19 Structurally Deficient Bridges That Americans Drive Over Every Day

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Bridge inspectionBusiness Insider's Henry Blodget recently wrote on the need for infrastructure spending in the United States.

Something that drives that point home is how badly some of our essential infrastructure has decayed. As of last year, 11.5 percent of US bridges, crossed by an average of 282,672,680 vehicles daily, were graded as structurally deficient by the Federal Highway Administration.

Private construction is way up, but reduced public spending is a drag on the economy.

When we have 8.2 percent unemployment, historically low borrowing rates, and a stagnant recovery, we need to be fixing this and building better infrastructure for the future. Here's somewhere we can start.

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19 Structurally Deficient Bridges That Americans Drive Over Every Day
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19 Structurally Deficient Bridges That Americans Drive Over Every Day

Average daily traffic on this bridge: 304,000 vehicles

Sufficiency rating: 60 percent

Why is it deficient?: The bridge is rated "functionally obsolete, meaning that it is "no longer by design functionally adequate for its task." 

Percentage of structurally deficient bridges in California: 12.8 percent 

Daily statewide traffic on deficient bridges: 82,647,465 vehicles

Average Daily Traffic: 203,000 vehicles

Sufficiency rating: 24.5 percent

Why is it deficient?: The NHA rates the condition of the bridge's superstructure as "serious", and its structural evaluation states that its condition is "basically intolerable requiring high priority of corrective action."

Percentage of structurally deficient bridges in Colorado: 6.8% percent 

Daily statewide traffic on deficient bridges: 5,117,359 vehicles

Average Daily Traffic: 191,940 vehicles

Sufficiency rating: 52 percent

Why is it deficient?: According to the NHA, the bridge's deck and superstructure are in poor condition. 

Percentage of structurally deficient bridges in New Jersey: 10.3 percent 

Daily statewide traffic on deficient bridges: 11,324,590 vehicles

Average Daily Traffic: 190,204 vehicles

Sufficiency rating: 56.9 percent

Why is it deficient?: According to the NHA, the bridge's deck is in poor condition. 

Percentage of structurally deficient bridges in Maryland: 6.9 percent 

Daily statewide traffic on deficient bridges: 4,613,962 vehicles

Average Daily Traffic: 183,925 vehicles

Sufficiency rating: 32.1 percent

Why is it deficient?: According to the NHA, the bridge's deck and superstructure are in poor condition. 

Percentage of structurally deficient bridges in Hawaii: 12.4 percent 

Daily statewide traffic on deficient bridges: 1,800,369 vehicles

Average Daily Traffic: 172,000 vehicles

Sufficiency rating: 68.3 percent

Why is it deficient?: According to the NHA, the bridges deck is in poor condition. 

Percentage of structurally deficient bridges in Florida: 2.4 percent 

Daily statewide traffic on deficient bridges: 1,750,483 vehicles

Average Daily Traffic:  169,791 vehicles

Sufficiency rating: 49 percent

Why is it deficient?: According to the NHA, the bridge's substructure is in poor condition. 

Percentage of structurally deficient bridges in New York: 12.0 percent 

Daily statewide traffic on deficient bridges: 15,096,756 vehicles

Average Daily Traffic:  169,000 vehicles

Sufficiency rating: 67.9 percent 

Why is it deficient? The bridge is rated "functionally obsolete, meaning that it is "no longer by design functionally adequate for its task."

Percentage of structurally deficient bridges in Massachusetts: 11.0 percent 

Daily statewide traffic on deficient bridges: 10,408,421 vehicles

Average Daily Traffic: 162,400 vehicles

Sufficiency Rating: 34 percent

Why is it deficient? The NHA rates the bridges deck and superstructure as being in critical condition, and the bridge as "basically intolerable requiring high priority of replacement"

Percentage of structurally deficient bridges in Illinois: 8.5 percent 

Daily statewide traffic on deficient bridges: 8,136,203 vehicles

Average Daily Traffic:  156,400 vehicles

Sufficiency Rating: 34.1 percent

Why is it deficient? The NHA rates the bridge's superstructure as in serious condition, and the bridge as "basically intolerable requiring a high priority of corrective action."

Percentage of structurally deficient bridges in Rhode Island: 21.6 percent 

Daily statewide traffic on deficient bridges: 3,000,502 vehicles

Average Daily Traffic:  154,000 vehicles

Sufficiency rating: 64 percent

Why is it deficient?: According to the NHA, the bridge's deck, superstructure, and substructure are in poor condition. 

Percentage of structurally deficient bridges in Minnesota: 8.8 percent 

Daily statewide traffic on deficient bridges: 2,436,031 vehicles

Average Daily Traffic: 148,200 vehicles

Sufficiency rating: 81 percent

Why is it deficient?: The bridge is rated "functionally obsolete, meaning that it is "no longer by design functionally adequate for its task."

Percentage of structurally deficient bridges in Nevada: 2.2 percent 

Daily statewide traffic on deficient bridges: 251,365 vehicles

Average Daily Traffic: 146,370 vehicles

Sufficiency rating: 57 percent

Why is it deficient?: According to the NHA, the substructure is in poor condition. 

Percentage of structurally deficient bridges in Ohio: 9.8 percent 

Daily statewide traffic on deficient bridges: 11,157,457 vehicles

Average Daily Traffic: 146,000 vehicles

Sufficiency rating: 48.0 percent

Why is it deficient? According to the NHA, the superstructure of the bridge is in poor condition, and the deck is in serious condition. 

Percentage of structurally deficient bridges in Michigan: 13.1 percent 

Daily statewide traffic on deficient bridges: 8,764,101 vehicles

Average Daily Traffic: 144,000 vehicles

Sufficiency rating: 66 percent

Why is it deficient?: The bridge is rated "functionally obsolete, meaning that it is "no longer by design functionally adequate for its task."

Percentage of structurally deficient bridges in Kentucky: 9.5 percent 

Daily statewide traffic on deficient bridges: 4,502,538 vehicles

Average Daily Traffic: 146,620 vehicles

Sufficiency rating: 32 percent

Why is it deficient?: The NHA rates the superstructure as in poor condition. 

Percentage of structurally deficient bridges in Alabama: 9.9 percent 

Daily statewide traffic on deficient bridges: 3,309,811 vehicles

Average Daily Traffic: 141,200 vehicles

Sufficiency rating: 42.1

Why is it deficient?: According to the NHA, the bridge's deck and superstructure are in poor condition. 

Percentage of structurally deficient bridges in Connecticut: 9.2 percent 

Daily statewide traffic on deficient bridges: 4,482,324 vehicles

Average Daily Traffic: 115,000 vehicles

Sufficiency rating: 51 percent

Why is it deficient?: According to the NHA, the bridge's deck and superstructure are in poor condition.

Percentage of structurally deficient bridges in Virginia: 9.4 percent 

Daily statewide traffic on deficient bridges: 6,758,887 vehicles

Average Daily Traffic: 85,801 vehicles

Sufficiency rating: 49

Why is it deficient?: According to the NHA, the substructure is in poor condition. 

Percentage of structurally deficient bridges in Pennsylvania: 26.5 percent 

Daily statewide traffic on deficient bridges: 22,773,880 vehicles

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Note on terminology: A sufficiency rating is a measure of a bridge's sufficiency to stay in service based on four separate factors. A deck is the bridge's supporting surface, the superstructure supports the deck, and the substructure is the bridge's foundation.
Each of the following bridges is on the FHA's list, and has a sufficiency rating below 80, which is the threshold below which a bridge is considered deficient.
Source: National Bridge Inventory, Transportation For America


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