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A look at area bridges' ratings

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Here's a look at raw data on some of the many area bridges spanning the Mississippi and St. Croix rivers, according to a United States Department of Transportation National Bridge Inventory database. On the scale used by federal authorities, zero denotes a bridge "beyond corrective action" while nine indicates one in excellent condition. For comparison, the Minneapolis bridge that collapsed had the following ratings: Deck-5, superstructure-4, substructure-6. A rating of four or below is considered structurally deficient.

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Interstate 94 Eastbound over the St. Croix River

Constructed: 1994

Maximum span: 1,189 ft.

Cars per day: 41,000 (as of 2004)

United States Department of Transportation National Bridge Inventory ratings:

Deck 7

Superstructure 8

Substructure 8

Interstate 94 Westbound over the St. Croix River

Constructed: 1971

Maximum Span: 1,189 ft.

Cars per day: 41,000 (2004)

United States Department of Transportation National Bridge Inventory ratings:

Deck 8

Superstructure 6

Substructure 6

U.S. Highway 10 over the St. Croix

Constructed: 1990

Maximum span: 626 ft.

Cars per day: 13,500 (2004)

United States Department of Transportation National Bridge Inventory ratings:

Deck 6

Superstructure 7

Substructure 7

Highway 36 (Stillwater Lift Bridge) over the St. Croix River

Constructed: 1930

Maximum span:

Cars per day: 18,000 (2004)

United States Department of Transportation National Bridge Inventory ratings:

Deck 4

Superstructure 3

Substructure 5

Interstate 494 over the Mississippi River

Constructed: 2003

Maximum span: 1,420 ft.

Cars per day: 44,500 (2004)

United States Department of Transportation National Bridge Inventory ratings:

Deck 9

Superstructure 9

Substructure 9

Highway 61 (Hastings High Bridge) over the Mississippi River

Constructed: 1950

Maximum span: 1,567 ft.

Cars per day: 32,500 (2004)

United States Department of Transportation National Bridge Inventory ratings:

Deck 5

Superstructure 5

Substructure 5

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