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2009-09-22_PWETC_AgendaPacket
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2009-09-22_PWETC_AgendaPacket
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Commission/Committee
Commission/Authority Name
Public Works Commission
Commission/Committee - Document Type
Agenda/Packet
Commission/Committee - Meeting Date
9/22/2009
Commission/Committee - Meeting Type
Regular
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Review of Trash <br />Collection <br />Impacts <br />presented in Table 1 above. As an example, if we assume an <br />average of 6 rather than 8 total trash and recycling trips per week <br />for the current open competition system, the associated "Percent <br />of Total Vehicle Impacts" is 10.8% rather than the 14.0% for the <br />base case shown in Table 2. The associated reduction in the <br />"Percent of Total Vehicle Impacts" in this case is 3.4% (10.8% - <br />7.4°1°) rather than 6.7%. The corresponding reduction in the <br />"Allocated Portion of Total Annual Cost to Maintain Residential <br />Streets at Current Condition" would be approximately $86,000 <br />{$272,000 - $186,000) rather than the. $168,000 for the base case <br />($354,000 - $186,000} shown in Table 2. <br />Table 2 <br />COMPARISON OP OPEN COMPETITION ANIIbISTRICTEO COLLECTION <br />TRASH & RECYCLING 1/EHICI.E IMPACTS <br /> -Iota} Trash 8~ Ailocated.Partion o <br /> Recycling Total Annual Cost . Annual C02 Emissions <br /> to Maintain <br />Collection System Vehicle Passes I Percent of Total Residential Streets <br /> Week 1 Vehicle l.mpacts <br /> Residential ' at Current . <br /> Condition Pcunds Tans <br /> 'Street {$20138) <br />Open Competition S.0 14.0% $ 354,000 542,000 271 <br />Districted Collection 4.0 7.4% $ 18fi,000 271,000 138 <br />Reduction (Districted vs. a~n,~~'~ 4.0 6.7% ' $< 468,000 271,000 136 <br />{'~ The Districted Collection "Percent of Tofal Vehicle impacts" and "Annual Cost to Maintain Residential Streets at Current <br />Condition" is greater than half the calculated impacts for the Open Competition System due to the methodology used, which <br />assumes a constant number of vehicle trips for each scenario. <br />While the estimated impacts are subject to changes in the various <br />underlying assumptions, we believe that the analysis provides a <br />reasonable projection of the magnitude of trash truck impacts on <br />the City's residential streets, which is supported by various <br />independent third-party estimates. Appendix C {Comparative <br />Trash Truck Load Factors} provides a comparison of the <br />estimated passenger car equivalents estimated for the residential <br />trash and recycling trucks operating in the City to independent <br />references in support of the reasonableness of the estimates used <br />in our analysis. <br />Change in Street Design Standards <br />fZ3 <br />The City adopted new design standards for streets in 1999 that <br />are expected to increase the available vehicle loads streets can <br />handle over their lifetime. These new standards do not affect the <br />calculated percentage impacts of trash and recycling trucks on <br />residential streets, since that calculation is not based on street <br />design standards. Those standards would, however, be expected <br />to reduce annual maintenance costs over time. As a result, the <br />Section 2 - 6 <br />
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