ID H0239

Revises legislative findings to emphasize that domestic phosphate fertilizer supply is critical to national food security and Idaho's agricultural economy, and authorizes the Board of Environmental Quality to develop rules for phosphogypsum stack design and construction.

Establishes that the law does not supersede federal mineral processing waste exemptions or existing EPA/DEQ agreements, and exempts phosphogypsum stacks from water law requirements under sections 42-1710 through 42-1721.

Defines new terms including "auxiliary holding pond," "intermediate liner," "lateral expansion," "phosphogypsum stack," and "phosphogypsum stack system" for purposes of the regulatory framework.

Repeals Section 39-176D regarding board powers and establishes minimum design and construction requirements for new phosphogypsum stacks and lateral expansions, including run-on/runoff controls, factor of safety of 1.5, composite liners with specifications for synthetic and nonsynthetic components, leachate control systems, and perimeter dikes with specific safety factors.

Requires operators to submit design and construction plans certified by registered professional engineers to the Department of Environmental Quality; establishes a 90-day review period and sets fees of $15,000 for new stack systems, $10,000 for expansions, $5,000 for intermediate liners, and $2,500 for stack components.