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SECTION 1—INTRODUCTION <br />Table 1-1. Kittitas County Population Estimates: 2015 to 2035 <br />Kittitas County Transfer Station Basis of Design Report <br />Total Estimated Population <br />Year Intermediate Series High Series <br />2015 42,592 47,759 <br />2020 45,255 52,395 <br />2025 47,949 57,065 <br />2030 50,567 61,652 <br />2035 53,032 66,075 <br />% growth (2015 to 2035) 24% 38% <br />Average % growth 31% <br />Source: <br />http://www.ofm.wa.gov/pop/gma/proiectionsl2/GMA 2012 county pop pro 0ections.pdf <br />1.3 Purpose of Basis of Design Report <br />This Basis of Design document provides the project team with vital facility design parameters and land <br />area required for a new facility. This information was gathered during the project workshop that was <br />conducted with County staff and the existing site operator on November 2, 2016. Key "takeaways" from <br />the workshop included design parameters (tons per day, peak daily flows, tipping floor storage capacity) <br />for current and future materials (solid waste, recycling, green waste, other materials), and confirmation <br />about other important facility parameters such as compost area size, administrative building <br />requirements, parking requirements (including contract operator truck parking), and County equipment <br />preferences (scales, software, equipment, etc.). <br />1.4 Process Selection <br />The new transfer station will be designed to operate in a similar fashion to the existing facility and will <br />use open -top trailers to haul the municipal solid waste (MSW). The main transfer building will be a <br />two-level facility with a drive-through tunnel for loading. Commercial collection vehicles and residents <br />will deposit their loads directly onto the tipping floor (the upper level). A front-end loader will move the <br />waste from the tipping floor to floor opening(s) over the tunnel to push the MSW into the trailers below. <br />In addition to the main transfer building, the facility will include a composting area, MRW building, <br />recycling depot, and support equipment and structures. <br />1-2 EN1213161143SAC DRAFr-12/23/16 <br />