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MWMC FACILITIES PLAN Project Type Allocation Effluent reuse takes WPCF effluent out of the Willamette River. Potential end uses include irrigation of landscaping and agricultural lands. Development of reuse will help MWMC comply with existing and future thermal load limits, which may become more stringent. Reuse will also assist with future compliance with mass load limits. As reuse is expanded and effluent is used for irrigation or other uses instead of discharged to the Willamette River, capacity is essentially freed up for new users. Effluent reuse benefits both existing users and growth proportionate to their average flow contribution and is therefore allocated to Performance. 8.6.7 Other Projects Temporary Construction Management, Facility Plan Update Projects, Wet Weather Flow Management Plan Update, and Support Development of Private Lateral Program Facility Component Allocation These projects serve MWMC's overall efforts and are allocated to Support Facilities. Project Type Allocation These projects identify long-term planning approaches and/or enable MWMC to continue to operate the facilities in a manner that complies with local, state, and federal guidelines. It is assumed that these projects benefit both existing and the growth increment equally and are therefore allocated to Performance. Mixing Zone Study Update Facility Component Allocation The purpose of this study is to determine the characteristics of the mixing zone of the outfall to the Willamette River and is therefore allocated to the Disinfection/Outfall facility component. Project Type Allocation For the same rationale as the other study projects, this project is allocated to Performance. 8.6.8 Monthly Sewer Rates Assuming that the $144 million Alternative 5 is implemented, three rate scenarios were developed for the next 10 years. All three scenarios assume the approximate 40/60 split for funding the 20-year project list between SDCs and user rates so that roughly $86.2 million of the $144 million would be funded by rates. The rate scenario evaluation demonstrated that MWMC has various options available to phase in increased rates to provide revenue adequacy. 8.6.9 Impact of Implementing Alternative 4 If DEQ does not approve Alternative 5 - Parallel Primary/Secondary Treatment ($144 million), and Alternative 4 - High-Rate Clarification ($157 million) is implemented instead, an additional $13 million will have to be spent on capital investments. The allocation between growth impact fees (SDCs) and existing users (user rates) for this additional expenditure will be identical to the allocation for the Parallel Primary/Secondary Treatment project in the 20-year project list. Based on Table 8.6.1-2, 29 percent of this 8-14 MWMC_8.0_REV5.DOC