We just had a driveway built behind our garage and the concrete company dumped all of the excavated dirt onto our St. Augustine lawn during the process. It only sat on the lawn for a few hours before they removed it, but the grass where it sat now has a layer of compacted dirt in it. The blades are visible, but i'd estimate there is about an inch of compacted dirt. Can I just flood that portion of the yard to remove it? Is there a better way? Fortunately my yard slopes downhill there, so it helps the runoff, but I don't want to damage the grass. To make the situation a bit worse, we laid about 3 pallets of new sod in the same sprinkler zone which results in that existing grass being a mud hole. Thanks in advance.