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Old 06-22-2017, 05:52 PM   #1
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City: Southport, Florida
Country: USA
Vessel Name: FROLIC
Vessel Model: Mainship 30 Pilot II since 2015. Owned wooden 1972 Grand Banks 42 from 1986 to 2015
Join Date: Oct 2007
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Estimating upper Mississippi currents

The owner of the boat I am delivering to Lake Michigan from the Gulf Coast got the bright idea of emailng the River Gages folks about the question of potential currents. His response is below:

The general rule of thumb we use is based upon the St. Louis gage height:

St. Louis greater than 30 ft:
Straight Reaches ~ 5.5-6.5 ft/s (3.7-4.4 mph)
Bendway Reaches ~ 8.5-9.5 ft/s (5.8-6.5 mph)

St. Louis at 15 ft:
Straight Reaches ~ 5.0 ft/s (3.4 mph)
Bendway Reaches ~ 7.0 ft/s (4.8 mph)

St. Louis less than 5 ft:
Straight Reaches ~ 3.5-4.5 ft/s (2.4-3.1 mph)
Bendway Reaches ~ 4.5-6.5 ft/s (3.1-4.4 mph)
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Rich Gano
FROLIC (2005 MainShip 30 Pilot II)
Panama City area
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