Admin Order 58-16-01 - Laserfiche WebLink

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Development in the Floodway For work within the floodway a No -Rise Certification and the accompanying analysis must be provided. In order to be approved it must be demonstrated that there will be no (ZERO) increase in water levels at any point during the occurrence of the Base Flood. Even minor increases in water levels upstream or downstream are disallowed. See FEMA's memo Procedures for "No -Rise" Certification For Proposed Developments in the Regulatory Floodway for the necessary guidance. Please note that these procedures require that the original model's HEC -2 data be obtained, the data transferred into the current HEC -RAS version that is approved by FEMA, and many additional time consuming steps. The report, signed certification, HEC -RAS printout and a complete electronic copy of the models must be submitted for review. Watercourse Alteration Requirements CFR Title 44 Part 60.3[b][6] Notify, in riverine situations, adjacent communities and the State Coordinating Office prior to any alteration or relocation of a watercourse, and submit copies of such notifications to the Administrator (FEMA); CFR Title 44 Part 60.3(b)(7) Assure that the flood carrying capacity within the altered or relocated portion of any watercourse is maintained. Eugene Code 9.6707(2) also indicates'In connection therewith, the duties of the building official or designee shall include, but not limited to: (g) Notifying adjacent communities and the Division of State Lands (actually DLCD) prior to any alteration or relocation of a watercourse, and submitting evidence of such notification to the Federal Insurance Administration (now Federal Insurance and Mitigation Agency) (h) Requiring that maintenance is provided within the altered or relocated portion of a watercourse so that the flood carrying capacity is not diminished;' Below is a lengthy excerpt from A Summary of NFIP Policy for Local Officials provided by FEMA Region X. It is intended as guidance to local officials and does not reference local code requirements which maybe more restrictive. Notification. If a development permit application proposes a stream alteration, the local official must notify adjacent communities, the State Coordinating Agency for the NFIP, and provide a copy to the FEMA Regional Office. This provision recognizes that flooding problems do not respect legal boundaries and is intended to make communities aware of proposed stream changes that might create new flood problems or aggravate an existing one in surrounding areas. If an adverse impact is suspected, the neighboring community will be able to voice its concerns prior to any modification. Federal and State permits will usually be required for any alteration or relocation. It is recommended that the community require the submittal and approval of a Conditional LOMR for large-scale proposals (this is approval of the proposal before it is to be built — assures that FEMA will recognize it for a map 2016 PIDS Manual, Appendix, B-3 B-3-1