[jeffk]

Another interesting factoid is that average rainfall in NH for July and August is 3 to 4 inches per month. The dam minimal output at 250 CFS lets about 4 inches a month flow out. So, the normal dam output for July/August would balance average rainfall. Obviously with runoff and other factors it's much more complex than this but it gives you an idea of a reasonably balanced system.

Add in evaporation effects and other lake outflows and you would see a gradual drop in lake level over the summer, which, on average, is what we normally experience.

This has NOT been an average summer.