Iowa Highway 146

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Iowa Highway 146 marker

Iowa Highway 146
Route information
Maintained by Iowa DOT
Length: 42.735 mi[1] (68.775 km)
Existed: ca. 1926 – present
Major junctions
South end: US 63 / Iowa 102 in New Sharon
North end: US 30 / CR T37 in Le Grand
Highway system
Iowa 144 Iowa 148

Iowa Highway 146 is a state highway in central Iowa. It runs in a north–south orientation and is 43 miles (69 km) long. Iowa 146 begins at an intersection with U.S. Route 63 at New Sharon, and ends at a freeway interchange with U.S. Highway 30 at Le Grand. While the route Iowa 146 takes has remained the same since its creation, the highway has been extended at least twice because of realignments of U.S. Route 30 near Le Grand. The northernmost 2 miles (3.2 km) were once part of the Lincoln Highway.

Route description[edit]

Iowa Highway 146 beings in the city of New Sharon at the corner of Main Street and Market Street. U.S. Route 63 comes from the south along Main and turns east onto Market. Iowa Highway 102, existing only within New Sharon, but formerly extending to Pella, heads west on Market. Iowa 146 travels north on Main. Two miles (3.2 km) north of New Sharon, Iowa 146 crosses a Union Pacific Railroad line and into Poweshiek County shortly thereafter.[2] Highway 146 heads north for 4 12 miles (7.2 km) before curving west towards Searsboro.[1] At Searsboro, Iowa 146 crosses the UPRR line again and turns to the northwest at the eastern end of former Iowa Highway 225, which was turned over to Poweshiek County and Jasper County in 2003.

For two miles (3.2 km), Iowa 146 heads northwest; then, it turns due north towards Grinnell. Just south of Grinnell, Highway 146 meets Interstate 80 at a diamond interchange. Three miles north of I-80, Iowa 146, now along West Street in Grinnell, intersects U.S. Route 6, which runs along 6th Avenue. Eight miles (13 km) north of Grinnell, Iowa 146 enters Tama County, but only briefly. It turns west and enters Marshall County 2 12 miles (4.0 km) later, just east of Gilman. Highway 146 turns north on Elm Street in Gilman. From Gilman, it is an 8 12-mile (13.7 km) drive to Le Grand where Iowa 146 ends at Main Street. Prior to US 30 being relocated to the north along an expressway, Main Street carried US 30.


Iowa Highway 146 was designated along Primary Road No. 63.[3] When the U.S. Highway System was created in 1926, the Iowa State Highway Commission had a policy of renumbering state highways to avoid duplicating U.S. Highway numbers; US 63, in this case.[4] Iowa 146 has been extended northward at least twice. A 2-mile (3.2 km) section of the Lincoln Highway[3] became a part of U.S. Route 30 was straightened between Tama and Marshalltown.[when?]

Major intersections[edit]

County Location mi[1] km Destinations Notes
Mahaska New Sharon 0.000 0.000 US 63 (S. Main Street) / W. Market Street – Pella, Montezuma, Oskaloosa
Poweshiek Grinnell 18.507 29.784 I-80 (Exit 182) – Des Moines, Davenport
21.952 35.328 US 6 (6th Avenue)
No major junctions
Marshall Le Grand 42.735 68.775 Beane Street (CR T37) / Main Street Roadway continues as Beane Street; Main Street is the former US 30 alignment
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ a b c "2009 Volume of Traffic on the Primary Road System of Iowa" (PDF). Iowa Department of Transportation. January 1, 2009. Retrieved January 19, 2011. 
  2. ^ Iowa Department of Transportation (July 1, 2008). "Iowa State Railroad Map" (PDF). Retrieved March 3, 2010. 
  3. ^ a b Junior Road Map: Iowa (Map). Rand McNally. 1926. Retrieved March 3, 2010. 
  4. ^ "Rules of the Road:Highway Safety". Iowa Pathways. Iowa Public Television. 2005–2009. Retrieved March 3, 2010. 

External links[edit]

Route map: Google

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