YABUCOA, Puerto Rico (AP) - The Army Corps of Engineers is ending its work to rebuild Puerto Rico's electric grid, despite residents' fears that the island's government won't be able to restore power on its own to more than 16,000 people who remain blacked out eight months after Hurricane Maria.

The federal agency will keep operating more than 700 generators on the island.

But on Friday the restoration of thousands of miles of downed power lines will be handed back to the U.S. territory's bankrupt public utility.

The Corps took over power restoration efforts in Puerto Rico on Sept. 30 after PREPA failed to call in mainland utility companies under a disaster response plan known as mutual aid, in which power companies from around the U.S. send staff to help stricken areas.

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