Constantine President Peter Mercer at a April 17 public forum at the Aspen Hotel (Lex Treinen/Chilkat Valley News)

Unless the state grants an extension, the public has until April 24 to comment on a five-year plan of operations for work related to the Palmer Project, the copper and zinc claim upstream from  Haines and Klukwan. 

The plan would only apply to state lands on two areas — the so-called Plateau Site west of Glacier Creek…