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  • Below average runoff continues for the upper Missouri River Basin

    “The runoff in February was less than predicted, and we expect the lower-than-average runoff to continue in the coming months,” said John Remus, chief of the U.S. Army Corps of Engineers’, Missouri River Basin Water Management Division. “The snow accumulation in both the plains and the mountains continues to be below average, and the soil moisture remains very low compared to normal. This resulted in us lowering our anticipated runoff for the 2022 water year.”

  • Below average runoff forecast for the upper Missouri River Basin in 2022

    The updated 2022 calendar year runoff forecast for the Missouri River Basin above Sioux City, Iowa, continues to be below average.  “Despite January’s runoff being slightly above average, we expect 2022 runoff to remain below average,” said John Remus, chief of the U.S. Army Corps of Engineers’, Missouri River Basin Water Management Division. “Both plains snowpack and mountain snowpack continue to lag behind seasonal averages, and soil moisture continues to be much drier-than-normal.”

  • 22-007 Dworshak Dam releases to fluctuate between 6,100 and 8,500 cfs in first week of February

    AHSAHKA, Idaho –Dworshak Dam will continue drafting to meet flood control targets through the end of January. Releases are expected to remain between 6,100 and 7,700 cubic feet per second (cfs) through the end of the month.

  • Walla Walla County and Corps partner to increase Mill Creek Channel’s safety

    In October 2018, the U.S. Army Corps of Engineers, Walla Walla District, in partnership with the non-federal sponsor, Walla Walla County, began a General Investigation (GI) study on the Mill Creek Flood Control Project.

  • Hydrodynamics in the Morganza Floodway and Atchafalaya Basin, Report 3: Phase 3; A Report for the US Army Corps of Engineers, MRG&P

    Abstract: The Morganza Floodway and the Atchafalaya Basin, located in Louisiana west of the Mississippi River, were evaluated using a two-dimensional Adaptive Hydraulics model. Prior to this study, Phase 1 and 2 model studies were performed that indicated that the existing floodway may not be able to pass the Project Design Flood discharge of 600,000 cubic feet per second due to levee overtopping. In this study, all elevations of exterior and interior levees were updated with current crest elevations. In addition, the Phase 3 effort evaluated the sensitivity of the floodway’s flow capacity to variations in tree/vegetation density conditions. These adjustments in roughness will improve the understanding of the role of land cover characteristics in the simulated water surfaces. This study also provides a number of inundation maps corresponding to certain flows through the Morganza Control Structure.

  • Dry Conditions expected to persist for the Missouri River Basin

    The 2021 calendar year runoff summation for the Missouri River basin above Sioux City, Iowa was 15.2 million acre-feet, 59% of average. The ongoing drought shows no relief in sight and the U.S. Army Corps of Engineers is predicting runoff into the mainstem reservoir system will remain below normal. This was the 10th lowest annual runoff for the Missouri River Basin in 123 years of record-keeping.

  • Gavins Point Dam releases reduced to winter release rate

    The U.S. Army Corps of Engineers began reducing the Gavins Point releases to the winter release rate on Nov. 23, marking the end of flow support for the 2021 Missouri River navigation season. “Releases from Gavins Point Dam are being reduced to the winter release of 12,000 cubic feet per second,” said John Remus, Chief of the Missouri River Basin Water Management Division. “Releases from Gavins Point are currently 13,000 cfs and we will slowly reduce releases to 12,000 by December 8. We will closely monitor river conditions, and releases will be adjusted this winter as needed to lessen the impacts of river ice formation on stages in the lower river.”

  • Development of a Sand Boil Testing Laboratory and Preliminary Results

    Purpose: To document the purpose, use, and preliminary results of a full-scale sand boil generator developed at the Geotechnical and Structures Laboratory.

  • Engineering With Nature: The Role of Mangroves in Coastal Protection

    Purpose: The purpose of this Engineering With Nature technical note (EWN TN) is to review previous studies of mangroves as a nature-based adaptation alternative for coastal protection and flood hazard mitigation.

  • Army Corps, Yakima conduct flood response training

    COVID-19 may have put a damper on how training and meetings are conducted, but Seattle District flood team managers learn to adapt, overcome and even improve on this year’s spring flood exercises.