project is small, but in tonight's signature segment, newshour weekend special correspondent mike taibbireports, it could have large implications. >> reporter: at ground level, in their outsized elegance, they looked like the components of some futuristic space complex. but in fact they're the blades that will spin atop america's first offshore wind turbines. this demonstration project, a decade in the making, borrows renewable energy technology from land-based wind farms and takes that technology out to sea in a patch of the atlantic ocean off tiny block island, rhode island. jeff grybowski is the ceo of the company behind the project, deepwater wind. >> we lift all this equipment about 450 feet up in the air and bolt together. >> reporter: and these are, like, 25 tons apiece? >> 29 tons, each blade. each is about 241 feet long. >> reporter: rhode island governor gina raimondo came to the port of providence to take"" victory lap." >> it means a cleaner source of energy. ultimately, it means a lower cost of energy. i love that. i love it when rhode island is the first. >> reporter: the f