Jim, thanks for the info. The lake is sitting on a large vein of gravel-thus ground water moves thru the lake all the time with natural streams actively feeding it as well. The water is very clear and blue but somewhat shallow. I am working with ducks unlimited as the pit near completion to rehab the 1000' of west shoreline properly to invite waterfowl to the lake by dealing with the shoreline configuration, the slope gradients and the variable depths for wildlife and biological diversity. My thoughts were similar with the sq ft of island space..... I have approx. 1/2 acre total island space so maybe 50-75 domestic ducks and geese will be enough along with the native waterfowl. I don't want to feed and house to many during the 2-3 months of winter. I will be building a approx 10' X 5' X 5' height duck house on the island near the windmill aerator with good southern exposure for winter warmth thru the large window I will build. Do you know of any good web site to get ideas for a duck house? Thanks
Rowly