Twenty-seven miles off the coast of Virginia Beach, Virginia, stand two offshore wind turbines, each taller than the Washington Monument, generating power for up to 3,000 homes.

In five years, Dominion Energy hopes to be finishing construction of its own ocean skyline — complete with 180 turbines standing roughly 200 feet taller than the pilot project, three underwater power substations, and a deep-sea transmission line to bring that electricity to shore.