Iowa Highway 4

Iowa Highway 4
Iowa 4 highlighted in red
Route information
Maintained by Iowa DOT
Length:	146.343 mi[1] (235.516 km)
Existed:	January 1, 1969 (1969-01-01) – present
History:	1920–1968: Iowa 17
Major junctions
South end:	Iowa 44 / CR P28 at Panora
	US 30 at Jefferson US 20 near Rockwell City US 18 at Emmetsburg
North end:	MN 4 north of Estherville
Location
Counties:	Guthrie Greene Calhoun Pocahontas Palo Alto Emmet
Highway system
Iowa Primary Highway System Interstates U.S. State Secondary Scenic ← Iowa 3 Iowa 5 →

Iowa Highway 4 (Iowa 4) is a state highway which runs from north to south across the state of Iowa. It is 146 miles (235 km) long, beginning at an intersection with Iowa Highway 44 in Panora and ending at the Minnesota state line north of Estherville. It continues north as Minnesota State Highway 4. The route was created on January 1, 1969, when several route designations were changed to match other states' route numbers. Before 1969, Iowa 4 was known as Iowa 17.

Route description

Iowa Highway 4 begins at Panora at Iowa 44. It goes north and is briefly overlapped with Iowa Highway 141 north of Yale. It continues north until Jefferson, where it intersects U.S. Route 30 (US 30). It goes north, then turns west to enter Churdan, then turns north until meeting Iowa 175. At Iowa 175, the highway turns west, with Iowa 175, passing through Lohrville. It turns north west of Lohrville, and continues north through Rockwell City, where it intersects US 20.

Iowa 4 along Broadway in Emmetsburg

After a short concurrency with US 20, Iowa 4 continues north, and intersects Iowa 7. They overlap through Pomeroy, then Iowa 4 goes north through Pocahontas, which is where it intersects Iowa 3. North of Pocahontas, Iowa 4 meets Iowa 10 east of Havelock before passing through Mallard. Iowa 4 then goes north into Emmetsburg, where it meets US 18.

Iowa 4 and US 18 continue west of Emmetsburg together, then Iowa 4 turns north to go through Graettinger. Iowa 4 then turns slightly northwesterly to go through Wallingford, before meeting Iowa 9 in Estherville. Iowa 4 then goes northeasterly out of Estherville before ending at the Minnesota border.

History

Iowa 4 was created on January 1, 1969, during an effort by the Iowa State Highway Commission (IHC) to renumber Iowa's state highways. The goal of the effort was to reduce confusion among drivers crossing into Iowa from other states by aligning Iowa's route numbers with their adjoining routes in other states.^[2] However, most of the route on which Iowa 4 is now applied has been in the primary highway system since it was created in 1920.^[3]

At its designation, Primary Road No. 17 was a much longer route than Iowa 4 is today. Primary Road No. 17 began in Albia at Primary Road Nos. 8 (now US 34) and 59 (now Iowa 5) and headed northwest through Knoxville and Des Moines. It continued west and north by passing through Adel and Perry before turning more northerly at Jefferson. It entered Rockwell City, Pocahontas, Emmetsburg, and Estherville. It ended at the intersection of Primary Road Nos. 4 (now US 71) and 9 in Spirit Lake.^[3]

In 1926, when the U.S. Highway System was introduced, Iowa 17 was shortened on both ends. A service bulletin from the IHC in late 1925 listed Iowa 17 would begin in Jefferson and follow the same route to Estherville.^[4] However, maps published the highway commission in 1927 show the route extended south to Adel ending at US 6.^[5] By 1931, it had been extended north to the Minnesota state line along what was then Emmet County Road H (CR H).^[6][7]

Ten years later, the southern end of the route shifted west to its current in end Panora, replacing Iowa 150 in its entirety. The sections that were duplicate routes with US 30, US 169, and Iowa 141 were removed, while the standalone section between Grand Junction and Perry became part of Iowa 144.^[8] Over the next 28 years, sections of Iowa 17 were straightened and the paving of the route was completed.^[9]

As of 2011, construction of a new four-lane expressway for US 20 has caused a portion of that route to be rerouted onto Iowa 4. The expressway begins eastbound at Iowa 4 and extends across the rest of the state to Dubuque.^[10]

Major intersections

County	Location	mi[1]	km	Destinations	Notes
Guthrie	Panora	0.000	0.000	Iowa 44 (Main Street) / CR P28 (Southeast 3rd Street)
	Richland Township	10.251	16.497	Iowa 141 east	South end of Iowa 141 overlap
		10.697	17.215	Iowa 141 west	North end of Iowa 141 overlap
Greene	Jefferson	24.004	38.631	US 30
Calhoun	Reading Township	44.908	72.272	Iowa 175 east / CR P13 north	South end of Iowa 175 overlap
	Calhoun Township	53.789	86.565	Iowa 175 west	North end of Iowa 175 overlap
	Twin Lakes Township	67.449	108.549	US 20
	Butler–Sherman township line	72.180	116.162	Iowa 7 east / CR D15 west	South end of Iowa 7 overlap
Pocahontas	Bellville–Colfax township line	77.106	124.090	Iowa 7 west / CR C66 east	North end of Iowa 7 overlap
	Pocahontas	87.078	140.138	Iowa 3 (Elm Street South)
	Havelock	93.617	150.662	Iowa 10 west (Cummins Road)
Palo Alto	Emmetsburg	113.358	182.432	US 18 east (Main Street)	South end of US 18 overlap
	Emmetsburg Township	118.026	189.944	US 18 west	North end of US 18 overlap
Emmet	Estherville	138.132	222.302	Iowa 9 (Central Avenue)
	Ellsworth Township	146.343	235.516	MN 4
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus

References

External links

Route map: Bing

• The Iowa Highways Page by Jason Hancock