So, do you remember playing in the rain and seeing how the water in the streets would get really high and sometimes even flow really fast? Well, sometimes when there's a lot of rain or melting snow, the water in rivers, creeks, or streams can also get really high and move very fast.
When this happens, the water might become too high for cars and people to safely cross over it. That's where a low water crossing comes in. It's kind of like a special bridge that's built low to the ground, so when the water is really high, it can still allow people and cars to pass over safely.
Low water crossings are made to be strong and sturdy. They're usually built out of concrete or metal and anchored really well into the ground. This way, even if the water is rushing by really fast, the crossing won't wash away or get damaged.
Sometimes, if there's a lot of rain or water, officials might close the crossing to keep people out of danger. It's always important to listen to these warnings and not try to cross the water yourself, especially if you're not a grown-up.
So, that's what a low water crossing is, a special bridge that helps people and cars safely cross over water when it's really high.