I posted this on irrigation and got no response so let me ask you guys. First let me say I'm a lawn care and landscaper. I don't do anything with water but have a problem. I have been asked to mulch a playground with a history. The church where it is located has the playground next to the building. They had problem with flooding in basement and had a drain installed about 50 ft. from the building and the ground is sloped according. They want the drain covered with mulch and suggested ground cloth over drain to allow water to pass through. They want the drain covered with 12 inches of mulch so it is no hazard to children. Will this work and if not what will. They have at present a heavy duty grate over the drain about 3 ft wide. The drain was installed by a plumber 6 months ago. Any ideas?