We have a pond (about a quarter of an acre) that gets fed from numerous small streams and subterraneous sources, and the water feed is decent from autumn to spring especially when we get lots of rain. At the bottom of the pond, there is an overflow that has been concreted and this allow excess water to spill over into another stream that takes the water down the valley. This overflow gushes from autumn to spring.   Based on this, I was wondering whether hydroelectric would be an option