No more swamp on #3, well at least the worst spots are no longer an issue.  There is such a low spot in that area of the fairway there is no way to get rid of 100% but we are happy with the results and there is no longer a swamp in middle of fairway.  We used a product called "E-Z Drain", it is a corrugated pipe with slits in it to allow water in the pipe, surrounded by shipping peanuts and enclosed with a geo-textile fabric.  This product removes the need for a pea gravel layer and only needs to be backfilled with sand and topsoil.