Interstate 180 (Illinois)

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Interstate 180 marker

Interstate 180
I-180 highlighted in red
Route information
Auxiliary route of I-80
Maintained by IDOT
Length13.19 mi[citation needed] (21.23 km)
HistoryCompleted in 1969[1]
Major junctions
South end IL 26 / IL 71 in Hennepin
  US 6 in Princeton
North end I-80 in Princeton
CountiesPutnam, Bureau
Highway system
IL 179IL 180

Interstate 180 (I-180) is a north–south spur highway that runs from Princeton, Illinois to the small town of Hennepin, Illinois on its southern terminus. It is 13.19 miles (21.23 km) long.[2]

Route description[edit]

Interstate 180 begins as a continuation of Route 71 at a diamond interchange with Route 26 northeast of Hennepin. The interchange is located adjacent to a former steel mill that was most recently operated by ArcelorMittal until 2009.[3] The freeway travels northwest, carrying I-180 and Route 26 in a concurrency, and crosses the Illinois River on the north side of Hennepin to enter Bureau County.[4]

On the west side of the river, Route 26 separates from I-180 and the freeway crosses over Route 29 before splitting at a Y-interchange. I-180 turns north, intersecting an expressway that connects to Route 29, and travels northeast across Big Bureau Creek to intersect Route 26. The freeway intersects U.S. Route 6 east of Princeton and continues due north to its terminus, a trumpet interchange with I-80. I-180 has four lanes for its entire length.[4]


Construction of I-180 was completed in 1969.[1] The freeway was built primarily to connect Interstate 80 to a new Jones & Laughlin steel plant built in 1965 in Hennepin, IL.[5] However, the steel plant closed soon after I-180 was built, and did not re-open until August 2002.[citation needed] Federal auditors criticized its construction and called it a political favor that was put ahead of other requests from Tucson, Arizona and Tacoma, Washington.[6]

I-180 is one of the least traveled interstates in the nation, serving 1,950–3,600 vehicles per day as of 2013.[7]

Exit list[edit]

PutnamHennepin0.00.014 IL 71 / IL 26 south – Hennepin, LaconSouthern terminus
South end of IL 26 concurrency
1.01.6Illinois River
BureauBureau Junction2.54.012 IL 26 north to IL 29 north – Bureau JunctionNorthbound exit and southbound entrance
North end of IL 26 concurrency
3.55.6- To IL 29 – PeoriaIndirect access via unnamed connector expressway
8.012.97 IL 26 – Princeton
Princeton12.019.33 US 6 – Princeton, Spring Valley
13.221.2- I-80 – Davenport, JolietNorthern terminus; I-80 exit 61.
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ a b Scott, Tony (December 21, 2006). "Strong opinions on Prairie Parkway plans". Oswego Ledger-Sentinel. Archived from the original on December 28, 2010. Retrieved February 15, 2008.
  2. ^ United States Department of Transportation - Federal Highway Administration (October 31, 2002). "Route Log - Auxiliary Routes of the Eisenhower National System Of Interstate and Defense Highways". Retrieved January 30, 2007.
  3. ^ Smith, Gary L. (April 19, 2017). "Shuttered Hennepin steel mill being demolished". Journal Star. Peoria, Illinois. Retrieved September 29, 2019.
  4. ^ a b Google (September 29, 2019). "Interstate 180" (Map). Google Maps. Google. Retrieved September 29, 2019.
  5. ^ "Boom Town 1965". Time. July 9, 1965. Retrieved July 9, 2012.
  6. ^ Polk, James R. (August 4, 1970). "Federal Auditors Criticize a $40-Million Interstate Highway Spur to Illinois Steel Plant". Capital Journal. p. 26. Retrieved July 10, 2018 – via Free to read
  7. ^ Illinois Department of Transportation (2013). "T2 GIS Data". Archived from the original on March 2, 2016. Retrieved February 24, 2016.

External links[edit]

Route map:

KML is from Wikidata