Note for those interested. These are known as hydrokinetic turbines. These would be useful if you don’t have any drop in elevation below the creek. If you have steep terrain with water flowing uphill, you can get a lot more power from the pressure caused by a height difference. This is usually called microhydro, if you want to do more research.

https://attra.ncat.org/publication/micro-hydro-power-a-beginners-guide-to-design-and-installation/