Until now, the plan to power American cities by erecting thousands of giant wind turbines in the oceans off the United States has mostly been an East Coast vision. Developers are busy studying the outer continental shelf and awaiting — or recently celebrating — federal permits to put wind farms from Maine to North Carolina. The West Coast has lagged behind as the Biden administration pursues its ambitious goal of producing 30 gigawatts of electricity from offshore wind by 2030. The main reason has been geography. The deeper coastal waters of the Pacific make these costly construction projects even more difficult. And the U.S. military’s frequent use of the Pacific for training and maneuvers has been a complicating factor.

But the Biden administration and California Gov. Gavin Newsom (D) announced on Tuesday that they plan to push ahead with West Coast offshore wind by designating two areas off the California coast for future wind energy development. If wind farms in these areas ultimately get approved in coming years they would be the first of their kind on the West Coast.

One area chosen for wind development is a 399-square mile patch of Pacific Ocean northwest of Morro Bay, on California’s central coast. Biden administration officials said that area could support 3 gigawatts of electricity. The second area is known as the Humboldt Call Area in Northern California near the Oregon border that could support 1.6 gigawatts of wind power. Together these future projects could power 1.6 million homes, officials said.

“This is a big deal. And we’re looking to scale this vision,” Newsom told reporters.

He also cast offshore wind as a boon for environmental justice — contrasting it with other types of power plants often built near “communities that are traditionally underserved.”

“This is a game-changing energy production facility that would impact nobody 20 miles off the coast of California,” Newsom said. “Clean, green energy, not impacting diverse communities but benefiting diverse communities all up and down the state of California.”

Unlike the East Coast turbines that will be affixed to the seafloor, the deeper Pacific waters would require floating turbines, a less-developed technology. The first floating wind farm, off the coast of Scotland, began producing electricity in 2017.

“The clutter from the return of all those spinning blades can cause lost targets and false targets for the radar,” Sample said in a recent interview.

Colin Kahl, the undersecretary of defense for policy, said on Tuesday that after extensive negotiations the Defense Department was able to support wind development in these areas of California, particularly because “the world faces a grave and growing climate crisis.”

“I think we got to a place where we think that any negative effects were mitigated and certainly balanced against the imperative of moving in a clean energy direction,” he said. “We at the Defense Department are satisfied that there’s not a trade-off between the clean energy goals of this endeavor and our military readiness.”

The Interior Department plans to host a meeting next month of a government task force to discuss the California wind energy plan. A sale of leasing rights to developers is targeted for mid-2022.

There are two pilot offshore wind farms operating in the United States — one in Rhode Island, one in Virginia — that combined have seven turbines and produce 42 megawatts of electricity, a tiny fraction of Biden’s 2030 goal.

This month, the Biden administration approved the first large-scale offshore wind farm in the country off Martha’s Vineyard, Mass. The Vineyard Wind project is scheduled to be built in 2023 and 2024 and is expected to have up to 84 turbines, enough to power 400,000 homes, according to company officials.