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Metropolitan Wastewater Management Commission Capital Improvement Program <br />DIGESTER MIXING IMPROVEMENTS <br />~-"' Ri~~ir Avenue <br />t...pp-u~rr }. .... .. .. ......j <br />~,-.. ,..,-" ~HUlll nay i- A Go. .._~ ~ ne ry ~ ~- <br />YF myn <br />~•_ <br /> <br />,~ J i`. _. .._ .._. <br /> <br /> <br />~ <br />~ .............. ... ._ <br /> <br />_ <br />~ ~ <br />} <br />i~~ <br />~~ <br />{ ~ f <br /> <br /> <br />r <br />fr b a7~ ~ .: ' 7 <br />.. <br />C~ ~~ i__J , <br />' -Gravity 9ak <br />' Tnlcwwnwr FwcNNY <br />~~. Prs4aw4s,a.r1! ~-5 <br /> <br />Fnc{e.rv,.... <br />r <br />Y <br />- _ <br />. .,x,, <br />i-- - <br />, <br />N <br />Project Phasing j <br />E~.KIr-'rv=~5prirx11ie1d lVPrf ~--' <br />Description: Replace gas mixing systems at three existing digesters with pump mixing systems. <br /> Includes funds for landscaping in the vicinity of digesters. ' <br />Status: The MWMC digester mixing system upgrades are underway by John Hyland Construction <br /> (general contractor). As of December `13, 2006, one digester mixing system has been <br /> upgraded and will soon be filled with sludge for functional testing. This is a phased <br /> construction project with only one digester off-line at a time for construction work. Project <br /> completion is anticipated by Apri12008. <br />} <br />Justification: This project will increase the active volume of the digesters, thus allowing for additional <br /> solids stabilization volume and potentially deferring the need to construct an additional <br /> digester. <br />Project Driver: Need for improved digester mixing to increase active digester volume. <br />Project Trigger: Sludge residence time (SRT) and volatile solids reduction design criteria. <br />;` <br />Project Type: 50% Capacity; 50% Perfiormance <br />Estimated Project Cost: $2,957,000 ` <br />~i <br />Expected Cash Flow: FY 07-08 =.$690,281 <br />Expenditure/Category: Prior Years 2007-08 2008-09 2009-10 2010-11 2011-12 Total <br />Design/Construction $2,266,719 $690,281 0 0 0 0 $2,957,000 <br />Other 0 0 0 0 0 0 0 <br />Total Cost $2,266,719 $690,281 $0 $0 $0 $0 $2,957,000 ( ', <br />Funding Source: Prior Years 2007-08 2008-09 2009-10 2010-11 2011-12 Total <br />Capital Reserve $2,266,719 $690,281 0 0 0 0 $2,957,000 <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 $2,266,719 $690,281 $0 $0 $0 $0 $2,957,000 <br />Page 62 'FY 07-08 BUDGET AND CIP <br />