Barbara Vlamis, director of Chico-based AquAlliance.net, was dancing on the grave of the Delta Plan Thursday.

Her group was a among a coalition that challenged the environmental review of the plan, which includes plans for the hotly-contested twin tunnels. However, a judge’s decision in May, and a clarification this week, invalidated the plan because it did not meet the laws passed by the state legislature in 2009. Because the plan was invalidated, the questions about compliance with environmental review laws don’t apply, Judge Michael Kenny stated in a six-page document released Thursday.