3. AT 9:45 a.m., START: The larger boat is responsible for dyeing the river, which begins when it arrives under the Michigan Avenue bridge near Wacker Drive.
4. KITCHEN SECRET: Three men use flour sifters to dump about 40 pounds of an environmentally friendly orange powder into the river. The fourth drives the boat. The formula of the powder is top secret and it turns bright green when it its the water.
5. POWDER SPREAD: The smaller boat "chases" the larger boat and churns the water, which helps disperse the powder across the river. Traveling the river between Wabash Avenue and Columbus Drive, the large boat snakes across the waterway dumping powder.
6. GREEN SHEEN: It takes about 45 minutes for the river to turn completely green. depending upon which direction the wind is blowing, the water can stay green for up to a few days.
And then, More Green for the Irish. --RoadDog
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