Washington State Bridge Executive Summary

Tacoma Narrows Bridge was opened to the public on July 1st 1940 after being in construction for 2 years. The structure was built 5,939-foot-long with a span of 2800 feet in order to bridge the gap between Tacoma and Gig Harbour in the state of Washington, USA. It became known as “Galloping Gertie” due to the fact that the bridge

Sometimes the wind would not be perpendicular, in which the oscillation of the bridge was less, but there was still some oscillation. On November 7th, 1940, the Tacoma Bridge collapsed because the oscillation of the bridge became extreme. The oscillation of the bridge was caused by a wind speed of 42 mph (HistoryLink.org). After, approximately, an hour of a corkscrew like motion, the bridge collapsed into Puget Sound. This marked a huge turning point in the design of suspension bridges from that point in time to current time.

In Washington, the Interstate 5 bridge, which crossed the Skagit River, collapsed last month. The damage of this accident included two cars broke and three persons injured. According to officials, the bridge fell into the river after the large truck hit a beam. The bridge had a risky condition called facture critical. The U.S has a lot of bridges; however, nearly two thousand bridges were built between the middle of 1950s and the 1970s, so those ones are obsolete bridges. In addition, back then, the government cut corners in bridge buildings to cost reduction. Although gas and diesel taxes attempted to allocate to restored the bridge, the government cloud not collect money enough to repair the bridge because people began to use efficient vehicle.

The I-35W Mississippi river bridge also known as Bridge 9340 officially was an eight-lane, steel truss arch bridge which carried the Interstate 35W across the Mississippi river connected the downtown east and Marcy-Holmes. Its construction began in the year 1964, was finally opened in 1967. It connected the northeast of Metrodome on its south end and the University of Minnesota on the North end. The bridge was the boundary of “Mississippi Mile” downtown riverfront parkland. The north foundation of the bridge was near the hydroelectric plant built in 1988. The south abutment was in an area polluted by the coal gas processing plant. There weren’t any mentions of this in the failure investigations. The bridge was a continuous truss bridge that had a total span of 1,907 ft. It was an 8-lane bridge having a width of 113.3ft. and was 115 ft. high. It was designed by Sverdrup & Parcel to 1961 AASHO (American Association Of State Highway Officials) standard specifications. The construction contract worth more than US $5.2 million at the time, went to Hurcon Inc. and Industrial Construction Company, which built the steel trusses and deck. The piers were not built in the navigation channel instead the center span of the bridge consisted of a single 456- foot steel truss over a 390-foot channel being the longest span of the bridge.

Sam: A real life bridge that is similar to our household bridge is the Hoffstadt Bridge. The Hoffstadt Bridge is a truss bridge 96 miles south of Seattle Washington. (show picture)This bridge connects Hoffstadt Creek and Hoffstadt Mountain. The Hoffstadt Bridge is 2,340 feet long, or about 712 meters. Similar to our bridge, this bridge is supported by trusses on the bottom. The Hoffstadt Bridge also has a flat deck such as ours.

The Tex Wash Bridge was built in 1967, listed as functionally obsolete in 2014, and failed do to collapsing in July of 2015. After 2014 inspections were made and no flaws were detected so it was left unchanged. In 1967, the construction crew had the task of spanning the Tex Wash to connect the freeway between California and Arizona along the Chuckwalla Mountains. They decided the best, and most cost effective, way of doing this is by channeling a dry riverbed and narrowing it where the bridge was to stand. The columns of the bridge were to stand on their foundations which was sitting on the soil and the banks of the bridges were given large rocks to protect their foundation from being washed away (Kelman).

There are many differences between our bridge and other bridges. One being location. Another one being that thing that was sacrificed for it. Another one being cost. Also another difference would be weight and capacity, and the size or length.

Bridges are a vital part of people’s everyday life and without them people would not be able to do nearly as much as is possible today. The weather in the outer banks of North Carolina is very rough and can be very detrimental to the various structures on them. When hurricanes come near North Carolina the outer banks are hit the worst. Bridges on the outer banks keep being destroyed by weather and so the people there have to think about the cost, the effectiveness, and the need between a strong expensive bridge that will be able to handle rough weather or a cheap quick to build bridges that may fall with any extreme weather.

What are the old covered bridges of Madison County? Way back in Madison County, down back roads there lies an old piece of history, there lies the old covered bridges. An aroma of longstanding wood hangs in the air, the paint is blemishing, and the floorboards are groaning, but the timeworn bridges still stand. In the 19th century, many covered bridges were assembled. They were created to cover and shelter the roadway, and it was cheaper to replenish the boards of the roof and walls, then the compact beams of the bridge. Six covered bridges linger in Madison County, Iowa. These bridges received fame from Clint Eastwood’s movie, which utilized one of the bridges. These old covered bridges are an essential

Construction on the Kosciuszko Bridge was completed in 1939, prior to the construction of the Brooklyn Queens Expressway (BQE) and the Long Island Expressway (LIE). Over the past 75 years, NYSDOT has poured considerable resources into the maintenance of the bridge,

Two piers of St. George Island Bridge which are different in the characteristics of the structure, substructure, and in the classification of soil layers, are selected to simulate the barge-pier collision in LS-DYNA. Figure 2(a) shows the elevation view of the St. George Island Bridge in which the location of piers 1 and 3 in the south side of the navigation channel, water level, and the sea bed elevation are presented. Also, Figures 2(b) and (c) demonstrate the dimensions and the elevation of the impact zone, water level, sea bed (mud-line) level, and the soil layers related to piers 1 and 3, respectively. The water level in the location of the Pier-1 is 2.74m above the piles’ cap surface level and the sea bed level is at the same level of

Wald is a reporter for New York Times. He mentioned the reason for why the interstate 35W bridge would collapse into the Mississippi River was because there was a mistake in the bridge’s design. The reason was that there were few metal plates were too thin to be a junction of the bridge. So, these weak junctions caused the collapsed of the 35W bridge and let to 13 people killed during this accident. The Interstate 35W bridge had been existed for over 40 years after it was constructed in 1960s. After a long period of time, the bridge began to have weak points and require frequently repair for the bridge to make it safe. However, the changes made in the bridge made the bridge even weaker. After the bridge was collapsed into the Mississippi River, the National Transportation Safety Board held a conference to discuss the investigation about the cause of the bridge collapsed. Mostly, the investigators would

As it aged into the twenty-first century, Washington State Route 520’s Evergreen Point Floating Bridge began experiencing significant problems that indicated it was approaching the end of its useful lifespan. Government agencies big and small came together to bring forth a replacement bridge project to improve the safety and quality of transportation infrastructure to and from the City of Seattle for many years to come. Over a five-year span, construction was performed to create a floating pontoon bridge, similar in style to the original, but wider and better equipped to withstand the natural conditions of Lake Washington and the Puget Sound region.

The St. Mary's Bridge, found upstream and comparable in outline to the Silver Bridge, was closed down for review after the breakdown. President Lyndon B. Johnson requested an across the country test to decide the wellbeing of the country's Bridges. In 1967 there were 1,800 Bridges in the United States which were 40 years of age including 1,100 thruway Bridges intended for Model-T activity. Numerous government authorities expected that different structures, worked around the some point to handle Model-T activity, could confront the same destiny as the Silver Bridge.

On top of all this the proposed design would also need to be tested as it is not the same as the previous one which had been tested. A mathematical solution to be used for the designing of the bridge was not possible due to the fact that not much was known that has caused the collapse of the old bridge (Gimsing, 2011). While putting into consideration these conditions, the engineers opt to design the replacement and then add subject scale mockups to the design specifically constructed on a wind tunnel located in Washington