The basin of this river contains the largest-known deposit of trona ore, which is refined into soda ash, a fact which led this river to become the namesake of a soda pop released just after Prohibition by the Sweetwater Beverage Company. After it's joined by the Big Sandy River, it flows through the Fontanelle Reservoir at 
The basin of this river contains the largest-known deposit of trona ore, which is refined into soda ash, a fact which led this river to become the namesake of a soda pop released just after Prohibition by the Sweetwater Beverage Company. After it's joined by the Big Sandy River, it flows through the Fontanelle Reservoir at the town of La Barge. This river shares its name with a city that, in 1931, was the first to prohibit door-to-door solicitation by passing its namesake ordinance. It picks up Nine Mile Creek and Yampa River at Steamboat Rock, after passing through the scenic Gates of Lodore. It also runs through the Flaming Gorge Dam, creating a reservoir when it passes through the Uinta Mountains, and the banks of this river contain the fossil beds of Dinosaur National Monument. For 10 points, name this largest tributary of the Colorado River, which passes through a namesake town in southern Wyoming.