table 5-3. <br />Table 5-2: Estimated Construction Costs for Wastewater <br />Rehabilitation Using Cured-In-Place Pipe (CIPP) <br />Existing Wastewater <br />Diameter <br />CIPP 1 <br />($/foot) <br />Wastewater <br />Reconstruction 2 ($/foot) <br />6” $129 $138 <br />8” $132 $154 <br />10” $134 $168 <br />12” $136 $187 <br />15” $141 $199 <br />18” $154 $254 <br />21” $165 $284 <br />24” $219 $295 <br />27” $251 $347 <br />30” $280 $401 <br />36” $325 $467 <br />42” $390 $542 <br />48” $447 $666 <br />54” $526 $786 <br />60” $730 $894 <br />66” $803 $908 <br />72” $958 $917 <br />Note: 2019 construction costs: ENR = 11281 <br />1 CIPP costs includes replacing and reconnecting the service line <br />to the ROW. <br />2 Wastewater reconstruction includes pavement removal and <br />replacement. Costs shown are for a typical average depth <br />based on the size of the pipe. Detailed reconstruction cost <br />information is included in Chapter 6.