1- Point Pleasant Bridge Disaster:

The Point Pleasant Bridge (Silver Bridge) was an eyebar-chain suspension bridge built in 1928 and named for the color of its aluminum paint. The bridge connected Point Pleasant, West Virginia and Gallipolis, Ohio, over the Ohio River. On December 15, 1967, the Silver Bridge collapsed while it was full of rush-hour traffic, resulting in the deaths of 46 people. Two of the victims were never found. Investigation of the wreckage pointed to the cause of the collapse being the failure of a single eyebar in a suspension chain, due to a small defect 0.1 inch (2.5 mm) deep. Analysis showed that the bridge was carrying much heavier loads than it had originally been designed for and had been poorly maintained. More details

2. Mianus River Bridge Disaster:

The Mianus River Bridge carries Interstate 95 over the Mianus River in the Cos Cob section of Greenwich, Connecticut. The bridge had a 100-foot (30.5 m) section of its deck of its northbound span collapse on June 28, 1983. Three people were killed when two cars and two tractor-trailers fell with the bridge into the Mianus River 70 feet (21.3 m) below; three were seriously injured. Casualties from the collapse were few because the disaster occurred at 1:30 a.m., when traffic was low on the often crowded highway. The replacement span is officially named the Michael L. Morano Bridge, after a state senator who represented Greenwich. More details

3. Lacey V. Murrow Bridge Disaster:

In 1990, the original Lacey V. Murrow Bridge sank because of a series of human errors and decisions. The process started because the bridge needed resurfacing and was to be widened by means of cantilevered additions in order to meet the necessary lane-width specifications of the Interstate Highway System. The Washington State Department of Transportation decided to use hydro-demolition to remove unwanted material. Water from this hydro-demolition was considered contaminated under environmental law and could not be allowed to flow into Lake Washington. Engineers then analyzed the pontoons of the bridge, and realized that they were over-engineered and the water could be stored temporarily in the pontoons. More details

4. Cline Avenue Bridge Disaster:

State Road 912 (SR 912), known along its entire length as Cline Avenue, is a freeway north of the combined Interstate 80/I-94/U.S. Highway 6 (I-80/I-94/US 6, Borman Expressway), and a local access road serving Griffith south of the Borman. The portion of Cline Avenue marked as SR 912 is 11.69 miles (18.81 km) long. On April 15, 1982, part of a ramp under construction collapsed during concrete pouring operations near the Indiana Harbor and Ship Canal, killing twelve highway workers and injuring eighteen more. In 1987, the state designated the route between US 12 and the Indiana Toll Road as the Highway Construction Workers Memorial Highway. More details

5. Schoharie Creek Bridge Disaster:

The Schoharie Creek Bridge was a New York State Thruway bridge over the Schoharie Creek near Fort Hunter, in New York State. On April 5, 1987 it collapsed due to bridge scour at the foundations after a record rainfall. The collapse killed ten people. The failure of the Schoharie Creek Bridge motivated improvement in bridge design and inspection procedures. More details

6. Cypress Street Viaduct Disaster:

The Cypress Street Viaduct, often referred to as the Cypress Structure, was a 1.6 mile long, raised two-tier, multi-lane freeway constructed of reinforced concrete that was originally part of the Nimitz Freeway in Oakland, California. On October 17, 1989, the portion of the structure from 16th Street north all the way to the MacArthur Maze collapsed during the 1989 Loma Prieta earthquake, due to ground movement and structural flaws. More details

7. Sunshine Skyway Bridge Disaster:

On May 9, 1980, a cargo ship struck the Sunshine Skyway Bridge in Tampa Bay, the bridge collapsed and sent cars and a Greyhound bus hurdling into the water below. Thirty-five people were killed. A new bridge replaced an older bridge opened to traffic on April 20, 1987. More details

8. I-40 Bridge Disaster:

The I-40 bridge disaster was a bridge collapse that occurred southeast of Webbers Falls, Oklahoma at 7:45 a.m. on May 26, 2002. Joe Dedmon, captain of the towboat Robert Y. Love, experienced a blackout and lost control of the tow. This, in turn, caused the barges he was controlling to collide with a bridge pier. The result was a 580-foot (176.78 m) section of the Interstate 40 bridge plunging into Robert S. Kerr Reservoir on the Arkansas River. Fourteen people died and eleven others were injured when several automobiles and tractor-trailers fell from the bridge. More details

9. I-35W Mississippi River Bridge Disaster:

The I-35W Mississippi River bridge was an eight-lane, steel truss arch bridge that carried Interstate 35W across the Saint Anthony Falls of the Mississippi River in Minneapolis, Minnesota, United States. During the evening rush hour on August 1, 2007, it suddenly collapsed, killing 13 people and injuring 145. The bridge was Minnesota's third busiest, carrying 140,000 vehicles daily. The NTSB cited a design flaw as the likely cause of the collapse, noting that a too-thin gusset plate ripped along a line of rivets, and asserted that additional weight on the bridge at the time of the collapse contributed to the catastrophic failure. More details

10. Tacoma Narrows Bridge Disaster:

The 1940 Tacoma Narrows Bridge, the first Tacoma Narrows Bridge, was a suspension bridge in the U.S. state of Washington that spanned the Tacoma Narrows strait of Puget Sound between Tacoma and the Kitsap Peninsula. It opened to traffic on July 1, 1940, and dramatically collapsed into Puget Sound on November 7 of the same year. At the time of its construction (and its destruction), the bridge was the third longest suspension bridge in the world in terms of main span length, behind the Golden Gate Bridge and the George Washington Bridge. More details