While we're on the subject of rivers, here is Skeldergate Bridge as you perhaps have never seen it.
Most York people know that the eastern section of the bridge was designed to be raised - but when was the last time that happened?
Our photo, which is dated March 14, 1955, shows the scene from the riverside at St George's Field as the bridge was raised to 'enable workmen to carry out maintenance work'. Sadly, there is no indication what kind of maintenance work was required.
Another photo, taken four years later in 1959, shows workmen on the top of the bridge: though again there is no information about what they are doing.
A third photo shows the scene on March 8, 1963. This time the caption is much more informative. "Skeldergate bridge was damaged today when this barge broke free in the fast moving flood waters and jammed underneath one of the spans," it says.
"Crowds watched as two other barges put on full steam and finally pulled the barge which was also damaged loose."
And finally, to round things off, we have a couple of photographs of St Helen's Square. There is no date on either. One, which appears to be earlier, shows the square covered in bricks or cobbles, with 'Mageans Irish Linen Warehouse' to the right of the picture (so on the south side of the square).
The second is more recent, possibly the 1960s or 70s judging by the cars. But can any readers put more specific dates on these photographs?