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Simplified map of Iowa Bedrock formations of Iowa The geography of Iowa includes the study of bedrock, landforms, rivers, geology, paleontology and urbanisation of the U.S. state of Iowa . The state covers an area of 56,272.81 sq mi (145,746 km 2 ).
U.S. Highway 52 (US 52) is a 166-mile-long (267 km) United States Numbered Highway in northeast Iowa.The route begins at the Dale Gardner Veterans Memorial Bridge over the Mississippi River between Sabula and Savanna, Illinois.
U.S. Highway 20 (US 20) in Iowa is a major east–west artery which runs across the state, separating the northern third of Iowa from the southern two-thirds. It enters Iowa from Nebraska, concurrent with Interstate 129 (I-129) and US 75, crossing the Missouri River at Sioux City.
US 161 was an original U.S. Highway; it and the rest of the system were designated in 1925 and were signed by the summer of 1926. [2] US 161 replaced parts of two primary roads in eastern Iowa – Primary Road No. 40, which was known as the Red Ball Route, from Keokuk to Cedar Rapids, and Primary Road No. 28, parts of which were known as the Red X Route. [6]
Park access road Iowa 274: 1.99 [12] 3.20 Ambrose A. Call State Park: US 169 near Algona: 1934: 1986 Park access road; formerly Iowa 163 Iowa 276: 4.711: 7.582 Spirit Lake city limits: Minnesota state line 1934: 2003 Park access road Iowa 277: 6.24: 10.04 Numa: Iowa 5 near Centerville: 1935: 1980 Spur route
At another interchange near the city center, US 18 exits and heads west; Iowa 24 heads east. The four-lane road curves along the north side of town and meets the northern end of the business route. As the road curves back to the north, the divided highway ends and it becomes a two-lane road for the remainder of its trip through Iowa.
In Kossuth County, Iowa 9 passes through Swea City.East of Swea City, it is joined by U.S. Route 169.It passes north of Lakota, where US 169 turns north.Travelling through Buffalo Center in Winnebago County, the route takes a short southerly dip to pass northeast of Thompson, continues east, and then south overlapping U.S. Route 69 to the northern edge of Forest City where it again turns east.
Serves the Mason City area US 18 Bus. 4.149: 6.677 US 18 / Iowa 76 near McGregor: US 18 / Iowa 76 in Marquette: 1989: current Serves McGregor and Marquette; former routing of US 18 US 20 Bus. — — US 77 / US 20 Bus. at South Sioux City, Neb. US 20 / US 75 at Sioux City: 1979: current Serves Sioux City area; former routing of US 20