The measurement of the water level (stage) from an observation of a high water mark of a flood event in a stream. The description and location of the high water mark. The gage height of the measured high water mark. The accuracy of the measurement of the high water mark, as assigned by the Hydro-tech. The method of determination of the high-water mark stage accuracy. The estimated date/time that the high water mark occured. This can be a partial date. Comments about the high-water mark observation.