Judy, it seems to be too ...

Judy, it seems to be too little information. What is the use for the water; domestic or agricultural or industrial. My take on the "few words" is that it is either for; (i)  domestic (1 or several households), or (ii) agricultural - small vegetable garden, or small farm.

In either situation there are two initial details required; (i) water quality of the water in the stream, and (ii) before harvesting from the stream you need to know what are the downstream requirements of other users plus environmental flows required downstream.

You will, in my opinion, and I do not know where you are located, a permit or license to take water from the stream - all dependent on the local government bylaws and state bylaws on water harvesting or pumping or abstracting water from a watercourse.