Pond Boss Forums POND CONSTRUCTION Renovating a Pond or Lake? Measuring muck depth?

Is there a preferred method for measuring muck depth? With my pond frozen, I was going to drill a few holes (ice fishing auger) in different locations to begin mapping some things out.

I have a portable depth finder so my plan was to drop the sensor in the hole to get water depth to the bottom. Then I would take some type of pole and jam it as deep as it will go. The difference in the 2 measurements should be how much muck I'm dealing with. Is this a sound approach or is there a better method?

Thanks!