State Route 274 is a state highway

State highway

State highway, state road or state route can refer to one of three related concepts, two of them related to a state or provincial government in a country that is divided into states or provinces :#A...

 completely within Parowan

Parowan, Utah

Parowan is a city in and the county seat of Iron County, Utah, United States. The population was 2,790 at the 2010 census.Parowan became the first incorporated city in Iron County in 1851. A fort that had been constructed on the east side of Center Creek the previous year was an initial in the...

 in the southernwestern portion of the U.S. state

U.S. state

A U.S. state is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the official title of...

 of 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...

 that connects SR-143

Utah State Route 143

State Route 143 is a state highway in the U.S. state of Utah. The entire highway has been designated the Brian Head-Panguitch Lake Scenic Byway as part of the Utah Scenic Byways program...

 with I-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...

. The entirety of the highway is routed along Main Street.

Route description

The route proceeds north along a two-lane undivided highway from the intersection of Center Street (SR-143) and Main Street in the middle of Parowan in Iron County

Iron County, Utah

As of the census of 2000, there were 33,779 people, 10,627 households, and 8,076 families residing in the county. The population density was 10 people per square mile . There were 13,618 housing units at an average density of 4 per square mile...

. The road exits the center of Parowan and passes the Parowan Airport before terminating at a diamond interchange

Diamond interchange

A diamond interchange is a common type of road junction, used where a freeway crosses a minor road. The freeway itself is grade-separated from the minor road, one crossing the other over a bridge...

 at exit 78 on I-15.

History

With the construction of I-15 around Parowan imminent, SR-1 was moved from old US-91 to the proposed bypass in 1968. SR-143, which had ended at SR-1 (Main Street) in Parowan, was extended north on Main Street and a planned connection to I-15 at exit 78. However, plans had changed by the time I-15 was completed in 1975, and a second interchange (exit 75) served the west side of Parowan. SR-143 was instead rerouted south and west to meet I-15 there, and what had become part of SR-143 in 1968 was instead redesignated SR-274.

Major intersections

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