The Atlanta City Council on Monday approved $130 million for airport generators in the wake of a massive blackout in December.

The generators would power the entire airport in the event of another full outage, according to officials at Hartsfield-Jackson International Airport. Short-term financing will pay for the generators, which will ultimately be covered by airline rent payments, the airport says.

The generators are expected to take two-and-a-half years to get approvals, carry out the contracting process and install.