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Click on the image above to bring up a large .pdf map of the chief dredging spots on the lower Minnesota River. (Map: courtesy Army Corps of Engineers).
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lower minnesota river cuts
The last dredging of the lower Minnesota River occurred August 23 through September 8, 2004 at the Savage and Peterson’s bars (no. 5 and no. 3 in the chart below), the historical problem areas. “But there might be stretches,” says Steve Tapp of the COE, “where we need dredging every year for three straight years, then we won’t dredge again for three more years. It depends on the hydrology, high water events in the spring, and other factors.”
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One cut that fills in often is above the Savage railroad bridge, at mile 14.5 (no. 5 below)
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The cut that fills in most frequently is at Peterson’s Bar, about mile 12 (no. 3 below)
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Several private company slips require dredging, from mile 12.8 to mile 14.7. (no. 4–S5 below)
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Projected
Dredging Quantities for |
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Cut
# |
Cut
Name |
Location |
Avg./Job |
Frequency |
Number
of Events |
27-Year Projection |
|
1 |
Mouth
of the MN River |
0.0-1.1 |
18,000
|
11% |
3 |
54,000
|
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2 |
4-Mile
Cut-off |
3.4-4.4 |
9,000
|
11% |
3 |
27,000
|
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3 |
Peterson's
Bar |
11.3-12.4 |
27,000
|
55% |
15 |
405,000
|
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4 |
Cargill |
12.5-13.6 |
7,200
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11% |
3 |
21,600
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5 |
Savage
|
14.3-14.7 |
20,250
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31% |
8 |
162,000
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S1 |
Cargill
East Slip |
12.7 |
14,400
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55% |
15 |
216,000
|
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S2 |
Richards
Asphalt Slip |
14.4 |
0
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0% |
0 |
0
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S3 |
Bunge
Slip |
14.5 |
4,500
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44% |
12 |
54,000
|
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S4 |
Harvest
States Slip |
14.6 |
5,800
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53% |
14 |
81,200
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S5 |
Cargill
West Slip |
14.7 |
11,300
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43% |
12 |
135,600
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Total
27-Year Projection = |
1,156,400 |
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Source: COE Oct. 2000 Dredged Material Management Plan.