118 Ws knott company Images: LOC's Public Domain Archive Public Domain Search

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

Upper Mississippi River 9-Foot Channel, Lock & Dam No. 4, Alma, Buffal...

Significance: This lock and dam was the first constructed as part of the Upper Mississippi River Nine-Foot Channel Project. It contains the standard items on most of the lock and dam structures in this project... More

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