The Fairfax District exit ramp (Exit #423) coming off of westbound I-70 has its own deck truss that is independent of the main westbound truss (this is the new 1962 span). Thus, there are effectively three distinct deck truss bridges on this viaduct.
With a construction date of 1907, this bridge would have to be one of oldest bridges on the US Interstate System, if not the oldest.
How high is the bridge above the Kansas River?
The lower level of this bridge is not open to auto traffic.
Only bicycles and pedestrians, the lower level was closed somtime in the 80's, restored, and reopened as a pedestrian crossing.
Also, when this bridge was built, it did not have the lower level, the lower level was not added until 1930, and it was only big enough for one lane car traffic.
The reason they closed the lower level to car traffic?
Simple, todays cars are too heavy, cars back in the 30's, 40's, 50's, were not that heavy, however, todys cars and trucks are too heavy for the little one lane truss.
Hard to believe this bridge is celebrating its centennial this year! Most locals would not know that the Lewis and Clark is that old. The Minnesota collapse is bringing about a new inspection of this span.