Idaho Code § 42-1714
The water resource board shall adopt and revise from time to time such rules as may be necessary for carrying out the provisions of sections 42-1710 through 42-1721, Idaho Code. The rules governing mine tailings and impoundment structures shall require the owner to provide an abandonment plan to assure that the site will be in a safe maintenance-free condition upon completion of the mining operation. The rules shall also require the owner to provide to the director a bond or other acceptable surety adequate to complete the abandonment plan if the owner abandons the site without conforming to the plan. The amount of the bond shall be determined by the director and shall be established to avoid duplication with sureties deposited with other governmental agencies. In lieu of any surety required hereunder, the owner may deposit cash and governmental securities with the director in an amount equal to that of the required surety on conditions as prescribed in the rules.
Idaho Code § 42-1714