4. 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

13. 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

14. Agassiz NWR Total Water Storage Agassiz NWR Total Water Storage
Storage (acre feet)
Description
35,030
Winter Storage (1997)
61,432
Gated Storage
116,036
Ungated Storage
                                                                                                          
Agassiz NWR Total Water Storage
Storage (acre feet)
Description
35,030
Winter Storage (1997)
61,432
Gated Storage
116,036
Ungated Storage

15. Agassiz Pool (Mud Lake) Storage Capacity
Elevation
Storage (acre/feet)
Description
1136
1137
225
1138
2,425
1139
7,585
average winter level
1139.5
11,515
1140
15,445
1141
25,410
gated storage
1142
36,480
1143
48,510
59,390
1997 highest spring flood level
1144
61,310

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

17. May 20, 2005 Thief River Entering Agassiz Pool

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