I recently had driveway work done which included installing a 10" corrugated plastic culvert under it. Since the phone line was in the path the dozer operator said they normally just cut it and then call in for repair. I asked him to avoid cutting it if at all possible because we did not want the "inconvenience" of waiting 5 days for a repair. He complied and now we have a culvert that allows about 1/4" of water to stand in part of it. My bad! What solutions do I have for this? I have thought of pouring a floor leveling compound or hydraulic cement in it to fill in the low spot. We can sacrifice some of the cross-sectional area because 10" is more than we need. It is 20 feet long.