A. In addition to the other requirements in this chapter, if a project will alter or relocate boundaries of the SFHA, then the applicant shall also submit a request for a conditional letter of map revision (CLOMR), where required by FEMA, with engineering documentation and analysis regarding the proposed change. The project will not be approved unless FEMA issues the CLOMR (which requires Endangered Species Act consultation) and the provisions of the letter are made part of the permit requirements. If the change to the BFE or boundaries of the SFHA would normally require a letter of map change, then the project proponent shall initiate, and receive approval of, a conditional letter of map revision (CLOMR) prior to approval of the development permit. The project shall be constructed in a manner consistent with the approved CLOMR.

B. If a CLOMR application is made, then the project proponent shall also supply the full CLOMR documentation package to the floodplain administrator to be attached to the floodplain development permit, including all required property owner notifications.

C. The floodplain administrator or designee shall notify adjacent communities and the Washington Department of Ecology prior to any alteration or relocation of a watercourse, and submit evidence of such notification to the Federal Insurance Administrator.

D. Assure that the flood-carrying capacity of the altered or relocated portion of the watercourse is maintained. If the maintenance program does not call for cutting of native vegetation, the system shall be oversized at the time of construction to compensate for said vegetation growth or any other natural factor that may need future maintenance. (Ord. 6761 § 1 (Exh. A), 2020.)