I suspect that the gates are closed--the water is below the action stage. If the power company lease on Petenwell is the same as on Castle Rock lake, then they have to manage the lake to within a one foot variation during the summer. The Action Stage on Petenwell is 924', that is where they need to take action by increasing the water flow thru the dam by opening gates. Here is a link to real time water levels at Petenwell. Castle Rock has the same, just hit the Downstream Gage button to see it.

http://www.crh.noaa.gov/ahps2/hydrog...,1,1,1,1,1,1,1