We found one dictionary that defines the word proof of beneficial use:

Tech (1 matching dictionary)

1. Lake and Water Word Glossary (No longer online)

▸ Words similar to proof of beneficial use ▸ Usage examples for proof of beneficial use ▸ Idioms related to proof of beneficial use ▸ Wikipedia articles (New!) ▸ Words that often appear near proof of beneficial use ▸ Rhymes of proof of beneficial use ▸ Invented words related to proof of beneficial use