Missouri River Mainstem Reservoir System Summary of Actual 2010 Regulation
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US Army Corps of Engineers Northwestern Division Missouri River Mainstem Reservoir System Summary of Actual 2010 Regulation Missouri River Basin Fort Peck Garrison Oahe Big Bend Fort Randall Gavins Point U.S. Army Corps of Engineers Northwestern Division Missouri River Basin Water Management Division Omaha, Nebraska September 2011 This page intentionally left blank. Missouri River Mainstem Reservoir System Summary of Actual 2010 Regulation Table of Contents Section No. Title Page I. FOREWORD .......................................................................................................................1 II. REVIEW OF REGULATION FROM JANUARY - DECEMBER 2010 ...........................1 A. General .....................................................................................................................1 B. Precipitation and Water Supply Available in 2010 ..................................................1 1. Plains Snowpack ..........................................................................................1 2. Mountain Snowpack ....................................................................................2 3. Weather Conditions .....................................................................................8 4. 2010 Calendar Year Runoff .......................................................................18 C. System Regulation – January to December 2010 ..................................................19 1. System Regulation – January to December ...............................................19 2. Fort Peck Regulation – January to December ............................................24 3. Garrison Regulation – January to December .............................................26 4. Oahe and Big Bend Regulation – January to December 2010 ...................29 5. Fort Randall Regulation – January to December 2010 ..............................34 6. Gavins Point Regulation – January to December 2010 .............................36 D. Non-Routine Regulation and Other Items Pertaining to System Regulation ........40 1. Lawsuits .....................................................................................................40 2. Intrasystem Unbalancing and Fort Peck Mini-Test ...................................41 3. Summary of Drought Impacts ....................................................................41 4. Summary of Flood Events below Gavins Point .........................................42 E. Reservoir Elevations and Storage ..........................................................................47 F. Summary of Results ...............................................................................................48 1. Flood Control .............................................................................................48 2. Irrigation ....................................................................................................48 3. Water Supply and Water Quality Control ..................................................49 4. Navigation ..................................................................................................57 5. Power–Eastern Division, Pick-Sloan Missouri Basin Program (P-S MBP) ...................................................................................64 6. Fish Management .......................................................................................68 7. Threatened and Endangered Species .........................................................68 8. Recreation and Resource Management ......................................................72 9. Cultural Resources .....................................................................................73 List of Tables .................................................................................................................................. ii List of Figures ................................................................................................................................. ii List of Plates .................................................................................................................................. iii List of Abbreviations and Acronyms ............................................................................................. iv Definition of Terms........................................................................................................................ vi i LIST OF TABLES No. Title Page 1 2010 Calendar Year Runoff for Selected Reaches ............................................................19 2 Missouri River Basin Calendar Year 2010 Runoff above Sioux City, Iowa .....................22 3 Fort Peck – Inflows, Releases, and Elevations ..................................................................24 4 Garrison – Inflows, Releases, and Elevations ....................................................................27 5 Oahe – Inflows, Releases, and Elevations .........................................................................30 6 Big Bend – Inflows, Releases, and Elevations ..................................................................31 7 Fort Randall – Inflows, Releases, and Elevations ..............................................................35 8 Gavins Point – Inflows, Releases, and Elevations .............................................................37 9 2010 Peak Discharges below Gavins Point Dam ...............................................................44 10 Reservoir Levels and Storages – July 31, 2010 .................................................................47 11 Reservoir Levels and Storages – December 31, 2010 .......................................................47 12 Water Quality Issues and Concerns ...................................................................................55 13 Missouri River Tonnage by Commodities .........................................................................58 14 Navigation Season Target Flows .......................................................................................61 15 Missouri River Navigation Tonnage and Season Length ..................................................62 16 Gross Federal Power System Generation ..........................................................................66 17 Historical Generation and Load Data - Peaks ....................................................................67 18 Historical Generation and Load Data - Total .....................................................................67 19 Missouri River System Interior Least Tern Survey Data ...................................................70 20 Missouri River System Piping Plover Survey Data ...........................................................71 21 Visitation at System Reservoirs .........................................................................................73 ii LIST OF FIGURES No. Title Page 1 NOHRSC Map - December 31, 2009 Plains Snow Water Equivalent……………. ...........3 2 NOHRSC Map - February 28, 2010 Plains Snow Water Equivalent……………. .............4 3 NOHRSC Map - March 15, 2010 Plains Snow Water Equivalent……….. ........................5 4 Missouri River Basin Mountain Snowpack Water Content 2009–2010 ..............................9 5 Percent of Normal Precipitation Maps ...............................................................................10 6 Drought Severity Maps ..................................................................................................... 11 7 Missouri River Annual Runoff above Sioux City, Iowa ....................................................20 8 Missouri River Basin 2010 Monthly Runoff above Sioux City, Iowa ..............................21 9A May, June and July 2010 Annual Peak Discharges below Gavins Point Dam ..................43 9B Missouri River Peak Stage Reductions Due to Corps Reservoir Operations in 2010 .......43 10 Average Incremental Flows for June 2010 for the Missouri River from Gavins Point Dam to Hermann, MO .......................................................................................................46 11A End of July Pool Elevations for Fort Peck and Garrison ...................................................50 11B End of July pool Elevation for Oahe and Total System Storage .......................................51 12A Mainstem Reservoirs Flood Damages Prevented – Indexed to September 2010 ..............52 12B Mainstem Reservoirs Flood Damages Prevented – Original Price Levels………….. ......52 13 Actual and Unregulated Flows – Sioux City, IA, Nebraska City, NE, and St Joseph, MO .......................................................................................................53 14A Missouri River Total Navigation Tonnage ........................................................................59 14B Missouri River Commercial Navigation Tonnage ............................................................59 15A Total Navigation Tonnage Value - 2011 Present Worth ...................................................60 15B Commercial Navigation Tonnage Value - 2011 Present Worth ........................................60 16 Missouri River Flows – Sioux City, IA, Nebraska City, NE, and Kansas City, MO……63 17 Mainstem Power Generation, 1954 to 2010 ......................................................................65 18 System Project Visitation, 1954 to 2010............................................................................74 LIST OF PLATES No. Title 1 Missouri River Basin Map 2 Summary of Engineering Data – Missouri River Mainstem