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City updates on Weaver lift station, force mains and well commissioning; DNRC water-rights review continues
Summary
Public Works updated the council on the Weaver Lift Station and long force-main installation, explained large concrete vaults and HDPE installation techniques, said the lift station is sized to serve about 22,500 people at full build-out, and reported ongoing DNRC review of municipal water-right documentation; staff also plans to commission well 8 imminently.
Public Works provided a consolidated update on utility projects, including the Weaver Lift Station, force-main construction methods, and recent well developments.
Weaver Lift Station: staff said the lift station will be located near Collins and Weaver and that the installed force main will carry wastewater back to the plant. Staff described the large concrete vaults being installed as air-relief/pressure-relief structures (individual segments weighing tens of thousands of pounds), requiring heavy cranes to set. The lift station design includes a third pipe stub for a future lift station and is sized, at final build-out, to serve about 22,500 people, staff said.
Force mains and installation: staff explained the contractor is installing HDPE force mains by fusing long sections together and rolling them into trenches; the pipe is rated for high pressures (transcript cited a rating up to 150 PSI) though normal operation will be well below that range. Staff emphasized vault placement to minimize future disruption to neighborhoods and to limit potential odor impacts if air-relief events occur.
DNRC and water-rights issues: staff said a previous application to DNRC was denied because DNRC requested full historical verifiable use records on the city's water rights. Staff is preparing a Round 2 submission and watching rulemaking connected to a recent legislative change; the city’s lobbyist team (Central House Strategies) will monitor that rulemaking.
Wells: staff said Well 8 will be commissioned shortly as a redundant well and that Well 9 is expected later this year after wellhead work; staff recorded a per‑transcript rating for Well 8 of "10 50 gallon per minute" in the workshop; staff also discussed deep wells and geologic variations on yield.
Next steps: staff will continue force-main installations this summer, pursue DNRC follow-up on placed-of-use documentation, and proceed with scheduled well commissioning and lift-station construction sequencing. No formal council action was taken during the workshop.
