A remote control boat equipped with a SonTek M9 Acoustic Doppler Profiler (ADP) has been employed with HydroSurveyor software to create a three-dimensional map of a damaged (and still submerged) flood barrier, following serious damage that took place during last December’s storms. Data from the survey enabled the Environment Agency to act swiftly and effectively to repair the damage and thereby protect local industry and residents. Extreme weather conditions and the highest tide for 150 years resulted in serious damage to a flood bank at Seal Sands near Billingham in the North East of England.