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Interstate 129 (I-129) is an auxiliary Interstate Highway which connects South Sioux City, Nebraska, to I-29 in Sioux City, Iowa. Opened in 1976, I-129 is a 3.5-mile-long (5.6 km) route, running 3.21 miles (5.17 km) in Nebraska. At 0.286 miles (0.460 km), I-129 is the shortest highway in the state of Iowa.
The proposed highway was to run from Illinois Route 80 near Port Byron, Illinois, which ran along the eastern bank of the Mississippi River, over a new bridge into Iowa. It would then span 298 miles (480 km) across the state to the South Omaha Bridge where US 275 crossed the Missouri River. [50] The entire route was to be near US 6 across the ...
Backbone State Park: Iowa 3 / Iowa 13 near Strawberry Point: 1927: 1957 Renumbered Iowa 410 No. 20: 324 [3] 521 Illinois state line at Keokuk: Minnesota state line near Burr Oak: 1920: 1926 Replaced by US 61 and US 55 Iowa 21: 115: 185 Minnesota state line near Allendorf: Iowa 141 near Denison: 1920: 1934
Longer bridges can reduce the width of both shoulders to 4 feet (1.2 m). Existing bridges can remain part of the Interstate system if they have at least 12-foot-wide (3.7 m) lanes with 3.5-foot (1.1 m) shoulder on the left and a 10-foot (3.0 m) shoulder on the right, except that longer bridges can have 3.5 feet (1.1 m) shoulders on both sides.
The Davenport Skybridge is a pedestrian cable-stayed bridge [5] that spans River Drive in downtown Davenport, Iowa. It connects LeClaire Park to a courtyard and parking ramp on 2nd Street, located near the River Music Experience. The bridge, completed in 2005, is 50 feet (15 m) tall, 575 feet (175 m) long, and features 99 feet (30 m) columns.
Mount Ayr is a city in Ringgold County, Iowa, United States.The population was 1,623 at the time of the 2020 census. [3] [4] Mount Ayr is a rural community in southwestern Iowa, 22 miles west of Interstate 35 on State Highway 2.
Hawkeye Point is the highest natural point in Iowa at 1,670 feet (510 m). [1] It is approximately 4.5 miles (7.2 km) north of Sibley on the eastern side of SR 60 and approximately 3.5 miles (5.6 km) south of the Iowa-Minnesota state border. The high ground lies 100 feet (30 m) due south of an old silo.
Topography of Iowa, with counties and major streams Landforms of Iowa, based on Prior (1991) and Calvin (1904), with major rivers and streams. Despite popular perception, Iowa is generally not flat; most of the state consists of rolling hills. Prior [19] divides Iowa into eight landforms based on glaciation, soils, topography, and river drainage: