So, this project does sound feasible. Considering the airmax aerator uses 1/2 - 3/4 hp motor. Now I'm sure it's a different type of compressor, but still even at 50% of the hp and torque numbers you gave, it sounds like I should be able to make enough power. Unless I'm comparing apples to oranges.
BTW, the compressor I'm considering is the Outdoor Water Solutions, BalCam II. Upto 4.5CFM @30 PSI. I can't find anywhere a spec sheet claiming how much air at a certain rpm.
FishinRod,
Even after hard rains, it doesn't pour full bore. When they installed the pipe, someone put some sort of mesh fabric over the pipe on the pond side, which is kinda cool, acts as a time release. Obviously it dumps more after after a rain but not super crazy. Actually throughout the year the water level fluctuates about 1.5'.
I attached a screenshot of the pond.
The inlet creek is at the bottom left corner. The drainpipe is about the middle of the top. The deep hole is in the top left corner
