Council adopts 2025 Wastewater Collection System Master Plan and updates CIP

The Redmond City Council adopted Ordinance 2025-15 to accept the 2025 Wastewater Collection System Master Plan as a supporting plan to the 2040 comprehensive plan. Jessica McClanahan, director of public works and city engineer, told the council the plan replaces a 2007 master plan and is grounded in Redmond-specific flow monitoring and an updated hydraulic model.

Staff ran three growth scenarios — a 20-year planning horizon, buildout of the urban growth boundary (UGB), and UGB buildout plus additional densification tied to House Bill 2001 — to test capacity. McClanahan said the plan found relatively few capacity deficiencies under the 20-year and UGB scenarios but identified spot upgrades on Highway 126 west and several pump-station improvements tied to anticipated development in the large-lot industrial area.

The plan’s 20-year capital improvement program totals about $66 million: roughly $2 million in short-term projects (years 0–5), about $45 million in mid-term (years 6–10) projects to extend interceptors and enable phased development, and approximately $19 million in long-term projects (years 11–20) including wrap collectors and a new pump station. Staff said they will follow with an SDC methodology update later in the year to align fees with the revised CIP.

Councilors voted to approve the ordinance by roll call. Staff said the hydraulic model and updated CIP will be used for future development reviews and system planning.