IA DOT road report on flooding & maintenance


June 30th, 2011 by Ric Hanson

Interstate 29 Exit Ramp 72 Closed. – Issued 6:20 PM

Interstate 29 southbound Exit Ramp 72 or the Loveland exit is closed due to road maintenance activities.  Length of closure unknown at this time.

Current road closures/restrictions as of 5-p.m. CDT
·         I-29 Hamilton Boulevard interchange in Woodbury County: The southbound
I-29 interchange ramps at Hamilton Boulevard in Sioux City are closed. An
alternative ramp has been constructed from southbound I-29 to Wesley Parkway/U.S.
·         I-29 in Pottawattamie County: The south- and northbound lanes of I-29
between milepost 54B (North 35th Street interchange in Council Bluffs) and the
I-29/680 interchange at milepost 71 (near Loveland) are closed. This is expected to
be a longer-term closure.
·         UPDATE: I-29 from exit 24 (near Bartlett, Iowa) south across the
Iowa/Missouri state line to the U.S. 136 interchange in Missouri (Mo. 110 exit, near
Rock Port): The north- and southbound lanes are closed. This is expected to be a
longer-term closure.
·         I-680 in Omaha area: I-680 is closed from the I-29/680 interchange (exit
61 near Crescent) in Iowa to North 30th Street in Omaha, Neb. (exit 13). This
closure includes the Mormon Bridge across the Missouri River. This is expected to be
a longer-term closure.
·         UPDATE: U.S. 30 west of Missouri Valley, including the Blair, Neb. Bridge
across the Missouri River: This road is closed temporarily to permit installation of
flood barrier walls. For further information about this closure and future temporary
closures along this roadway, visit:
·         Iowa 2 in Fremont County: Iowa 2 is closed from I-29 in Iowa to Nebraska
City. Both east- and westbound lanes are closed. This is expected to be a
longer-term closure.
·         UPDATE: Iowa 175 between I-29 (near Onawa) and Decatur, Neb.: The road is
closed because of serious erosion of the embankment near the east abutment of the
Decatur Bridge. For information about the emergency repair project, visit:
·         Iowa 333 in Hamburg: Iowa 333 is closed from I-29 into Hamburg. Access to
Hamburg is currently available via U.S. 275 in Iowa. 
·         Iowa 376 northbound (U.S. 75 Business-Lewis Boulevard): The exit ramp to
westbound Gordon Drive is closed. 

Highway segments at higher risk of being closed due to flooding
·         I-29 (north of Missouri Valley, between mileposts 77-78): Flood barrier
walls have been installed in this area. 
·         I-29 (north of Modale, between mileposts 85-88): This is a levee-protected
area. However, if a breach were to occur, the roadway could be inundated with
several feet of flood water. 
·         UPDATE: I-29 (south of Blencoe, between mileposts 103-105): Flood waters
are spreading across the drainage area nearby. A flood-mitigation strategy for this
area is currently being evaluated. 
·         I-29 (north of Blencoe, near mileposts 107 and 109): Flood barrier walls
are being installed in this area to reduce the risk of flooding. There is a
temporary detour in place for I-29 northbound travelers, which is allowing the
barriers to be installed. Follow the detour signs. 
·         I-29 (north of Whiting, near milepost 121): This area is threatened due to
a connection between the Missouri River and a stream that flows under Berry Avenue
and through the Badger Lake State Wildlife Management Area.   
·         I-29/I-680 interchange: This interchange near Loveland was previously
closed due to flooding. Mitigation work, including use of sandbags, barrier wall and
pumps, allowed the roadway to reopen. Because this area remains vulnerable to
increased water levels, additional mitigation measures will be taken, including
contract work to install large drainage pipes.  
·         U.S. 34, between I-29 in Iowa and Plattsmouth, Neb.: This roadway is
protected by a levee system, but remains at risk from a levee breach or overtopping.
U.S. 34 remains open to travel. 

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, southbound exit ramp to Nebraska Street (exit 147B) in Sioux City:
This area is dike protected, but would be inundated if the dike is breached or
·         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. 
·         UPDATE: I-29, from the Bellevue, Neb., interchange (exit 42) to the
Bartlett interchange (exit 24): This area is at a lesser risk, but would be
inundated if a levee is breached or overtopped.
·         I-29 exit and entrance ramps at the Bartlett interchange, exit 24: Ground
water has been rising nearby. Flood waters have closed I-29 south of the
·         Iowa 127 near Mondamin: The Iowa DOT is monitoring areas east and west of
Mondamin, near mileposts 0.8 and 1.5, but the risk of flooding is lower because the
road is protected somewhat by a high ridge. 
·         NEW: Iowa 370 west of I-29, including the Bellevue, Neb. Missouri River
crossing: This area is levee protected. Levee reinforcement work was performed this
week on an area just south of Iowa 370.