It took 200 engineers and workers to complete the job. Additionally, the increased diameter of the pile walls to 5 inches allowed for more cover over the steel reinforcement bars. The on-site location of these facilities allowed for quick construction of the bridges. His bid for office in 1924 was in vein, and the eastern crossing, named the Watson Williams Bridge (U.S. 11) eventually was built. People loyal to the causeway, however, were quick to point out that the criteria of measurement used by Guinness included aggregate structures, which would include land bridges at the ends of the main bridge and an undersea tunnel. The second bridge was opened in 1969, separated from the original by about 84 feet.The second span was only about 50 feet longer than the original, but it was enough to finally catch the attention of the Guinness Book of World Records (first published in 1955).
These were placed in case of structural impairment due to boating collisions. Before the project ever broke ground, several plots of land were actually sold.The original design featured two separate drawbridges, each eight miles from shore. In 1955, the Louisiana Bridge Company was created to undertake the construction project. New construction technology with pre-stressed concrete and increased demand led to the mid 1950's idea for what would become the Lake Pontchartrain Causeway. Tolls are collected on the north shore for southbound traffic only. Holes bored within the concrete housed pre-stressed, high strength steel wire. Plans were made to expand the causeway by building a second two-lane span parallel to the original. A revolutionary construction method allowed for the spinning of the new concrete supports at higher speeds. This concept involved the construction of a two-lane concrete bridge to the east. A radar system was also implemented to alert officials when a boat entered a one mile buffer around the spans.
The World's Longest Bridge Over A Body Of Water. Then gubernatorial candidate Huey P. Long was in staunch opposition to this bridge proposal, as it was to include a $1.25 toll per car. Babies have been born on the causeway when their mothers failed to make it to the hospital on the other side. One of his first desires was to see a free bridge across the Pontchartrain, following the completion of the toll free Rigolets Bridge (U.S. 90) between Lakes Pontchartrain and Borgne to the east.Additions to the Causeway vicinity include the placement of "spare parts" at various locations along side the bridges. The prefabricated bridge pieces created at the job site were easily transported by barge for assembly over water. The northbound span is actually slightly longer than the companion southbound span.
That meant that instead of having a maximum width of 24 inches for a support, engineers could now create 54 inch diameter piles. Success of the project to build the first pre-stressed bridge, the 1949 Walnut Street Bridge in Philadelphia, Pennsylvania, proved that the technique could work for much larger projects such as the Lake Pontchartrain Causeway.As the 1718-founded city of New Orleans grew during the early 20th century, accessibility becamean increasing problem. Work also coincided at the time on the old bridge as well, with the installation of the draw bridge bascules, widening of the navigational channel to 125 feet, and the replacement of southern drawbridge with a ship channel. The south end of the causeway transitions into a heavily traveled commercial arterial (Causeway Boulevard) to Interstate 10 in Metairie. Assembling the piles involved stacking each pile on top of one another until the desired height of 88 feet was reached. This volume fueled mid 1960'ss preparations for a second lake crossing.With the 1920's proposal to create islands for a causeway north-south abandoned and the succeeding new crossings to the east, new schemes arose for a crossing over the middle of the lake. The Lake Pontchartrain Causeway was officially recognized as the longest bridge over water in the world, a record it held—unchallenged—until 2011. Work on span paralleling the 1956 bridge began during September of 1967. Our Mission Is To Make All Our Commuters' Trips Across The Causeway Safe And Timely.
Of these, one of the more popular at the time involved a north-south causeway across the middle of the lake. A decade after the completion of the first bridge, daily traffic had surpassed 5,300 vehicles. It is more a tidal lagoon than a lake, since it connects A bascule drawbridge is located at the 16.0-mile marker on the causeway, allowing water traffic to pass under the bridge.
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