I love bridges, so you're probably going to see a lot of bridge photos over time too. Think of it as a photo and history lesson today.
Every 20 years, the U. S. Army Corp of Engineers lowers the water level of the pool below Upper St. Anthony Falls to inspect a storm water tunnel. This leaves part of the Stone Arch Bridge naked. We went down there yesterday to photograph its nakedness. The only hitch was a windchill well below zero, which made it impossible to take more than a few photos before my fingers and my camera were frozen. Bah!
The Stone Arch Bridge was built in 1883 and was a working railroad bridge until 1978! You'll notice the arch on the left is reinforced with concrete. Wikipedia says "...in 1965, floodwaters undermined three of the piers and caused the bridge to sag. The bridge was repaired by strengthening the piers and reinforcing underneath two of the arches."
It was neglected during the 1980's, but was rehabilitated into a pedestrian bridge in the early 1990's. According to the nps.gov site, it "is the only bridge of its kind over the Mississippi River. It is made of native granite and limestone, and measures 2100-feet long by 28-feet wide. The bridge consists of 23 arches, and spans the river below St. Anthony Falls in Minneapolis, MN."
Techie Corner
Since this is an old bridge, I decided to give the image an old-time feel too. I converted to grayscale and did some split-toning to make it look sepia tone.
Shot at 1/90 Sec @ F32, ISO 200
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