2017-03-07-minutes-solid-waste - Laserfiche WebLink

Home Browse Search

SECTION 2—DESIGN PARAMETERS In 2015, the County weighed 161 septage hauler vehicles at the scalehouse and hauled 60 truckloads of leachate from the facility (compost stormwater ponds and transfer station tunnel) to the Ryegrass Landfill septage facility. In addition, the Ellensburg transfer station weighed Waste Management, Inc.'s curbside recycling trucks containing single stream and cardboard recycling material at the scalehouse (420 vehicles representing 1,283 tons). These loads are not included in the table above. Table 2-1 also does not include an estimated 50,000 to 60,000 customers that used the recycling drop- off area in 2015. In summary, the existing Ellensburg transfer station accepted, processed, and transferred approximately 27,000 tons of MSW, yard waste, and CDL from approximately 70,000 vehicles in 2015. 2.2 Projected Design Quantities and Traffic Projected waste quantities were estimated using 2015 quantities, a 30 -year design life, and OFM population projections (intermediate to high growth — 31 percent) through 2035. Table 2-2 summarizes the estimated design waste volumes for the proposed facility. Table 2-2 Recommended 2046 Design Parameters Kittitas County Transfer Station Basis of Design Report Parameter Quantity Unit Current waste tonnage 80 Tons per day Projected 2046 waste tonnage 105 Tons per day 2046 peak -hour tonsa 26 Tons per hour 2046 peak -hour trafficb 78 Vehicles per hour 2046 yard waste quantitiesc 7,145 Tons per year a Based on CH21A's previous experience, a peak hourly tonnage was estimated using 25 percent of the daily tonnage. bThe peak -hour vehicle count was determined by using the 2015 Peak Hour (Saturday, July 9, 2016) vehicle count and increasing it by the estimated growth (31 percent). c Yard Waste quantities are based on doubling the current quantities and increasing that amount by the estimated growth rate (31 percent). 2.3 Peak Storage To account for inclement weather conditions and other unexpected issues that may affect delivery of waste to the landfill, 5 days of peak storage are used to size the waste receiving and processing building. The 5 -day peak storage quantity is 525 tons and was calculated using five times the 2046 average daily throughput (105 tons per day). Contingency storage of up to 7,000 cubic yards (i.e., approximately 10 days of current waste receipts) could be accomplished by stacking waste 10' deep across the tipping floor. 2-2 EN1213161143SAC DRAFT— 12/23/16