Missouri Mainstem Master Manual

2018 Edition – Comparative Summary

Missouri River Water Management
Published Dec. 4, 2018

Items of interest



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.

No Change

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)

No Change

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.

No Change

Plate VI-1 used in determining the service level and subsequent System release for flood storage evacuation purposes

No Change

Gavins Point bimodal spring pulse (conducted in 2006, 2008 and 2009)


Reservoir unbalancing at Fort Peck, Garrison and Oahe (never conducted)


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

Includes post-2011 flood repairs to Mainstem dams

Chapter V – Data Collection and Communication

Information Technology (IT): Data retrieval, data processing, data storage, and data dissemination

Documents modern IT processes

How USACE and Missouri River Basin Water Management communicates to and engages with basin stakeholders regarding System regulation

Reflects current communication practices

Chapter VI – Hydrologic Forecasts

Advancements to hydrologic, reservoir and river modeling capabilities

Upgraded modeling software & capabilities

Technical reports used in planning and real-time System regulation, including post-2011 data points

Updated reports with additional post-2011 data

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

Includes extremes for 2000-2007 drought and 2011 peak runoff, storage, and releases


Every appendix (e.g., Appendix A - floods and droughts, Appendix E - water supply)

Reflects current conditions and data points


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

Includes current 30-year averages, Technical Report data points, and activity summaries