Updated Thursday, 11 a.m.
If you’ve walked or driven over the Rachel Carson Bridge today, you may have wondered: what are those spinning things?
They’re mini wind turbines that crews are installing as part of Light Up Night, the city’s annual winter celebration.
The project, called “Energy Flow,” was created by artist Andrea Polli and Ron Gdovic of WindStax, a local wind turbine and energy company. Wind from 16 turbines will generate electricity for Pollis’ LED light installation, according to Riverlife.
This isn’t Pollis’ first outdoor installation in Pittsburgh, the Post-Gazette noted earlier this year. She was also behind “Particle Falls,” a light projection that visualized air quality data in realtime.