Pond Boss Forums INTRO Questions & Observations How can I filter silt/sand from storm drain?

Well that certainly creates new issues, Tim, but how about looking a little farther back and finding a place you can interrupt the storm drain elsewhere, create your settlement ponds in that location, and then allow the outflow of the settlement pond to be back into the storm drain so it can exit normally?

Otherwise, your idea of looking into doing something different around the outflow is probably the next best bet. Again, perhaps if your conditions permit, look at maybe creating a berm around an area by the current outflow and consider planting it with various plants to help slow water flow and absorb the nutrients and silt before it spills into the main body of the pond. Perhaps that's what you were suggesting.