The trailmaster keeps a signin sheet for each of the major runs and prepares a written summary/report of the activities preformed.  The report is generally 2-3 pages of written summary and a few pages of pictures.  For smaller runs, for example where 2 rigs do a patrol of the trail, the recreation officer is notified and the people doing the run must stop by his office to sign a release.  A simple email summary satisfies their records for smaller runs.  The trip summaries/reports are used by the recreation officer to justify the volunteer hours reported and are generally read by a few different people in the local forest. The best/most interesting are passed up the chain of command as examples.

If you used a chainsaw then someone has to be certified for them to claim the hours.  Otherwise I will reach out and find who to contact.