LOS ANGELES (AP) — The head of the California Public Utilities Commission recommended Thursday that the agency delay for several months an investigation into soaring costs tied to the damaged San Onofre nuclear power plant.

At issue is who is going to pay a bill that has reached $165 million so far for repairs, inspections and replacement electricity for a plant with crippled steam generators. San Onofre hasn’t produced power since Jan. 31 and it’s not clear when, or if, the twin reactors will return to service.