That is good news.
I bet you could build a little dam with clay in your small creek. Build it higher on the slope in a sunny spot so you can grow grass on the dam face. Give it LOTS of freeboard and run a 6" pipe around your current pond.
If you have a little rock available, maybe make an emergency spillway around your new creek dam. That way, when you get a 6" rain you will get a little silt in your main pond and not have your creek dam get overtopped and blown out.
