Along with submitting a supplemental budget request to the King County Council for up to $65 million for power improvements, Executive Dow Constantine signed an emergency declaration Thursday that enables the Wastewater Treatment Division to quickly purchase services and equipment to provide more reliable on-site power sources at the West Point Treatment Plant Discovery Park in Magnolia.

The Wastewater Treatment Division will work with Seattle City Light on power upgrades. Included in the funding package is $3 million to analyze schedules and cost estimates if high-voltage power lines are needed at West Point. Both agencies are also evaluating the feasibility of more targeted solutions such as a battery storage system, or other power conditioning devices.

West Point treats wastewater from homes and businesses in Seattle, Shoreline, north Lake Washington, north King County and parts of south Snohomish County.

The facility’s maximum capacity is 440 million gallons a day during peak storms, and it requires about 10 megawatts of electricity daily — roughly the equivalent of powering 11,000 single-family homes.

In the past 20 years, the West Point Treatment Plant diverted a highly diluted mixture of stormwater and wastewater into Puget Sound 15 times because Seattle City Light power disruptions caused equipment shutdowns when the plant was operating at or near capacity. More than half of these bypasses — 53 percent — occurred over the past five years.

As climate disruptions become more frequent, West Point is expected to experience more days of maximum flows. In addition, these same climate effects increase the likelihood of disturbances to power facilities.

Constantine’s proposal, sponsored by Councilmember Jeanne Kohl-Welles, includes modifying on-site power generation at West Point and an option to use batteries to help buffer the power supply, allowing plant equipment to continue operating during power disruptions. This work is expected to be completed within 24 months because of the declaration of emergency.