Questione giuridica chiave
Whether the administrative law appeal was admissible against the cantonal judgment and cost order.
Decisione estratta
The appeal was admissible insofar as it challenged the substitute-enforcement cost order, but not as to definitively settled underlying licensing issues.
Motivazione estratta
The cost order was based on directly applicable federal water-protection law through cantonal provisions, whereas earlier final decisions could not be reopened.