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U.S. Army Corps of Engineers St. Paul District Programs & Project Management 332 Minnesota St., Suite E1500 St. Paul, MN 55101
(651) 290-5755
cemvp-pm@usace.army.mil
The purpose of this study was to investigate the effectiveness of various flood risk reduction measures basin-wide to reduce main stem peak flows by 20% for the larger rare events such as the 0.5% (200-year) and 0.2% (500-year) chances of exceedance floods.
The Red River of the North rises in Lake Traverse near Wheaton, Minnesota, and flows north toward Canada and ultimately to Lake Winnipeg. This is a basin-wide study in Minnesota and North Dakota.
The Red River Basin Commission produced the Long-Term Flood Study (LTFS) in 2011 after the 2009 flood. Minnesota and North Dakota expressed the need for a coordinated, comprehensive, proactive plan that responds to and mitigates flooding and flood damages throughout the Red River Watershed. The 2011 LTFS report provided 48 recommendations ranging from immediate needs and critical risks to long-term studies. A 2015 status report showed that substantial progress had been made for approximately 20% of the recommendations but that limited or no progress had been made for approximately 50% of the recommendations. The focus of this study was the 0.5% (200-year) and 0.2% (500-year) chances of exceedance floods.
Study tasks included updating hydrology models with sensitivity to climate variability and other factors such as storage, impacts of changed hydrology on levee certification, analysis of risk reduction goals, effectiveness of flood plain regulations, and stormwater management.
A partnership agreement between the U.S. Army Corps of Engineers and the sponsor (the Red River Basin Commission) was executed in November 2018. The sponsor will meet all or a portion of their cost-share requirements through work-in-kind efforts. Both phases of the project are complete. The project is currently in closeout.
Phases 1 and 2:
This work is authorized by Section 22 of the Water Resources Development Act of 1974 (Public Law 93-251), as amended. The study was conducted under the U.S. Army Corps of Engineers’ Planning Assistance to States (PAS) program, following a 50/50 cost-share formula with the nonfederal sponsor. The sponsor may contribute additional funds beyond this formula.
The following is a summary of the funds required for the Red River Basin LTFS PAS Project:
Total federal funds $325,000 Total cost-share partner funds $325,000 Total study cost for Phases 1 and 2 $650,000