Spanning 8.1 miles (13.0 km) in rural Millard County, it connects the Intermountain Power Plant with U.S. Route 6 south of Lynndyl.

Starting at the main gate of the Intermountain Power Plant in rural Millard County, State Route 174 travels straight in a west-southwest direction for about 8 miles (13 km) along Brush Wellman Road through the Sevier Desert before ending at its intersection with U.S. Route 6.

[2] This coincided with the construction of the Intermountain Power Plant, which commenced in 1981, and began commercial operation in 1986.

[4] Before 1969, this was part of the much longer Utah State Route 215.

The entire route is in rural Millard County, Utah.