Utah State Route 138

State Route 138
Route information
Defined by Utah Code §72-4-119
Maintained by UDOT
Length:	20.444 mi[1] (32.901 km)
Existed:	1965 – present
Major junctions
West end:	I‑80 near Grantsivlle (exit 84)
	SR‑112 in Grantsville
East end:	SR‑36 at Mills Junction
Highway system
State highways in Utah Interstate • US State (Minor • Parks) Scenic ← SR‑137 SR‑139 →

State Route 138 is a highway,^[2] completely within Tooele County in northern Utah that connects Grantsville to Erda and Stansbury Park. The route runs twenty miles (32 km) and is the old routing of U.S. Route 50 Alternate and U.S. Route 40.^[3]

Route description

From its western terminus at exit 84 of I-80, northeast of the Stansbury Mountains, the route heads southwest (toward the mountain range), reaching the mining operation of Flux, then turns southeasterly. Upon entering the western side of Grantsville, the highway heads east (serving as Grantsville's Main Street) and turns to the northeast after leaving the city. It runs northeasterly until terminating at Mills Junction north of Stansbury Park, at milepost 62.9 of Highway 36.

History

Previous route

When it was first formed in 1933, SR-138 took a similar path to the present-day route, going from Grantsville north to Burmester. This designation was deleted in 1953.^[3]

Current route

The current route of SR-138 was formed in 1965, when SR-2 was moved to the north to reflect the future alignment of then under-construction I-80. The state legislature wanted to keep the old alignment of looping down to Grantsville in the state highway system, so it was re-designated as SR-138. This designation has remained the same since that action.^[3]

Major intersections

The entire route is in Tooele County. ^[4]

Location[4]	mi[1]	km	Destinations	Notes
I-80 exit 84	0.000-0.505		I‑80 – Wendover, Salt Lake City	Western terminus
Grantsville	12.209	19.648	SR‑112 south (800 East)
Mills Junction	20.444	32.901	SR‑36	Eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References