Form Approved
REPORT DOCUMENTATION PAGE
OMB No. 0704-0188
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1. AGENCY USE ONLY (Leave blank)
2. REPORT DATE
3. REPORT TYPE AND DATES COVERED
September 1995
4. TITLE AND SUBTITLE
5. FUNDING NUMBERS
Ice Jam Flooding on the Missouri River
ENH 2654
Near Williston, North Dakota
6. AUTHORS
James L. Wuebben and John J. Gagnon
7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)
8. PERFORMING ORGANIZATION
REPORT NUMBER
U.S. Army Cold Regions Research and Engineering Laboratory
72 Lyme Road
CRREL Report 95-19
Hanover, New Hampshire 03755-1290
9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)
10. SPONSORING/MONITORING
AGENCY REPORT NUMBER
U.S. Army Engineer District, Omaha
11. SUPPLEMENTARY NOTES
For conversion of SI units to non-SI units of measurement consult Standard Practice for Use of the International System of Units (SI),
ASTM Standard E380-93, published by the American Society for Testing and Materials, 1916 Race St., Philadelphia, Pa. 19103.
12a. DISTRIBUTION/AVAILABILITY STATEMENT
12b. DISTRIBUTION CODE
Approved for public release; distribution is unlimited.
Available from NTIS, Springfield, Virginia 22161.
13. ABSTRACT (Maximum 200 words)
This investigation focused on ice-related flooding along the Missouri River, just below the confluence with the
Yellowstone River near Williston, North Dakota. This area is at the upper end of Lake Sakakawea. With the
closure of Garrison Dam in 1953, Lake Sakakawea began filling, reaching operational levels in 1965. Changes
in the hydraulics, sedimentation and ice regime of the Missouri River caused by the impoundment have led to
an increase in the potential for overbank flooding. This report describes the ice regime assessment that was
conducted to characterize ice jam flooding, the development of a method to predict the potential for ice jam
occurrence and severity, and potential flood mitigation measures.
14. SUBJECT TERMS
15. NUMBER OF PAGES
30
Ice jams
Ice control
Ice prediction
Ice jam flooding
16. PRICE CODE
Ice modeling
Ice jam flood mitigation
17. SECURITY CLASSIFICATION
18. SECURITY CLASSIFICATION
19. SECURITY CLASSIFICATION
20. LIMITATION OF ABSTRACT
OF REPORT
OF THIS PAGE
OF ABSTRACT
UNCLASSIFIED
UNCLASSIFIED
UNCLASSIFIED
UL
Standard Form 298 (Rev. 2-89)
NSN 7540-01-280-5500
Prescribed by ANSI Std. Z39-18
298-102
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