`` after we 've roofed the stoa , i want to talk to you about the drainage system ; if you do n't get something done this summer , we 're going to have problems when the rain starts the whole agora is a shallow basin , the water will pool in the middle of it , we should really have done something before we paved it , but it 's not too late to do something now , i 'll have to dig up a channel through the pavement and then cover it over again , as long as we lead the water off we should be able to control it .