As assigned by FEMA, the Corps leads the federal effort to repair the hurricane-damaged electrical power grid in support of the Government of Puerto Rico. Working in partnership with the Puerto Rico Electric Power Authority, the Department of Energy and FEMA, the Corps’ priority is to safely restore reliable power to the people of Puerto Rico as quickly as possible. Puerto Rico has about 2,400 miles of transmission lines across the island and 30,000 miles of distribution lines with 300 sub-stations. It is estimated that 80 percent of the grid was affected by two hurricanes which ravaged the island just two weeks apart -- Irma (Sept. 7, 2017 - category 5) and Maria (Sept. 20, 2017 - category 4). As of April 26, 2018, about 97.8 percent of the 1.47 million customers who are able to receive electric power have their service restored.