|Total length||1.408 meter|
|Main overvoltage||230 meter|
|Bridge deck height||? meter|
|Traffic intensity||26,000 mvt/day|
According to Beautyphoon, the Clark Bridge is a cable- stayed bridge in the United States, located on the border of the states of Missouri and Illinois. The bridge spans the Mississippi River at Alton.
The Clark Bridge is a 1,408 meter long bridge with a main span of 230 meters. The main bridge has a layout of 92.1 + 230.4 + 92.1 meters. The bridge has two I-shaped pylons that tower 86.3 meters above the bridge deck. Each pylon has cables in 4 directions, from the pylon on the inside to the outside of the bridge deck. It is one of the few older cable-stayed bridges in the United States to have this. The bridge deck is 32.9 meters wide and 1.5 meters high. Crossing the bridge is US 67 with 2×2 lanes and emergency lanes, connecting St. Louis to Alton. The bridge is the northernmost connection across the Mississippi River near St. Louis.
The first bridge at this location was the Old Clark Bridge, a half- timbered bridge that was commissioned in 1928. It had a carriageway only 6 meters wide and was unsuitable for the increased traffic between St. Louis and Alton. This bridge was renovated in 1959 and 1975, and finally closed in 1994 when the new bridge was completed.
The new bridge is an older generation of cable-stayed bridges and the first in the United States to have two I-shaped pylons. Older cable-stayed bridges in the United States typically used A- and H-shaped pylons. The bridge was built in the early 1990s, with work being delayed by the major floods of 1993. The peninsula between the Missouri and Mississippi Rivers to which the bridge opens was largely submerged at the time. Despite this, the bridge could be opened in January 1994. Construction cost $85 million.
26,000 vehicles cross the bridge every day.
|Total length||1,964 meters|
|Main span||158 meters|
|Bridge deck height||27 meters|
|Traffic intensity||? mvt/day|
The Eads Bridge is a double-deck arch bridge in the United States, located on the border of the states of Missouri and Illinois. The bridge spans the Mississippi River in St. Louis. It is the oldest bridge over the river still in use.
The Eads Bridge is a steel arch bridge with an elevated deck. The bridge is a total of 1,964 meters long, with three steel arch spans of 158 meters. The bridges are arch bridges of brick. The bridge deck is 27 meters above the Mississippi River and is 14 meters wide. There are 4 lanes across the bridge, connecting to Washington Avenue in St. Louis and Broadway in East St. Louis. The bridge is double-decked, traffic drives on the top deck, below is a deck for 2 tracks of MetroLink. The lower deck is poorly visible due to the dense steel construction of the arch and the brick bridges. The bridge is toll-free.
The bridge was the first over the Mississippi River near St. Louis. The bridge was built between 1867 and 1874 by the Illinois and St. Louis Bridge Company. It was the first bridge to use the cantilever method (free extension) for the auxiliary pylons for the arch spans. This was because no auxiliary structures (falsework) were possible in the river so as not to impede shipping. The caissons used to build the bridge piers in the river were the deepest yet, and decompression sickness became a problem, with 15 workers killed during the bridge’s construction.
The bridge opened to traffic on July 4, 1874. When opened, it was the longest arch bridge in the world, and the first arch bridge to use steel as the primary material. The bridge became an iconic image for the city of St. Louis. The bridge is named after the engineer who designed it, James Buchanan Eads (1820-1887).
Fort Madison Bridge
|Fort Madison Bridge|
|Total length||1,091 meters|
|Main span||82 meters|
|Bridge deck height||? meter|
|Traffic intensity||2,700 mvt/day|
The Fort Madison Bridge is a double -deck swing bridge in the United States, located on the border of the states of Iowa and Illinois. The bridge spans the Mississippi River at Fort Madison.
The Fort Madison Bridge is a special bridge, namely a combined double-deck rail/road bridge that is also a swing bridge, probably the longest of this type in the world. It is the southernmost movable bridge over the Mississippi River. Not the entire bridge is double-deck, about 540 meters is double-deck, this is largely a truss bridge. On the Iowa side is the swing bridge with a span of 160 meters (divided into 2 x 80 meters). The other spans are 82 meters long. The total bridge is 1,091 meters long. The bridge is two-lane, with Iowa State Route 2 and Illinois State Route 9 running over it. On the Iowa side is the town of Fort Madison, on the Illinois side is the village of Niota. The bridge is a toll road. Freight traffic is not allowed on the bridge.
In 1887 the first bridge opened at this location, a railway bridge that also passed motorized traffic. On July 26, 1927, the current bridge opened to traffic. It is one of the oldest bridges still in use over this part of the Mississippi River and has not yet been replaced due to low traffic.
Approximately 2,700 vehicles cross the bridge every day.
The bridge is a toll road, privately operated by BNSF, one of the largest railroad companies in the United States. The toll is only levied towards Illinois and the toll receipts are used for the maintenance of the traffic deck. The toll booth is located in the middle of the turning area.