The 7th bridge on our list is the Atchafalaya Basin Bridge all though I do not have much information about this bridge nor do I know how much steel was used on this bridge.
If anyone has information to add please comment so we can add information. This is what we do know as of this posting Atchafalaya Basin Bridge is the 7th longest bridge in the world and the 6th longest over water. The bridge is located in Louisiana, USA and carries interstate 10 over the Atchafalaya Basin the bridge has a total length of 96,095 feet or 18.2 miles long.
The Third bridge in this series, also the Third longest bridge in the world, and the second longest bridge over water. The briidge is located in Louisiana, USA, with a length of 23 Miles it comes in right behind Lake Pontchatrain Causeway at (22.80 mi) and Bang Na Expressway (33.51 mi). we do not have much info about this bridge and I don’t know how much steel was used in it’s construction but if we get this information I will post it here, feel free to comment if you have these numbers.
UPDATE: MANCHAC SWAMP BRIDGE is the second longest bridge in Louisiana but it is no longer the third longest bridge in the world as of today in Nov. 2019 it is now the 10th longest bridge in the world. the bridge is a little over one third of the highway's over lenght of 66miles. The piles used in this bridge were driven 250 feet beneath the swamp 76 meters and was opened in 1979. The bridge type is Trestle bridge and pile bridge.
This 120,374.02-foot concrete overpass only receives around 2,250 drivers a day. To this day this bridge is still an engineering feat that was built over alligator-infested waters that are rumored to be haunted, despite the legends it is a very safe bridge to drive over, but that doesn't stop superstitious tourist from visiting the bridge and lake every year.
also known as the Causeway is the worlds second longest bridge at 23.87 miles behind the Bang Na Expressway (33.51 mi) , the Causeway is the longest bridge in the world over water as of this posting.
The Lake Pontchatrain Causeway crosses over Lake Pontchartrain in southern Louisiana, USA. The bridge connects Metairie, Louisiana, a suburb of New Orleans and Mandeville, Louisiana.
Although I don’t have the numbers on the amount of steel used in the building of this bridge I do know there are over 9000 concrete pillings supporting the bridge.
The The Lake Pontchatrain Causeway first opened in 1956 and was at that time a a two-lane span of 1/100th of a mile. bridges was expanded on and re opened on May 10th, 1969. This bridge is a toll bridge and always has been.
More details on the Lake Pontchartrain Causeway, daily traffic is around 43,000 cars per day with a $5 USD toll southbound at the time of this update nov. 2019. The bridge is supported by 9,500 concrete pilings. In 2011 it was named the longest bridge over water by the Guinness World Records, after words it was divided in to 2 different categories continuous and aggregate. It is considered the longest continuous bridge over water. Jiaozhou Bay Bridge in China is the longest bridge over water aggregate.
After Hurricane Katrina Lake Pontchartrain Causeway lost 17 spans but structural foundations remained intact. Lake Pontchartrain Causeway is 1 of 7 highway spans in Louisiana
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