Elevating the watering station helps keep the water clean and free from dirt and debris that the chickens might otherwise scratch up into it. Also surrounding with rocks cuts down on the dust in the water.
How to Make a Chicken Waterer Here's an easy and super cheap way to make a chicken waterer. You can possibly make it for free, using all recycled materials. (I made mine for $1.00 because I found a cake pan at a dollar store.)
This would work for feeder too, sized to hold inverted 5 gal water jug. Base is lifted to keep them from getting dirt in it. Outside in coop run area. Feeder / waterer on top of sturdy plywood & galvanized awning so can be accessed without entering run