[Craig T]

Originally Posted by Evans, Marv

When I worked at a camp in the mountains a long time ago. We had a spring we used for a water source. The collection pond (maybe 30 - 40 ft. diam.) was downhill from the spring and fed a 5K gallon tank downhill from that. If the spring flow isn't very forceful, would making the collection pond directly over it suppress the flow from pressure of the water column? Would disturbing the spring outlet affect the flow? Provisions for overflow from large storms? Since it's at the "bottom of the property", you might need to answer some questions before starting.

This is sound advice^^^

A friend bought some property outside Bend, OR, with a small year-round spring. He built a similar dam just 30 or 40 feet down the run-off line. When the pond level covered the spring with a couple feet of water it stopped flowing. The water became stagnant. He was expecting a beautiful clear pond with bluegill and crawfish. All he got was tadpoles and mosquito.

I'll call him and see if he solved the problem and report back.