I've moved into a new house and the soil at the back is pooling water and not draining away. The house was built on an old sand pit and contains a lot of clay too. A gravel/pipe drain was put in 2-3 wk ago and started to help but lot of rain last few days and is pooling again in one area. The footprints in the mud stay there and when it dries it cracks like the desert!

Can I rotavate this and lawn it without it killing the lawn off, the site manager reckons the lawn will dry it out.