Another thing to look into is the silt issue. It might be better to build a small little pond where the drain water collects and then flows into the main pond.
Good point. The water in the catch basin is usually pretty clear (except during some recent road construction at the top of the hill). There is another corrugated pipe down stream a couple hundred feet. Maybe I should put my gate down there, which would create a small temporary pond during heavy rains, and would give the silt some time to settle out a little.
