As flood risk increases, FEMA pushes updates on southwest Iowa levees


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Levees hold back floodwaters from developed areas (via Creative Commons). 

Julia Poska | December 6, 2019

FEMA will “de-accredit” 94.5 miles of levees in southwest Iowa and northwest Missouri unless owners make updates that ensure protection within new 100-year flood boundaries, the Des Moines Register reported Wednesday.

The levees protect parts of Pottawattamie, Mills and Fremont counties, which experienced historic flooding this spring.

Affected communities have historically been located in FEMA’s 500-year floodplain, giving them a 0.2% chance of flooding in a given year (NOT flooding once in 500 years, as is a common misconception). Flood recurrence is calculated from historic averages, and increasing flood frequency due to climate change now puts those areas within the 100-year flood plain, making flood risk 5 times higher.

The floodplain updates take effect in the spring but levee owners have a few years to make updates before official losing accreditation. The Register reports, “It’s estimated that work to meet FEMA’s standards could cost upwards of $1 million per mile of levee,” a steep price for an area still recovering from the last round of floods.

The Register reported that nearly 1,500 home and business owners would need to purchase flood insurance in the spring the levees don’t receive updates. In such a high-risk area, insurance would become mandatory, and rates in some areas could increase 2600%, according to the Register. 

 

Another round of flooding impacting southwest Iowa


Flooding in the Southwest Iowa affect residents and highways|Photo by Marion Patterson on Flickr

Sthefany Nóbriga | May 30th, 2019

People in Southwest Iowa suffered record-breaking flooding in mid-March thanks to the spring extreme rainfall and rapid snowmelt. Now, a second round of flooding is on the horizon, threatening those previously affected.

 The saturation of the soil, a large amount of rain and the river flow are once again causing road and highway closures, county evacuations and major floods warnings around the southwest part of the state. 

According to the National Weather Service, the Missouri River in Nebraska City measured approximately 22.5 feet, and it soon could reach critical stages of flooding. The Missouri River in Plattsmouth, Neb., was at 31.3 feet, and could soon reach the moderate flooding stage.

As rain continues to fall, residents from Mills County, Iowa, near the Missouri River, have been advised to evacuate the area for their own safety. In the meantime, almost 300 people have been under obligatory evacuation in the western portion of Fremont County.

The main concern of officials is not only the record-breaking rains and the rising river levels, but they are also concerned that the floods from early March, left the county with no protection against flooding, according to Iowa Public Radio.

These heavy rains have caused significant damage to the roads and interstates, the interstate highway 29 in Iowa and Missouri have closed for the second time due to the flooding; the first time was the flooding from early March, and now the road closes again after only two weeks of being repaired. Portions of highway 34 and highway 2 have also closed due to flooding. 

The traveler Information encourages divers to check 511ia.org or call 800-288-1047 if they have any questions before traveling through the Midwest. 

Experts advise people to stay cautious, and if they see roads with water over them, it’s best to turn around and find an alternate route, since it is impossible to guess how deep the water in the road could possibly be.

On the Radio: At Green Plains ethanol plant, Shenandoah seeks an algae-powered Iowa


Photo: City of Shenandoah.

This week’s radio segment highlights some innovative research going on in the tiny city of Shenandoah – attempts to use algae for fuel.

But the experiment is just one of many of the town’s cutting-edge green efforts. The city has also installed more energy-efficient lighting in its downtown, and it received the first ever permit to construct and operate an air curtain incinerator that cleanly burns yard waste.   Continue reading