Res-2018-122 PSA CenturyWest - Laserfiche WebLink

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Based on previous site investigations, conducted during the Airport Master Plan project, no significant biotic resources are anticipated. As such, this scope does not include a Biological Assessment. Products: The Consultant will gather this information along with any information received from correspondence in Task 3.1 and provide a summary memorandum to the FAA and the County for submission to the WDFW and USFWS. Task 3.4 -Wetland Delineation and Functional Assessment Objective: Complete a Wetlands Delineation within the Direct Study Area . Approach: Consultant will complete wetland delineation and prepare a Wetland Delineation Report that details the current condition and extent of wetlands in the direct study area; flagged wetland boundaries will be surveyed as discussed in Task 2.4. Consultant will prepare a report suitable for submittal to the US Army Corps of Engineers (Corps) for permitting under Section 404 of the Clean Water Act and to the County for permitting under its critical area ordinance. The report will include information on the topography, vegetation, soils, and hydrology of each wetland in the project area and will include data sheets documenting upland and wetland areas. Consultant will survey the wetland boundaries in the field and a map showing wetland boundaries will be included in the delineation report. Products: A draft report of the Wetlands Delineation report will be provided for review by the FAA and the County for review and comment. Upon revision, review comments will be addressed in the final report. Task 3.5 -Floodplain Assessment Objective: Complete a hydraulic engineering analysis to assess potential for the proposed projects to impact floodplains associated with the nearby Whiskey and Mercer Creek, and determine flood reduction alternatives. Approach: Consultant will complete a floodplain assessment and prepare a report that details the current conditions, the potential for the proposed projects to impact floodplains and create flooding, and recommended impact reduction alternatives. Hydraulic modeling will be performed as part of the assessment. Previously collected data and information will be utilized to the greatest extent possible while performing the assessment and formulating the report. The report will document assessment study methods, assumptions, analyses and results and be consistent with Kittitas County Code, including Chapter 14.08, Flood Damage Prevention. The results of the report will be used to formulate design alternatives, the 'preferred alternative', and potential for impacts to floodplains and obtaining a floodplain development permit, if needed (See Task 3.9). The alternatives analysis will consider flood alleviation for the on-site projects; as well as any in-direct on-site or off-site flood alleviation improvements (as necessary) to mitigate worsening of flood impacts to in-direct areas. Should other floodplain related activities be necessary, Consultant will prepare a separate scope and fee to assist as needed. This additional work will be conducted under a separate agreement or as an amendment to this scope of work. Bowers Field Airport Improvements EA April 27, 2018 10