Hi, Brian --
There is a lot of good information on this site about trout pond management -- and ponds with springs.
I have a small (less than 1/4 acre) spring-fed pond down in Virginia. I think Dave in el dorado has you pointed in the right direction. Maybe Cecil will weigh in, too -- he's quite an expert at raising trout in ponds.
If you do a search for trout threads to read, try putting "Cecil Baird1" in the member name field. Cecil routinely grows RBT, Browns, and Brookies to 10+ lbs in a tiny pond with well water running in 24/7 in the warm months to hold the water temp down.