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Flood of June 30–July 1, 2018, in the Fourmile Creek Basin, near Ankeny, Iowa

Open-File Report 2021-1044
Prepared in cooperation with the Iowa Department of Transportation and the Iowa Highway Research Board (Project HR–140)
By: , , and 
https://doi.org/10.3133/ofr20211044

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Abstract

Major flooding occurred June 30–July 1, 2018, in the Fourmile Creek Basin in central Iowa after thunderstorm activity over the region. The largest recorded 24-hour precipitation total at a National Oceanic and Atmospheric Administration weather station was 8.72 inches in Ankeny, Iowa, and 7.54 inches in Des Moines, Iowa. A maximum peak-of-record discharge of 10,000 cubic feet per second was recorded at U.S. Geological Survey streamgage 05485605, Fourmile Creek near Ankeny, Iowa, on July 1, 2018, with an annual exceedance probability of less than 0.2 percent. A maximum peak-of-record discharge of 12,000 cubic feet per second also was recorded at U.S. Geological Survey streamgage 05485640, Fourmile Creek at Des Moines, Iowa, on July 1, 2018, with an annual exceedance-probability range of 0.5–1 percent. High-water mark elevations were surveyed at 11 locations along Fourmile Creek between State Highway 163 in Pleasant Hill, Iowa, and U.S. Route 69 near Alleman, Iowa, a distance of 21.0 river miles. The high-water marks were used to develop a flood profile for Fourmile Creek.

Suggested Citation

O’Shea, P.S., Vegrzyn, J.C., and Barnes, K.K., 2021, Flood of June 30–July 1, 2018, in the Fourmile Creek Basin, near Ankeny, Iowa: U.S. Geological Survey Open-File Report 2021–1044, 18 p., https://doi.org/10.3133/ofr20211044.

ISSN: 2331-1258 (online)

Study Area

Table of Contents

  • Acknowledgments
  • Abstract
  • Introduction
  • Purpose and Scope
  • Study Area
  • Storm Event
  • Flood Description
  • Flood Discharge
  • Annual Exceedance Probabilities
  • Flood Profile
  • Flood Event Viewer
  • Summary
  • References Cited
  • Appendix 1. List of Bench Marks and Reference Points
Publication type Report
Publication Subtype USGS Numbered Series
Title Flood of June 30–July 1, 2018, in the Fourmile Creek Basin, near Ankeny, Iowa
Series title Open-File Report
Series number 2021-1044
DOI 10.3133/ofr20211044
Year Published 2021
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Central Midwest Water Science Center
Description Report: vi, 18 p.; Data Release; Dataset
Country United States
State Iowa
City Ankeny
Other Geospatial Fourmile Creek basin
Online Only (Y/N) Y
Google Analytic Metrics Metrics page
Additional publication details