1. (1) Supplemental environmental assessment.

   1. (a) The commission shall prepare a supplement to an EA if, after it has prepared an EA but before it has made a final decision on the proposed action, it identifies any of the following conditions:

      1. 1. Substantial changes to the proposed action, or significant new circumstances, that have the potential to affect the quality of the human environment in a significant manner or to a significant extent not already considered in the EA.
      2. 2. New information about the proposed action’s potential to affect the quality of the human environment in a significant manner or to a significant extent not already considered in the EA.
   2. (b) Section PSC 4.20 applies to the preparation of a supplemental EA under par. (a).
   3. (c) Paragraph (a) does not apply if, following preparation of the initial EA, the commission chooses to prepare an EIS.

2. (2) Supplemental environmental impact statement.

   1. (a) The commission shall prepare a supplement to a draft EIS if, after it has prepared a draft EIS but before it has made a final decision on the proposed action, it identifies any of the following conditions:

      1. 1. Substantial changes to the proposed action, or significant new circumstances, that would affect the quality of the human environment in a significant manner or to a significant extent not already considered in the draft EIS.
      2. 2. New information about whether the proposed action would affect the quality of the human environment in a significant manner or to a significant extent not already considered in the draft EIS.
   2. (b) Section PSC 4.30 applies to the preparation of the supplemental draft EIS under par. (a).
   3. (c) Following issuance of the supplemental draft EIS, the commission shall prepare a final EIS. If a condition specified in par. (a) 1. or 2. occurs after the commission has issued a final EIS but before it has made a final decision on the proposed action, the commission shall prepare both a supplemental draft EIS and a supplemental final EIS.

History

History: Cr. Register, June, 2000, No. 534, eff. 7-1-00.