[2] Prior to the construction of the Jordanelle Reservoir, the highway continued north concurrent with the former alignment of US-40 that is now under water.

Prior to the completion of Interstate 80 in eastern Utah US-189 formed the main streets of Coalville and other communities now bypassed by I-80.

US 189 continues north, eventually following the western shore of Fontenelle Reservoir and passing Names Hill before entering La Barge, passing what is left of the Moondance Diner, which was moved to the town from New York City in 2007, and is famous from many movies and television shows.

The route then continues north along the Green River towards the neighboring towns of Big Piney and Marbleton.

Continuing north, the road traverses increasingly mountainous terrain, entering the Bridger-Teton National Forest and passing through the small community of Bondurant before descending through the narrow Hoback River Canyon to an intersection with US 26 and rejoining its parents route, US 89 at Hoback Junction.

Prior to the construction of the Jordanelle Reservoir, the US-189 designation alternated between two routes between Hailstone and Wanship.

In 1985 the Utah Department of Transportation (UDOT) began plans to relocate US-40 and US-189 to prepare for the construction of the Jordanelle Reservoir.

On January 18, 1990 the Federal Highway Administration sent a letter to UDOT recommending that US-189 not be moved to this new alignment.

US-189 remains unsigned on the I-80 concurrency between Silver Creek Junction and the Wyoming state line.