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At the headwaters, the depth is 3 feet. The deepest part is at New Orleans where it reaches 200 feet.
Through Lake Pepin the average depth is between 20 and 32 feet. Overall, on average, the depth is at least 12 feet to allow for commercial navigation in the main channel.

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8y ago
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13y ago

Just measured using Google Earth on both sides of the Eads Bridge - average width 1880 feet.

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10y ago

At the Arch grounds the river is 1,850ft (0.35mi). At the confluence north of St. Louis the river is closer to a half mile wide.

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15y ago

It averages about 30 feet.

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13y ago

In the current about 250ft.

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12y ago

1mile

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13y ago

700 ft

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Anonymous

Lvl 1
4y ago

3ft

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Q: How deep is St. Louis river?
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