Structures over pile

I’m going to be doing some volume measurement of a coal pile soon. How does DD deal with structures that are over top of the coal pile? Will it mess with the volume measurement?

Structures on top of the pile will have an affect of the volume measurement because there is currently no way to exclude it from the measurement.

So what is the work around for this?

I would think you could export the data and manually remove what you don’t want in some software, then use another piece of software to get the volume measurement?

This exact situation has arisen for me today! Do you have any experience of software available to do this process? It would be useful to be able to remove the gantry (this particular one is static). I attach a photo of the situation where this has occurred, any contributions would be most welcome.