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Sewage Lift Stations Rehabilitation Project

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Sewage Lift Stations Rehabilitation Project

The City of Astoria has three lift stations along the sewer interceptor route that are critical to conveying sewage around the peninsula to the City's wastewater treatment plant. All three lift stations (numbered 3, 4 and 5) operate Archimedes screw systems that sit within an open chute under a concrete slab cover. These simple and reliable lift stations were built in the mid-1970s. After nearly 50 years of constant operation, the screws need to be replaced, the channels re-surfaced, and the control mechanisms and motors modernized. There is a wide range of seasonal flows that are conveyed to the wastewater treatment plant, ranging from about 1 million gallons per day (MGD) in the dry summer season to 18 MGD during heavy rainstorms in the wet season. As a combined system, the conveyance infrastructure must pass more debris than a typical sewer-only system.

 A complete rehabilitation of these three lift stations is expected to serve our community for at least another 50 years and continue to protect the environment and public health by avoiding overflows into adjacent water bodies. Richwine Environmental completed a Project Definition Report in January 2025. Then in February 2025, City Council approved Resolution 25-05 authorizing the use of the Construction Manager/General Contractor (CM/GC) method of procurement for this project to allow selection of a contractor using criteria that includes the contractor's qualifications and experience in addition to relative costs (in accordance with ORS 279C). In January 2026, the City selected Emery & Sons Construction Group as the CM/GC firm. The scope of the Phase I pre-construction contract involves CM/GC contractor participation in design review and development, cost modeling, risk management, safety planning, value engineering, scheduling, and negotiation of a total price in support of the development and execution of the Phase II contract for construction services.

 The current project schedule estimates Phase I preconstruction services being completed in June 2026. Due to procurement of long lead time materials, most of the construction is anticipated to occur in the summer of 2027.

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