I see from all the posted answers that no one has ever talked to a city water crew. I thank you may be amazed at what most of the oldtimers will tell you. Sure the crews will have electronic detectors, but I'll bet if you look in their truck you will find two lengths of wire about 2 to 3 feet...
Questions you should be asking...Is there any historical data showing flood elevations in the concerned area? Talk with some of the oldtimers who have lived there a long time. I would like to remind everyone that HEC RAS is not for small watersheds,and at best, all our engineering solutions and...