Iowa DOT News Release

Iowa DOT provides update on flooded road conditions #MoRiver

Posted on: June 12, 2011

AMES, Iowa – June 12, 2011 – 12 p.m. – The Iowa Department of Transportation (DOT) is reporting there have been no new road closures in western Iowa due to flooding. The department is continuing to monitor at-risk areas as flood water levels continue to rise. 

Turn Around Don't Drown®

Flooding is a dynamic situation, ever-changing throughout the day. Motorists need to take extra precautions when traveling in areas where flooding is occurring or predicted.

  • Use additional caution when traveling at night when it is difficult to see a flooded road ahead or water approaching the roadway from the side.
  • If you must travel on roadways where water is nearby, give your full attention to the driving task and expect vehicles ahead to slow down or make sudden stops.
  • Keep your focus on the road ahead, not on the water around you and adjust your speed for conditions.  

Current road closures/restrictions

  • I-29 Hamilton Boulevard interchange in Woodbury County: The southbound I-29 interchange ramps at Hamilton Boulevard in Sioux City are closed. The northbound on- and off-ramps remain open. An alternative ramp has been constructed from southbound I-29 to Wesley Parkway/U.S. 77.
  • I-29 in Pottawattamie County: The south- and northbound lanes of I-29 between milepost 55 (N. 25th Street in Council Bluffs) and the I-29/I-680 interchange at milepost 71 (near Loveland) are closed.
  • I-680 in Pottawattamie County: I-680 is closed from the I-29/680 interchange (exit 61 near Crescent) in Iowa to North 30th Street in Omaha, Nebr. (exit 13). This closure includes the Mormon Bridge across the Missouri River. The Iowa detour route for interstate roadways closed in this vicinity is: I-680 east from the I-29/I-680 interchange near Loveland to I-80, and then take I-80 southwest to Council Bluffs. Eastbound travelers on I-680 in Omaha that are intending to travel to Iowa must exit at North 30th Street (exit 13), continue south on North 30th Street to U.S. 75/I-480, and then continue south on I-480 to I-80 eastbound.
  • Iowa 2 in Fremont County: The right lane of eastbound Iowa 2 is closed west of I-29. The westbound lanes remain open. The speed limit will be reduced on this highway to assist travelers safely navigate through the area.  

Highway segments at high risk of being closed due to flooding

  • I-29 near Blencoe: Two segments of I-29 are at risk of being impacted by flood waters in this area: (1) near milepost 103.5 south of Blencoe; and (2) near milepost 107 north of Blencoe.
  • I-29 and U.S. 30 near Missouri Valley: Locally sponsored agricultural levees provide some measure of protection for this area. Three highway segments are at most risk in this area: (1) U.S. 30 west of I-29 between mileposts 7 and 8; (2) U.S. 30 east of I-29 between mileposts 9 and 10; and (3) I-29 between mileposts 77 and 78.
  • I-29/I-680 interchange between mileposts 71-72 near Loveland: This interchange is presently part of the I-29 detour. It is expected to be covered with flood waters. A loss of this interchange will significantly impact I-29 travel along the entire highway corridor because it currently serves as a connector between the northern and southern portions of the route. The extent of the traffic impact on the multistate region is yet to be determined. It is dependent on what other Missouri River bridges and roadway segments along the corridor are eventually closed due to flooding.     
  • I-29, U.S. 275 and Iowa 333 at Hamburg in Fremont County: Temporary repairs have been made to the levee in Atchison County, Mo., to delay a full breach. The timing of the closure of these roadways hinges on a full breach.
  • Iowa 127 near Mondamin: The segments most at risk of flooding are located east and west of Mondamin, near mileposts 0.8 and 1.5.
  • Iowa 175 near Onawa: The segment most at risk of flooding is west of I-29 near the Missouri River. This route serves as the river crossing between Onawa, Iowa, and Decatur, Nebr. 

Undergoing further evaluation or being monitored

  • I-29 northbound off-ramp to Dace Avenue in Sioux City (exit 147B or commonly known as the Downtown/Tyson Events Center): Flood mitigation efforts will be deployed to try to keep this ramp open.
  • I-29 northbound and southbound lanes in Sioux City at the U.S. 77/Wesley Parkway underpass (between exits 148 and 149): Flood mitigation efforts will be deployed to try to prevent this low area from being flooded.
  • I-29, from south of Bellevue (milepost 39) to Hamburg (milepost 1): This area is at a lesser risk, but would be inundated if the levee is breached or overtopped.
  • Iowa 376 (U.S. 75 Business): The roadway from Gordon Drive to Third Street in Sioux City may be closed if current pumping efforts are not sustainable. 

NEW:Missouri River crossings
The Iowa DOT is expecting the Missouri River crossings at the following locations to remain open during the flooding:

  • Sioux City: U.S. 77/U.S.20 to South Sioux City, Nebr.; and U.S. 20/U.S. 75 to Nebraska
  • Council Bluffs/Omaha: I-480 and I-80  

For traveler assistance, call the Iowa DOT’s flood information call center 866-452-8510 from 7 a.m. to 9 p.m. daily. 

For current updates on road conditions – 24 hours a day, visit or call 511 (in Iowa) or 800-288-1047 (outside of the state).

For all of the Iowa DOT’s flood-related information, visit and click on the “Flooding Ahead” sign. You can also follow the Iowa DOT on Twitter at!/iowadot/. 


Media contact: Dena Gray-Fisher at



Iowa highway in the evening