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History

When the current I-10 Calcasieu River bridge opened for traffic in 1952, it was designed for a traffic load of 37,000 per day and a 50-year life span. In 2016, the average daily crossings were over 80,000. The need for a replacement bridge was first discussed in the 1980s – well over 30 years ago.

The National Bridge Inventory (NBI) has rated the bridge a 6.6 out of 100. By comparison, the Interstate 35 West Mississippi River Bridge in Minneapolis, Minnesota, was rated a 50 when it collapsed. NBI rates the I-10 Calcasieu River bridge deck, superstructure and substructure as “Serious Condition” with the structural evaluation as “basically intolerable requiring high priority of corrective action.” NBI defines “serious condition” as “Loss of section, deterioration, spalling or scour have seriously affected primary structural components. Local failures are possible. Fatigue cracks in steel or sheer cracks in concrete may be present.”

History

When the current I-10 Calcasieu River bridge opened for traffic in 1952, it was designed for a traffic load of 37,000 per day and a 50-year life span. In 2016, the average daily crossings were over 80,000. The need for a replacement bridge was first discussed in the 1980s – well over 30 years ago.

The National Bridge Inventory (NBI) has rated the bridge a 6.6 out of 100. By comparison, the Interstate 35 West Mississippi River Bridge in Minneapolis, Minnesota, was rated a 50 when it collapsed. NBI rates the I-10 Calcasieu River bridge deck, superstructure and substructure as “Serious Condition” with the structural evaluation as “basically intolerable requiring high priority of corrective action.” NBI defines “serious condition” as “Loss of section, deterioration, spalling or scour have seriously affected primary structural components. Local failures are possible. Fatigue cracks in steel or sheer cracks in concrete may be present.”

History

When the current I-10 Calcasieu River bridge opened for traffic in 1952, it was designed for a traffic load of 37,000 per day and a 50-year life span. In 2016, the average daily crossings were over 80,000. The need for a replacement bridge was first discussed in the 1980s – well over 30 years ago.

When the current I-10 Calcasieu River bridge opened for traffic in 1952, it was designed for a traffic load of 37,000 per day and a 50-year life span. In 2016, the average daily crossings were over 80,000. The need for a replacement bridge was first discussed in the 1980s – well over 30 years ago.

History

When the current I-10 Calcasieu River bridge opened for traffic in 1952, it was designed for a traffic load of 37,000 per day and a 50-year life span. In 2016, the average daily crossings were over 80,000. The need for a replacement bridge was first discussed in the 1980s – well over 30 years ago.

The National Bridge Inventory (NBI) has rated the bridge a 6.6 out of 100. By comparison, the Interstate 35 West Mississippi River Bridge in Minneapolis, Minnesota, was rated a 50 when it collapsed. NBI rates the I-10 Calcasieu River bridge deck, superstructure and substructure as “Serious Condition” with the structural evaluation as “basically intolerable requiring high priority of corrective action.” NBI defines “serious condition” as “Loss of section, deterioration, spalling or scour have seriously affected primary structural components. Local failures are possible. Fatigue cracks in steel or sheer cracks in concrete may be present.”