Building a water feature pond
Is a permit required to build a pond in Oregon, Deschutes County?
Deschutes County Oregon
That may depend on several factors. I am not able to respond to the specific nature of this question. You may want to go to the county planning department if you live in the county or to the city planner for a response. They should know the specifics of this. If you are planning to use irrigation water for this pond then you may need to go to the water master office to check on water rights.