The metal structure of Tower Bridge over the Thames, taken by Sidney Alfred Beer in 1892 before the stone cladding.
From The National Archives UK
Zeppelin floating hangar on Lake Constance, 1908.
Because airships are inherently sensitive to sidewinds at launch, hangars were often build so they could be rotated in line with the wind. One approach to this was to float them.
From 1940 to 1986, an Aerial Car Ferry operated between the communities of North Bend and Boston Bar located on opposite sides of the Fraser River in the British Columbia Fraser Canyon region. It replaced the rowboat crossing on the Fraser River that transported mail as well as passengers.
A gondola car capable of holding a single motor vehicle or 40 passengers was carried on two steel cables across the river. In its years of operation the North Bend Aerial Ferry carried 2,037,579 vehicles, 6,092,434 people and made 1,610,789 round trips.
The bellmouth Spillway of the Silent Valley reservoir, Northern Ireland.
The reservoir was built between 1923 and 1933 to provide drinking water for Belfast.
The “rolling bridge” in Saint Malo, France, was operating between 1873 and 1923, to avoid the long walk all the way around the harbour.
A similar structure was also built in Brighton, England
“To conduct pressure tests in a safer manner, a water tank was constructed to encase the fuselage. It was submerged and filled with water, and then additional water was pumped into the cabin until the pressure inside the fuselage reached 1P, the equivalent of flight. This was then cycled to simulate many flights over the life of an aircraft.
By using water instead of air, water being a much less compressible fluid, the test would be much safer and the fuselage would be able to be repaired and re-tested as necessary. Had air been used, the results would have resembled the catastrophic in-flight break-ups at Elba and Naples.”
- Federal Aviation Administration
From the Retronaut
Like all coasts, the land around the Mississippi River is constantly evolving. In past centuries, that process was slowed by the annual flooding of the River’s vast delta, which brought new sediment to replace what was lost.
But climate change, coupled with heavy engineering (channeling and stronger levees), have turned this coastline into one of the most rapidly eroding areas of the U.S.
The decades old map are currently being updated and more than 30 of the region’s names have already been officially retired from the map.
“Because deltas are so dynamic, they’re either building or they’re eroding. The idea that you can pick a point in time and say, ‘This is how we want the coast to look,’ is, first of all, the wrong way to think about it. And second of all, it creates an impossible situation.”
Read more in the Atlantic Cities article.
18 temporary pontoon bridges were built for the 2013 Maha Kumbh Mela, one of the largest religious gathering on earth (with an estimated 100 million piligrims in 2013), held that year on the banks of the Sangam in Allahabad at the confluence of the rivers Ganga, Yamuna and Saraswati.
Photographs by Wolfgang Weinhardt.
The water intakes for the Chain of Rocks Water Treatment Facility on the Mississippi River, built in 1894 and 1915.
Wind tunnel test on a model aircraft using fluorescent oil to highlight the flow patterns.
Image Credit: NASA Langley/Preston Martin