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Metropolitan Wastewater Management Commission Capital Improvement Program <br />OUTFACE MIXING ZONE STUDY <br />~/~/~~~ N,Sve ~wenue <br /> t <br /> Nt $OCi1Mil'~ ~- Mrs~l <br />"' <br />.,. <br />~H~~tw~® _ . ~_ ~____~ <br />_...~~ t '_ <br /> <br />,~ ~ r., f ,.,.~., <br /> <br />~ <br /> <br /> ' <br />,. ~~ ~~ ~ <br /> ~ r ~ <br /> <br />~ a; <br />; ' Y <br />~ i V <br />_. -Gravity Sett <br />.~" '1"i~ic~Anwe ~facliipy <br />~ <br />R <br /> <br />F`rw0.+ewAMN~dI <br />1'ic/may <br />{~~ <br />~ ~1 <br /> <br />- \ <br /> <br /> s Project Phasing <br /> F.~at7r_ ~1~'-Sptiai~lfir(rf 1NPCF <br />Description: Update the 1994 Mixing Zone Study to account for additional 100 million gallons per day <br /> (mgd) (approximate) bankside outfall capacity and for changes to the Willamette River <br /> morphology that may have occurred since the last study was conducted. <br />Status: Under the Facilities Plan Engineering Services contract, CH2M Hill is currently reviewing <br /> the hydraulics at the tail end of the plant to reevaluate the need for and sizing of the new <br /> outtall. This information will be necessary prior to initiating a mixing zone study. <br />Justification: Mixing zone regulations have changed since the last mixing zone study was completed. <br /> Addition of a new bankside ouffall will trigger the need to study how mixing in the river will <br /> occur downstream of the outfall and may impact design of the outfall. <br />Project Driver: Current diffuser and bankside ouffall may be insufficient to accommodate peak wet <br /> weather flows. <br />Project Trigger: Capacity to handle peak flows in the plant by the year 2010. <br />Project Type: 100% Performance <br />Estimated Project Cost: $186,000 <br />Expected Cash Flow: FY 07-08 = $186,000 <br />ExpenditureiC;ate~orv: rriorYears 1007-08 2008-Oy 10(19-'lll 2U1U-1'I 2(11'1-'11 Totai <br />Design/Construction 0 0 0 0 0 0 0 <br />Other 0 $186,000 0 0 0 0 $186,000 <br />Total Cost $0 $186,000 $0 $0 $0 $0 $186,000 <br />Funding Source: Prior Years 2007-08 2008-09 2009-10 2010-11 2011-12 Total <br />Capital Reserve 0 $186,000 0 0 0 0 $186,000 <br />EPA Grant 0 0 0 0 0 0 0 <br />SDC Reimbursement Reserve 0 0 0 0 0 0 0 <br />SDC Improvement Reserve 0 0 0 0 0 0 0 <br />Equipment Replacement Reserve 0 0 0 0 0 0 0 <br />Total Cost $0 $186,000 $0 $0 $0 $0 .$186,000 <br />Page 57 FY 07-08 BUDGET AND CIP <br />