Item 4 - Ord./Metro Plan Amend. - Laserfiche WebLink

Home Browse Search

4. Modify Chapter IV. Of the Public Facilities and Services Plan, by modifying the subdivision entitled "Wastewater System condition Assessment" (presently on page 82) to read as follows: Wastewater System Condition Assessment Treatment: MWMC Wastewater Treatment System MWMC existing infrastructure is monitored for problems that need to be addressed during operational and maintenance activities. MWMC has ongoing programs to help plan for and implement equipment replacement and major rehabilitation of existing systems. With these on going programs used to detect existing problems, the infrastructure can be maintained and preserved to help extend its useful life for future years. In March of 2003, MWMC hired CH2M HILL to evaluate and plan for regional wastewater capital improvements that will serve the Eugene/Springfield urban growth boundary into year 2025. MWMC will need to implement the recommended improvements to meet regulatory requirements based on projected pollution loads and flows. CH2M HILL as part of its work to evaluate and plan for regional wastewater improvements has prepared a technical memo related to "Flow and Load Projections" dated April 12, 2004. This historical and projected information is being used to plan for needed MWMC capital improvements based on engineering evaluation methods and by comparing technology options. It is estimated that approximately $160 million dollars (in 2004 dollars) are needed for MWMC projects to address regulatory requirements and growth through year 2025. Con veFan ce: Conveyance capacity and inflow and infiltration (I/I) ratios are important criteria by which to assess the performance of a wastewater collection system. Conveyance capacity is a function of adequate pipe sizing and measures a system's ability to move effluent efficiently. Inflow and infiltration ratios express the amount of stormwater entering a sewer system through defective pipes and pipe joints, or through the cross connection of stormwater lines, combined sewers, catch basins, or manhole covers. Such extraneous stormwater entering the wastewater system unnecessarily burdens both conveyance and treatment facilities. Appendix B Page 3