On a barge, the city water comes through pipes that need to span the water from the dock to the gunwales of the boat.
In Lyon, the barges were equipped with dolphin (poles metal stuck in the river on which boats are based), used for the arrival of water and electricity. All this under running water from the shore, to go back in Alva.
On top of it: the electric socket and tap water supply. The small problem
Greater Lyon did not think (despite the warning boaters during implementation work that is ...), metal (faucets) against metal (of the Dukes of Alba ) at 0 °, it freezes!
Especially if said valve was inadvertently placed high on the north side of the Duke of Alva!
The result, in this period of intense cold, is that we wake up in the morning without water! We have now moved
master the art of handling the hair dryer to thaw the famous tap, or leave overnight, allowing a little water to prevent it from freezing in the pipes ... not very green!
When the isolation valve, it is mission impossible because of where it is placed.
But he'll do less and less cold in the future, it will not be a problem in 2050!
Meanwhile, residents of the river do the best they can!