Planning before doing is one of the most important parts.
You can design your own using some backyard stream designs. Another choice is to have a contractor design the stream for or with you. It’s a good idea because not every design can work for every backyard. Yards can be uneven, making designing hard.
You’ll want to keep in mind that there needs to be a slope for the water to go down. It’s best if the area is easily seen from windows, decks, or other areas of the house.
The top and bottom of the stream need basins for the water to collect. You can fill the bottom basin with gravel instead of water. This makes it safer, easier to maintain, and creates a different look.
You can make waterfalls by digging a “stair-step” into the stream bed.
Once you have the location and plan you can mark out the boundary with spray paint. Then, dig down about 6-8 inches and around 2-4 feet wide in the spray-painted areas. Now you have a stream bed!