Details for FINAL NOTICE AND PUBLIC EXPLANATION OF A PROPOSED ACTIVITY IN A 100-YEAR FLOODPLAIN AND WETLAND DECEMBER 6

FINAL NOTICE AND PUBLIC EXPLANATION OF A PROPOSED ACTIVITY IN A 100-YEAR FLOODPLAIN AND WETLAND DECEMBER 6, 2018 To: All interested Agencies, Groups, and Individuals This is to give notice that the City of Reedsport has conducted an evaluation as required by Executive Orders 11988 and 11990, in accordance with 24 Code of Federal Regulations 55.20, Subpart C -Procedures for Making Determinations on Floodplain Management and Protection of Wetlands. The Reedsport Flood Reduction Repair project is located in Reedsport, Oregon, in Douglas County. The project includes various measures to protect the City from flooding, including increasing the height of the levee, constructing floodwalls, and improving drainage and pumping infrastructure. This project, if implemented, would be funded by the Federal Emergency Management Agency (FEMA). Portions of the proposed project are located in the 100-year floodplain and intersect several wetlands. The proposed project would impact FEMA-designated Zone A (100-year flood); Map Numbers 41019C0353F and 410149C0354F and several National Wetland Inventory-mapped wetlands classified as Freshwater Forested/Shrub Wetlands or Freshwater Emergent Wetlands that act as erosion control and provide habitat for flora and fauna. The potential impacts will be both temporary and permanent, affecting less than 1 acre of floodplain and 0.5 acre of wetland (approximate). Temporary impacts would be associated with excavating portions of the existing levee. Permanent impacts would be associated with adding more earthen fill and constructing floodwalls to increase levee height, improving gravity drains by excavating and rebuilding with quarry spall, as well as replacing or repairing the conveyance piping that runs through the levee. The site (including staging areas) is approximately 36,215 square feet (SF) (31,949 SF of levee, staging, and pump stations; 4,377 SF of Soil Borrow Area 1; and 4,266 SF of Soil Borrow Area 2). The primary purpose of this project is to reduce future flooding events by making improvements to the City's existing flood reduction system. The levee surrounds the eastern portion of the City and acts as a barrier between the 100-year floodplain and the City. Pump stations and conveyance piping occur in various places around the City, with portions of the system intersecting floodplain and wetland areas. For the City to comply with FEMA base flood requirements, improvements to the existing flood reduction infrastructure must be made. Efforts during the project design were made to minimize disturbance in floodplain and wetland areas; however, there is no feasible alternative to completing the project outside of the existing area. All proposed improvements to the flood reduction system are to be made on previously disturbed areas that are part of the pre-existing flood reduction system. The City has considered the following alternatives and mitigation measures to minimize adverse impacts and to restore and preserve natural and beneficial values: i. The project must occur within the floodplain and wetland to meet the project-specific criteria to reduce risk to the City from a 500-year flood event, ensure long-term flood reduction, and have minimal impacts the environment. ii. Alternatives considered were: a.Alternative 1 - No Action: This alternative would leave the existing conditions as they are. Currently, the levee does not meet FEMA standards and the U.S. Army Corps of Engineers (USACE) has deemed the levee as minimally acceptable. This alternative was not selected because it would not adequately reduce risk to the City from flooding and has the potential to increase environmental impacts in the area resulting from flooding. b.Alternative 2 - Levee Raising: This alternative would include raising the levee using earthen fill at all locations where levee height does not meet the USACE original design or FEMA base flood requirements. This alternative would still require work in wetlands and floodplains and was not selected because it would put additional load on foundation soils in portions of the levee that could lead to further settlement and reduce public safety. c. Alternative 3 - Levee Raising and Floodwall Construction (Selected): This would include raising approximately 4,500 feet of the levee using earthen fill and/or floodwall construction. The levee would be raised to approximately the 500-year flood elevation plus a minimum of 2 feet of freeboard in earthen fill sections and 1 foot of freeboard in floodwall sections. The improved levee is designed to withstand the 200-year flood elevation and provide flood reduction to the 500-year FEMA flood elevation. Advantages to this option would include reducing risk of flooding, repairing deficiencies that have a high risk of embankment failure or seepage issues, and limiting the impact to adjacent areas. Disadvantages would include higher capital cost. iii. There is no feasible alternative to completing the project outside of the existing area. The project area is within a floodplain and wetlands. The following mitigation measures have been taken to ensure compliance with floodplain regulations: • Early notice of construction in a floodplain and wetlands was published in The World on November 17, 2018. • Minimization techniques for floodplain impacts are inherent in the project design. Many project elements include repairing and replacing existing structures, which will minimize impacts to the floodplain. • If permanent impacts to wetlands occur, mitigation would occur in consultation with the guidance of regulatory agencies and be documented through a compensatory wetland mitigation plan or similar. The City has re-evaluated the alternatives to building in the floodplain and wetlands and has determined that it has no practicable alternative. Environmental files that document compliance with Steps 3 through 6 of Executive Orders 11988 and 11990 are available for public inspection, review, and copying upon request at the times and location delineated in the last paragraph of this notice for receipt of comments. There are three primary purposes for this notice. First, people who may be affected by activities in floodplains and wetlands and those who have an interest in the protection of the natural environment should be given an opportunity to express their concerns and provide information about these areas. Second, an adequate public notice program can be an important public educational tool. The dissemination of information and request for public comment about floodplains and wetlands can facilitate and enhance federal efforts to reduce the risks and impacts associated with the occupancy and modification of these special areas. Third, as a matter of fairness, when the federal government determines it will participate in actions taking place in floodplains and wetlands, it must inform those who may be put at greater or continued risk. Written comments must be received by the City of Reedsport at the following address on or before December 14, 2018. City of Reedsport, 451 Winchester Avenue, Reedsport, Oregon 97467, Attention: Jonathan Wright, City Manager, via phone at 541-271-3603, or via email to Jonathan Wright jwright@cityof reedsport. org. A full description of the project may also be reviewed at the above address Monday through Friday during the hours of 8:00 a.m. to 5:00 p.m. (office is closed 12 p.m. to 1 p.m. daily and the first Wednesday of every month). [a minimum 7 calendar day comment period will begin the day after the publication and end on the 8th day after the publication] December 6, 2018 Published: The World & ONPA website (ID-20338876)

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