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Items of interest
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2004/2006
Comparison
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The eight Congressionally authorized purposes of flood control, navigation, water supply, water quality control, irrigation, recreation, hydropower and fish and wildlife, including threatened and endangered species.
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No Change
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Rule Curves, also referred to as March 15, July 1 and September 1 System Storage Checks (e.g., Tables VII-2, VII-3 and VII-5), used to determine service level for the first half of the navigation season (March 15), service level for the season’s second half and season length (July 1), and the Gavins Point winter release rate (September 1)
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No Change
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Flood control storage designation of 16.3 Million Acre Feet (MAF), 11.6 MAF in the Annual Flood Control and Multiple Use Zone and 4.7 MAF in the Exclusive Flood Control Zone.
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No Change
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Plate VI-1 used in determining the service level and subsequent System release for flood storage evacuation purposes
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No Change
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Gavins Point bimodal spring pulse (conducted in 2006, 2008 and 2009)
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Removed
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Reservoir unbalancing at Fort Peck, Garrison and Oahe (never conducted)
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Removed
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Chapter IV – Project Descriptions
Current status of the project features and Missouri River reaches downstream of all projects. For example, spillways at Garrison and Big Bend were first used in 2011 and the Fort Peck spillway required repairs after 2011
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Includes post-2011 flood repairs to Mainstem dams
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Chapter V – Data Collection and Communication
Information Technology (IT): Data retrieval, data processing, data storage, and data dissemination
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Documents modern IT processes
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How USACE and Missouri River Basin Water Management communicates to and engages with basin stakeholders regarding System regulation
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Reflects current communication practices
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Chapter VI – Hydrologic Forecasts
Advancements to hydrologic, reservoir and river modeling capabilities
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Upgraded modeling software & capabilities
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Technical reports used in planning and real-time System regulation, including post-2011 data points
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Updated reports with additional post-2011 data
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Chapter VII – Current Water Control Plan
Text updated to reflect record minimum and peak extremes for all authorized purposes
2000-2007 drought data reflects record-low System storage.
2011 runoff data reflects record for: peak System storage, upper basin runoff; record-high releases from all System projects
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Includes extremes for 2000-2007 drought and 2011 peak runoff, storage, and releases
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Appendices
Every appendix (e.g., Appendix A - floods and droughts, Appendix E - water supply)
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Reflects current conditions and data points
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Plates
All climate/weather plates - reflect current 30-year averages (1981-2010)
All project-related information (e.g., tailwater rating curves, pool-duration and release-frequency relationships) - reflect the updated technical reports
Summary tables (e.g., recreation visitation, hydropower generation, flood damages prevented, navigation tonnage) - reflect current conditions
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Includes current 30-year averages, Technical Report data points, and activity summaries
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