Will Schmitt, THE PRESS DEMOCRAT
Nearly two months after the Kincade fire was fully contained in northeastern Sonoma County, Santa Rosa is struggling with an after-effect of the massive blaze: its wastewater disposal pipeline at The Geysers was disabled for six weeks, backing up the Sebastopol-area plant with about 400 million gallons of treated wastewater.
As a result, by February city water officials anticipate nearing maximum capacity at the plant’s storage ponds, forcing them to release treated effluent into the nearby Laguna de Santa Rosa, a step that would put customers on the hook for an estimated $400,000 in environmental charges.
The wastewater quandary is one of the lingering repercussions of the county’s largest ever wildfire, which scorched about 77,000 acres and more than 170 homes after igniting near a faulty PG&E transmission line in late October.
A clearer picture of its impact on The Geysers geothermal field — the complex of power plants near where the fire erupted — and the city’s wastewater system, which sends most of its recycled daily output to The Geysers, emerged over the past several weeks in public records and in interviews with city water staff and representatives of PG&E and Calpine, which operates most of the power plants.
PG&E has restored power to most of the lines that went down due to the Kincade fire, but it is still weeks away from reactivating the transmission line where equipment broke shortly before the start of the wildfire, a PG&E spokeswoman said.
That same high-voltage line previously powered the city-owned pumps that deliver water about 40 miles from Santa Rosa’s Laguna Wastewater Plant to The Geysers as part of the city’s wastewater disposal system, in operation since 2003.
Without electricity from that line, Santa Rosa found itself sidelined for six weeks — without the ability to pump the 15 million gallons of wastewater it regularly sends per day on average to help sustain steam power at The Geysers, said Joe Schwall, the city’s deputy director of water reuse operations. The Laguna Road plant is one of the largest sewer operations in the North Bay, serving more than 200,000 people not just in Santa Rosa but in Rohnert Park, Cotati, Sebastopol and parts of Sonoma County.