The power company NRG will need a few extra months to demolish the old Encina Power Station on Carlsbad Boulevard, but the work will start on schedule and there’s no chance of preserving the plant’s signature seaside smokestack, officials said.

The Carlsbad City Council on Tuesday unanimously approved an extension of up to nine months to complete the demolition. Under an agreement NRG signed with the city in 2014, work was required to begin this December and be finished in two years.