Final Site Selection Report Kittitas_082118

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SECTION 1 – INTRODUCTION 1-2 EN1213161143SAC DRAFT – 12/23/16 Table 1-1. Kittitas County Population Estimates: 2015 to 2035 Kittitas County Transfer Station Basis of Design Report Year Total Estimated Population Intermediate Series High Series 2015 42,592 47,759 2020 45,255 52,395 2025 47,949 57,065 2030 50,567 61,652 2035 53,032 66,075 % growth (2015 to 2035) 24% 38% Average % growth 31% Source: http://www.ofm.wa.gov/pop/gma/projections12/GMA_2012_county_pop_projections.pdf 1.3 Purpose of Basis of Design Report This Basis of Design document provides the project team with vital facility design parameters and land area required for a new facility. This information was gathered during the project workshop that was conducted with County staff and the existing site operator on November 2, 2016. Key “takeaways” from the workshop included design parameters (tons per day, peak daily flows, tipping floor storage capacity) for current and future materials (solid waste, recycling, green waste, other materials), and confirmation about other important facility parameters such as compost area size, administrative building requirements, parking requirements (including contract operator truck parking), and County equipment preferences (scales, software, equipment, etc.). 1.4 Process Selection The new transfer station will be designed to operate in a similar fashion to the existing facility and will use open-top trailers to haul the municipal solid waste (MSW). The main transfer building will be a two-level facility with a drive-through tunnel for loading. Commercial collection vehicles and residents will deposit their loads directly onto the tipping floor (the upper level). A front-end loader will move the waste from the tipping floor to floor opening(s) over the tunnel to push the MSW into the trailers below. In addition to the main transfer building, the facility will include a composting area, MRW building, recycling depot, and support equipment and structures.