(a) For a proposed floodplain action, DOE shall allow 15 days for public comment following issuance of a notice of proposed floodplain action. After the close of the public comment period and before issuing a floodplain statement of findings, DOE shall reevaluate the practicability of alternatives to the proposed floodplain action and the mitigating measures, taking into account all substantive comments received. After issuing a floodplain statement of findings, DOE shall endeavor to allow at least 15 days of public review before implementing a proposed floodplain action. If a Federal Register notice is required, the 15-day period begins on the date of publication in the Federal Register.

(b) For a proposed wetland action, DOE shall allow 15 days for public comment following issuance of a notice of proposed wetland action. After the close of the public comment period, DOE shall reevaluate the practicability of alternatives to the proposed wetland action and the mitigating measures, taking into account all substantive comments received, before implementing a proposed wetland action. If a Federal Register notice is required, the 15-day period begins on the date of publication in the Federal Register.