Key legal question
Whether the cantonal amendment creating controlled inert landfills for uncontaminated excavation material violates federal waste law.
Extracted holding
No. The canton may plan and authorize inert landfills limited to uncontaminated excavation material within the discretion left by federal law.
Extracted reasoning
Federal law requires valorization where possible, but also allows definitive disposal of non-valorized material in controlled landfills and permits cantons to restrict admissible waste by authorization. A planning-based limitation to a category of waste does not create a new landfill type.