Iowa Highway 175

Iowa Highway 175
	Iowa 175 highlighted in red
Route information
	Maintained by Iowa DOT
Length	221.367 mi[1] (356.256 km)
Major junctions
West end	N-51 west of Onawa
	I-29 at Onawa; Iowa 141 at Mapleton; US 59 at Ida Grove; US 71 near Odebolt; US 169 at Harcourt; US 69 near Jewell; I-35 at Ellsworth; US 65 at Hubbard; Iowa 14 near Grundy Center;
East end	US 63 near Voorhies
Location
Counties	Monona; Woodbury; Ida; Sac; Calhoun; Webster; Hamilton; Hardin; Grundy; Black Hawk;
Highway system

Iowa Highway 175 (Iowa 175) is a main east–west route in the northern portion of the state. The highway has a length of 221 miles (356 km). Iowa Highway 175 enters the state by a Missouri River crossing between Decatur, Nebraska and Onawa. The highway continues westward as Nebraska Highway 51. Iowa 175's eastern terminus is at a T intersection with U.S. Route 63 in southwestern Black Hawk County.

Despite Iowa 175's length, it only passes through small communities. The largest city on the route is Onawa, whose 2000 population was 3,091.

Route description

Iowa Highway 175 begins at the eastern end of the Burt County Missouri River Bridge west of Onawa. At Onawa, it intersects Interstate 29. At Turin, it meets Iowa Highway 37 and turns northeast to follow an alignment which lies next to the Maple River. It continues through Castana and meets Iowa Highway 141 in Mapleton. At Mapleton, Iowa 175 overlaps Iowa Highway 141 through town. This is a wrong-way concurrency, with eastbound Iowa 175 and westbound Iowa 141 routed on one side of the road, and vice versa. It continues northeast from Mapleton through Danbury and Battle Creek and meets U.S. Highway 59 west of Ida Grove. After passing through Ida Grove together with U.S. 59, they separate east of Ida Grove. Iowa 175 passes east through Arthur and at Odebolt, meets Iowa Highway 39. Further east, Iowa 175 meets U.S. Highway 71. Iowa 175 and U.S. 71 run east, then south, then east again concurrently through Lake View and Ulmer before separating at Auburn.

Iowa 175 leaves Auburn going east, then passes through Lake City. After Lake City, Iowa 175 meets Iowa Highway 4. The two highways run concurrently through Lohrville before separating. Iowa 175 then passes through Farnhamville and Gowrie and intersects Iowa Highway 144 before intersecting U.S. Highway 169 at Harcourt. They continue east together before separating before Dayton. After passing through Stratford, Iowa 175 meets Iowa Highway 17 at Stanhope. It leaves Stanhope going east and meets U.S. Highway 69 south of Jewell. They run together going north into Jewell before Iowa 175 turns east. After passing through Ellsworth, Iowa 175 intersects Interstate 35.

Iowa Highway 175 then continues east of I-35 by passing through Radcliffe before meeting U.S. Highway 65 in Hubbard. Iowa 175 and U.S. 65 then go north, then east, together before separating. Iowa 175 then goes east through Eldora and meets Iowa Highway 14 west of Grundy Center. Iowa 175 continues east with Iowa 14 before separating in Grundy Center. It turns slightly southeasterly while passing through Morrison and Reinbeck, then turns east and ends at U.S. Highway 63 south of Hudson.

History

Eldora Viaduct was built over the Iowa River in 1914

Iowa Highway 175 was originally designated in 1930 as a very short spur from U.S. Route 65 to Hubbard but extended west to Stratford by 1937. Iowa 175 extended west to Auburn in October 1940, replacing Iowa 91, a spur route from Dayton to US 169, Iowa 47, a spur route from US 169 to Farnhamville (which had extended west from Gowrie on December 20, 1938), Iowa 287, a spur route from Farnhamville to Iowa 17 (now Iowa 4), and Iowa 188 (which was renumbered from Iowa 151 in 1938), which went from Iowa 17 to Auburn. In January 1948, Iowa 175 extended west to US 75, replacing Iowa 35 and a duplex with Iowa 37 was created; Iowa 37 would be truncated to Iowa 175 on May 11, 1966. By 1955 Iowa 175 had extended westward to Nebraska, replacing Iowa 165. The final segment of Highway 175 was commissioned in 1969, extending the highway eastward from Hubbard to its present eastern terminus.

Major intersections

County	Location	mi[1]	km	Destinations	Notes
Missouri River		0.000	0.000	N-51 west – Decatur, Bancroft	Continuation into Nebraska
Missouri River		0.000	0.000	Burt County Missouri River Bridge; Nebraska–Iowa state line
Monona	Onawa	6.093	9.806	I-29 – Sioux City, Council Bluffs
	Belvidere Township	15.624	25.144	Iowa 37 east – Soldier
	Mapleton	29.294	47.144	Iowa 141 east – Ute	Western end of Iowa 141 overlap
	Mapleton	29.895	48.111	Iowa 141 west – Smithland	Eastern end of Iowa 141 overlap
Woodbury	No major junctions
Ida	Corwin Township	50.418	81.140	US 59 north – Holstein	Western end of US 59 overlap
Ida	Corwin Township	54.068	87.014	US 59 south – Denison	Eastern end of US 59 overlap
Sac	Odebolt	64.476	103.764	Iowa 39 south – Kiron
	Clinton Township	69.433	111.742	Iowa 471 north – Early	Formerly US 71
	Coon Valley Township	79.135	127.355	US 71 north – Sac City	Western end of US 71 overlap; formerly Iowa 196
	Auburn	87.107	140.185	US 71 south – Carroll	Eastern end of US 71 overlap
Calhoun	Calhoun Township	99.179	159.613	Iowa 4 north – Rockwell City	Western end of Iowa 4 overlap
Calhoun	Reading Township	108.060	173.906	Iowa 4 south – Jefferson	Eastern end of Iowa 4 overlap
Webster	Lost Grove Township	119.976	193.083	Iowa 144 south – Paton
	Harcourt	122.974	197.907	US 169 north – Fort Dodge	Western end of US 169 overlap
	Dayton Township	126.988	204.367	US 169 south – Ogden	Eastern end of US 169 overlap
Hamilton	Clear Lake Township	145.174	233.635	Iowa 17 south to US 30	Western end of Iowa 17 overlap
	Stanhope	146.169	235.236	Iowa 17 north – Stanhope	Eastern end of Iowa 17 overlap
	Ellsworth Township	154.162	248.100	US 69 south – Ames	Western end of US 69 overlap
	Ellsworth	155.577	250.377	US 69 north – Blairsburg	Eastern end of US 69 overlap
	Lincoln Township	159.577	256.814	I-35 – Des Moines, Minneapolis
Hardin	Hubbard	172.950	278.336	US 65 south – Des Moines	Western end of US 65 overlap
Hardin	Tipton Township	179.950	289.601	US 65 north – Iowa Falls	Eastern end of US 65 overlap
Grundy	Melrose Township	197.593	317.995	Iowa 14 south – Marshalltown	Western end of Iowa 14 overlap
Grundy	Grundy Center	204.867	329.701	Iowa 14 north – Parkersburg	Eastern end of Iowa 14 overlap
Black Hawk	Lincoln Township	221.367	356.256	US 63 – Hudson, Waterloo, Tama
1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus

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References

2009 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. January 1, 2009. Retrieved January 21, 2011.

External links

The Iowa Highways Page: Highway 175
End of Iowa 175 at Iowa Highway Ends

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[IowaDOT-1] 2009 Volume of Traffic on the Primary Road System of Iowa (PDF) (Report). Iowa Department of Transportation. January 1, 2009. Retrieved January 21, 2011.