Following is a chart from some historical data for Hoover, measured in feet above sea level.   The "Average" is compiled from data going back to 1956.  Normal pool elevation is 894.00'....this is the height of the crest gates...any water above that elevation goes over the top of the gates, water below that elevation stays impounded.

For "real time" data and chart of Hoover go to USGS site at: http://waterdata.usgs.gov/oh/nwis/current/?type=lake&group_key=county_cd

The chart below represents end-of-month readings.