Flood Impacts

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1234
Top of dam elevation.
1221.4
Elevation at maximum spillway design discharge capacity.
1210
Maximum operating pool.
1208
Base of the exclusive flood control zone.
1204.5
Base flood control elevation.
1180
Spillway crest elevation.

Flood Impacts

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22.5
homes start flooding at Larsens Landing.
20
camping and other recreational areas near the river will have flood problems, and some pasture land along the river will also flood.
18
some of the camping and other recreational areas along the river could start seeing some minor flood problems.

Flood Impacts

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31.75
the road near Mounts Landing in Clay County is flooded.
30
both banks overflow.

Flood Impacts

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39
Water reaches portions of 4th St in South Sioux City near the gauge location under the Hwy 20 bridge.
36
Extensive urban flooding in lower lying portions of Sioux City begins.
35
The levee protecting various structures in parks and memorials on the Iowa side of the river is overtopped.
33
Additional recreational areas and some pasture land along the river begin to flood.
31
The baseball fields at Scenic Park are flooded.
30
Some of the boat docks and marinas along the river begin to flood. The levee at the Scenic Park campground is overtopped at flooding may impact the parking lot at the Lewis and Clark Interpretive Center if the levee is breached.
29
The parking lot of baseball fields at Scenic Park begin to flood on the Nebraska side of the river. The lowest portions near the Lewis and Clark Interpretive Center and Flight 232 Memorial begin to flood.
25
Lower Scenic Park campground in South Sioux City may begin to be affected by flooding.
4
The power plants around Sioux City have problems as the water levels fall below what is needed for the cooling intake valves.

Flood Impacts

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44
Widespread major flooding would be prevalent along the entire reach from just upstream of Decatur downstream to the mouth of the Little Sioux River.
38
Extensive flooding along the reach would be encountered. Areas impacted will include Marina Drive as well as numerous homes along the river.
35
Local marinas, boat docks and low lying areas begin to flood.

Flood Impacts

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33.5
Water reaches levels not seen since the flood of 1952. Major flooding will be occurring from Blair to Fort Calhoun.
30
Industrial companies along the river near Blair begin to be significantly impacted.
29
Floodwaters are impacting Interstate 29 between exit 61 near Crescent and exit 71 near Loveland. In addition water may begin to enter the Desoto NWR.
28
Water begins to impact the Interstate 680 ramp near Crescent.
26.5
Lowland flooding is occurring. This flooding affects several campgrounds near the river and includes County Roads 34, 47 and 51 east of Fort Calhoun.
23.5
Flooding begins to occur at Wilson Island State Park.

Flood Impacts

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40
At this level the water nears the top of the federal levee.
36
Water reaches the bottom of flood wall just north of Interstate 480. Low lying roads are also affected just east of Riverfront Drive north of the pedestrian bridge.
32.5
Floodwaters are reaching areas near Council Bluffs, specifically near Interstate 29, miler marker 56.
30.5
Floodwaters are impacting Interstate 29/680 near Crescent and northward to exit 71 near Loveland.
29
At this level water nears the base of the Council Bluffs levee. Significant lowland flooding occurs in NP Dodge Park, Freedom Park, Tom Hanafan Park, Fontenelle Forest and Haworth Park.
28
At this level most of the flood gates for the city of Council Bluffs are closed.
27
Freedom Park, Tom Hanafan Park and Fontenelle Forest begin to flood.
25
NP Dodge Park in north Omaha is flooding and will be closed. A casino parking lot begins to flood along the Iowa side of the river. In addition, Haworth Park located in Bellevue begins to flood.
21
At this level the City of Council Bluffs begins closing flood gates.
19
At this level, the City of Council Bluffs begins to close drainage gates that discharge into the river.

Flood Impacts

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37.5
River gage communications may be impacted as the gage itself begins to be impacted, specifically the junction box.
35
Wells for the City of Plattsmouth begin to be impacted by floodwaters.
33
Portions of Highway 34 and several county roads between the river and Interstate 29 will be closed due to flooding. In addition, homes along the Nebraska side begin to be impacted.
32
The water treatment plant for Plattsmouth begins to flood. In addition, River Road begins to flood.
29
At this level, water is flowing through breached levees causing significant flooding to areas that were previously protected.
28.5
A campground off of River Road, about 1.5 miles downstream of the gauge, begins to flood.
28
The Water Treatment Plant road floods.
27
Minor flooding is occurring in the parking lots near the gauge site and boat ramp. In addition, a private camping area just upstream of the gauge site begins to flood.
26
Fields west of Dock Road flood.