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  • Tar-Pamlico and Neuse River Basins, North Carolina, Geomorphic Summary Report

    Abstract: The Tar-Pamlico and Neuse River Basins are neighboring basins in eastern North Carolina, both originating in the piedmont physiographic region, transitioning to coastal plains, and emptying into Pamlico Sound. The Pittsburgh District is responsible for the continued efforts to assist local sponsors with managing these basins and submitted a Water Operations Technical Support (WOTS) request. The WOTS program, funded by Headquarters, US Army Corps of Engineers, provides funding for the Coastal and Hydraulics Laboratory (CHL) to provide technical assistance to develop innovative solutions to water resource problems. The objectives of this study are to identify flood risk management alternatives to address the accumulation of woody debris in the channel systems. CHL compiled existing conditions information and researched current and potential new methods for managing woody debris to provide a comprehensive list of recommendations. The results and recommendations are provided in this document.

  • 22-046 Corps stops diverting water as Mill Creek flows recede

    WALLA WALLA, WA – Water Management officials at the Walla Walla District stopped diverting water into Bennington Lake at 5:45 a.m. in response to receding flows coming down Mill Creek. The diverted water will remain in Bennington Lake until Russell Creek and Cottonwood Creek flows recede.

  • Below average runoff forecasts for upper Missouri River Basin continue

    Runoff continues to be below average in the upper Missouri River Basin above Sioux City, Iowa. Below-normal precipitation, dry soil conditions in the western portions of the basin, and cooler-than-normal temperatures slowing mountain snowmelt, resulted in a May runoff of 2.7 million acre-feet. While this was 0.4 MAF more than forecast last month, this volume is still 79% of average.

  • Three-Dimensional Underseepage Evaluation for Profit Island Vicinity Levee, North of Baton Rouge, Louisiana

    Abstract: This project developed a three-dimensional (3D) seepage model to evaluate efficiency of 84 relief wells and factors of safety (FoS) along the Profit Island vicinity levee (PIVL), north of Baton Rouge, Louisiana. The PIVL model was built based on US Geological Survey MODFLOW-USG. Moreover, a 3D seepage model of RocScience RS3 was also built for a specific study of relief well experiments conducted by the US Army Corps of Engineers in the 1930s and 1940s. The PIVL model was calibrated with measured piezometric head data and relief well flow rates in 1997. Six flood scenarios were conducted: the extreme flood (56 feet), design flood (52.4 feet), 1997 flood (50 feet), 2008 flood (49.22 feet), 2017 flood (45.55 feet), and 2018 flood (49.1 feet). The modeling results show that FoS are all above 1.5 given relief wells at the 1997 design condition. FoS calculated by the blanket theory are more conservative than those by the PIVL model because designed discharge rates were not observed in the field. In comparison with measured flow rates in 2008, the PIVL modeling result indicates potential clogging at many relief wells. New piezometric data and well discharge data are recommended to re-evaluate factors of safety.

  • Drought conditions persist throughout the Missouri River Basin

    Dry conditions in April resulted in well-below average runoff in the upper Missouri River Basin. April runoff was 1.5 million acre-feet, which is 51% of average. The updated 2022 upper Basin runoff forecast is 17.8 MAF, 69% of average, which, if realized, would rank as the 23rd lowest calendar year runoff volume.

  • Upper Missouri River basin forecast runoff remains well below normal; water conservation measures continue

    Reservoir inflows in the Missouri River basin above Sioux City, Iowa, were well-below average in March. The March runoff of 1.5 million acre-feet (MAF) was 48% of average for the month. The updated 2022 upper Basin runoff forecast is 17.8 MAF, 69% of average, approximately 2.6 MAF less than the March 1 forecast. 

  • Update: USACE Vicksburg District reopens Steele Bayou Control Structure

    VICKSBURG, Miss. – The U.S. Army Corps of Engineers (USACE) Vicksburg District reopened the gates of the Steele Bayou Control Structure, located approximately 10 miles north of Vicksburg, Mississippi, March 22.

  • Schedule for Missouri River spring public meetings set

    Spring public meetings to discuss Missouri River Water Management operations and plans are scheduled for April 11-15. Spring public meetings provide a status of mountain snowpack, a runoff forecast for the year, and how operations during the runoff year will meet the authorized purposes for the Missouri River Mainstem System.

  • USACE Vicksburg District closes Steele Bayou Control Structure

    VICKSBURG, Miss. – The U.S. Army Corps of Engineers (USACE) Vicksburg District closed the gates of the Steele Bayou Control Structure, located approximately 10 miles north of Vicksburg, Mississippi, March 4.

  • USACE Vicksburg District announces Mississippi lakes release operation plan

    VICKSBURG, Miss. – The U.S. Army Corps of Engineers (USACE) Vicksburg District announces the water release operation plans for its Mississippi lakes during March 2022.