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Agassiz National Wildlife Refuge: A Sanctuary for Diverse Wildlife

Explore Agassiz NWR, spanning 61,500 acres with 40,100 acres of wetlands and supporting 280 bird, 49 mammal, 12 amphibian, and 9 reptile species. Learn how the refuge managed the 1997 Spring Flood and controlled outflow to protect its ecosystem.

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Agassiz National Wildlife Refuge: A Sanctuary for Diverse Wildlife

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  1. Agassiz National Wildlife Refuge • 61,500 acres • 40,100 acres of wetlands • 280 species of birds • 49 species of mammals • 12 species of amphibians • 9 species of reptiles

  2. 1997 Spring Flood • 6 day period AVERAGE Inflow = 6,000cfs based on water level rise in pools. • After that period managed outflow = • From the Agassiz Control structure = 1,064cfs • Total outflow from all structures and spillways =3,800 cfs

  3. September 26, 1985Ditch 11 Delta in Agassiz Pool

  4. May 20, 2005 Thief River Entering Agassiz Pool

  5. 2002 2004

  6. 450000 400000 350000 300000 250000 200000 150000 100000 50000 0 1965 1967 1969 1971 1973 1975 1977 1979 1981 1983 1985 1987 1989 1991 1993 1995 1997 1999 2001 2003 Outflow and Precipitation 1965 to 2004Agassiz NWR 30 25 20 15 10 5 Outflow in Acre-feet Outflow without Farmes Pool Precipitation in Inches

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