seems like a fine (not extremely complicated) excercise - really a good stuff for learning and development on the fly.
1. make a list of your work relevant areas of focus and responsibilities - WRITE this down
2. make a list of major success crieteria for EACH of these areas.
These can be:
a) classic operative and financial KPIs (keep treated water quality within limits, safety indicators, LTI, budget, machines´ on-stream factor, etc) etc = maintaining specific standards, abilities
b) accompanying/secondary targets (like the birdwatch stuff

) - like send report weekly, number of observations, "no major incidents observed"
c) change initiatives (projects) - these are besides your operative core work - what is the status of these?
- if ongoing, there are probably some planes/milestones to check regularly (you might have separate project review meetings, or you cover them on your regular weekly meeting
- if to-be-started, I suggest that you use the Natural Planning Model (see book) to create the initial team alignement
d) development goals of your people (youngsters, seniors and your own)
Make notes how, when and whom you need to report about these
3. Set up your workflow to manage above
team meetings (partly in place, add F2F meetings)
your own review and reporting time
think hard what can be delegated to the more senior people (development/mentoring is a good target, but also work (re)scheduling can be)