Admin Order 58-20-26 - Laserfiche WebLink

Home Browse Search

2020 Eugene Wastewater Master Plan Chapter 6: Basis of Cost Estimates 50 WASTEWATER PRESSURE LINES Estimated construction costs for wastewater pressure lines are shown in Table 6-5. These costs were developed by updating the ENR index from the 1992 Master Plan to the 2019 index of 11281 and reviewing and comparing the values with recently bid projects. Costs are shown for two construction conditions: 1) in paved street areas, which require imported granular backfill material and pavement removal and restoration; and 2) in open areas, where surface restoration and utility conflicts are a minimum. Both conditions assume minimum trench depth with three feet of cover above the top of pipe. The types of pipe material assumed for the various sizes are: Pipe Size/Range Type of Pipe Material 6-inch to 27-inch PVC 30-inch and larger Concrete-encased steel Table 6-5: Estimated Construction Cost for Wastewater Pressure Lines (Force Mains) Pipe diameter (inches) Estimated construction cost (per foot) In paved areas2 In open areas1 6 $66 $43 8 $76 $53 10 $93 $65 12 $108 $75 14 $156 $114 16 $169 $125 28 $255 $194 30 $271 $210 36 $417 $341 42 $507 $425 72 $899 $786 Notes: ENR =11281 1 Costs assume 3-foot depth of pipe cover, with imported granular backfill above the pipe zone area and minimal surface restoration or utility conflicts. 2 Costs assume 3-foot depth of pipe cover, with imported granular backfill above the pipe zone area and removal and restoration of pavement in trench area. ADDITIONAL INFORMATION The estimated construction costs included here are for high-level planning purposes. All construction costs are influenced by the economy, time of bidding, difficulties of the specific project, and time allowed for construction. Consideration of all factors should be included when preparing project-specific estimates.