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Council OKs $165,100 WSP contract to update mitigation plan and $61,800 study for South Fork lift station
Summary
The council unanimously authorized a $165,100 contract with WSP to update the city's mitigation operations and monitoring plan for the Centennial Well and approved a $61,800 preliminary design report work order with Gray & Osborne for the South Fork lift station rehabilitation.
The North Bend City Council approved two utility-focused contracts Feb. 17: a professional-services agreement with WSP to update the water mitigation operations and monitoring (O&M) plan and a work order with Gray & Osborne for a preliminary design report on the South Fork lift station.
Public Works staff said the mitigation O&M plan (last updated in 2007) guides how the city calculates daily mitigation requirements and reports Centennial Well use to state and tribal reviewers. Don DeBerg told council the 41-page plan requires substantial behind-the-scenes modeling and data work; the presentation noted the update will incorporate data through 2025 and re-run streamflow and mitigation scenarios. The council authorized a WSP contract not to exceed $165,100 (agenda bill AB 26-021); the work was included in the 2026 budget and the cost assumptions in the rate study.
DeBerg explained the City will send the draft update to the Department of Ecology and to the Snoqualmie and Tulalip tribes for review, and that WSP (formerly Golder) had preexisting models that could be updated for the effort. He said updating the mitigation algorithm could reduce required mitigation volumes and therefore operating cost over the long term.
Separately, staff described deficiencies at the South Fork lift station (pump capacity, ventilation, odor control and standby power) and said three development projects nearing permit stages could push the station beyond its capacity. Gray & Osborne was selected to prepare a preliminary design report (PDR) to lay out options and costs; the council approved a work order not to exceed $61,800 (AB 26-022). That PDR is intended to produce a short list of feasible rehabilitation solutions and order-of-magnitude costs to inform future project and budget decisions.
Both motions passed unanimously. Council members said they valued getting the technical work underway and reiterated the council's earlier direction to use the WSP study to inform rate-model assumptions and to involve affected tribal and state reviewers in the mitigation-plan process.
Next steps include WSP delivering a draft mitigation update for tribal and Ecology review and Gray & Osborne presenting a PDR with options and cost estimates to the council for further approvals.
