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Flood of June 15-17, 1998, Nishnabotna and East Nishnabotna rivers, Southwest Iowa

Open-File Report 99-70

Prepared in cooperation with the Iowa Department of Transportation and Iowa Highway Research Board (Project HR-140)
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Abstract

Record flooding occurred June 15-17, 1998, in the Nishnabotna and East Nishnabotna River basins following severe thunderstorm activity over southwest Iowa. More than 8 inches of rain fell over a large part of Cass County. The rain gage at Atlantic, Iowa recorded a 24-hour total rainfall of 13.18 inches, which established a new official State record for the greatest amount of rainfall in a 24-hour period. The peak discharge was 41,400 cubic feet per second in the East Nishnabotna River near Atlantic, 60,500 cubic feet per second in the East Nishnabotna River at Red Oak, and 65,100 cubic feet per second in the Nishnabotna River above Hamburg. The peak discharge at Atlantic was greater than the theoretical 200-year flood and the peak discharges at Red Oak and Hamburg were greater than the respective theoretical 500-year floods. Information about the basin, the rain storms, the flooding, and a profile of high water marks at selected intervals along the Nishnabotna and East Nishnabotna Rivers are presented in this report.

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Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Flood of June 15-17, 1998, Nishnabotna and East Nishnabotna rivers, Southwest Iowa
Series title:
Open-File Report
Series number:
99-70
Year Published:
1999
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Iowa City, IA
Contributing office(s):
Iowa Water Science Center
Description:
iv, 15 p.
Country:
United States
State:
Iowa
Other Geospatial:
East Nishnabotna River and Nishnabotna River
Online Only (Y/N):
N
Additional Online Files (Y/N):
N