Utah State Route 51
Encyclopedia
State Route 51 is a short highway completely within Utah County
Utah County, Utah
Utah County is a county located in the U.S. state of Utah. As of 2000, the population was 368,536 and by 2008 was estimated at 530,837. It was named for the Spanish name for the Ute Indians. The county seat and largest city is Provo...

 in northern Utah that connects SR-147
Utah State Route 147
State route 147 is a state highway in the U.S. state of Utah. Spanning , it connects West Mountain and Benjamin in western Utah Valley with I-15, Spanish Fork, and Mapleton on the east side of the valley.-Route description:...

 to US-89. The highway runs for three miles (5 km) and is an old routing of U.S. Route 91.

Route description

The route begins at the intersection of 400 North (SR-147) and Childs Road in Spanish Fork
Spanish Fork, Utah
Spanish Fork is a city in Utah County, Utah, United States. It is part of the Provo–Orem, Utah Metropolitan Statistical Area. The population was 31,497 as of the 2008 census estimate.-History:Spanish Fork was settled by LDS pioneers in 1851...

, SR-51 heading northeast as a two-lane undivided highway on the latter. As the road exits Spanish Fork, it heads into a rural portion of Utah County
Utah County, Utah
Utah County is a county located in the U.S. state of Utah. As of 2000, the population was 368,536 and by 2008 was estimated at 530,837. It was named for the Spanish name for the Ute Indians. The county seat and largest city is Provo...

. The continues northeast until 1600 North south of Springville
Springville, Utah
Springville is a city in Utah County, Utah, United States. It is part of the Provo–Orem, Utah Metropolitan Statistical Area. The population was 20,424 at the 2000 census, while the 2008 estimates placed it at 28,520. Just minutes south of Provo, Springville is a bedroom community for...

, where the road turns north. The road continues north until terminating at a grade-separated intersection with US-89, one of the oldest grade-separated intersections in Utah
Utah
Utah is a state in the Western United States. It was the 45th state to join the Union, on January 4, 1896. Approximately 80% of Utah's 2,763,885 people live along the Wasatch Front, centering on Salt Lake City. This leaves vast expanses of the state nearly uninhabited, making the population the...

.

History

The road from Spanish Fork to Springville (leaving the latter on 800 North) was added to the state highway system in 1910, and in the 1920s it became part of SR-1 (US-91). In 1964, when SR-1 was moved to the newly-completed I-15 in the area, the old route between Spanish Fork and Springville became an extension of SR-156 (which had been created in 1962 as a short connection between old and new SR-1 at exit 257). In 1992, because of safety problems at "Maggie's Bend", where SR-156 turned from 800 North onto Childs Road in eastern Spanish Fork, caused in part by superelevation of the curve, 800 North was given to the city and the state took over Childs Road. This split SR-156 in two (with the original section, serving as a spur since 1964, becoming part of the mainline), and the portion on Childs Road and to Springville became a new State Route 51.

The junction with US-89 at the north end of SR-51 is a grade separated interchange
Interchange (road)
In the field of road transport, an interchange is a road junction that typically uses grade separation, and one or more ramps, to permit traffic on at least one highway to pass through the junction without directly crossing any other traffic stream. It differs from a standard intersection, at which...

 constructed in 1959 (as the split of US-89 and US-91), making this one of the oldest grade separated interchanges in Utah still in use. Although portions of Interstate 15
Interstate 15 in Utah
In the U.S. state of Utah, Interstate 15 runs north–south through the southwestern and central portions of the state, passing through many of the population centers of that state, including St. George, Provo, Salt Lake City, and Ogden, the latter three being part of the urban area known as...

were constructed in 1955, the Beck Street interchange (I-15/US-89) is the only original structure from 1955 still in use.

Major intersections

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