FY 2006 MWMC Budget and CIP - Laserfiche WebLink

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SOUTH AERATION BASIN IMPROVEMENTS Facility Process Component Secondary Treatment $7,603,000 Total Cost PRIOR Costs EXPEND- 2005-06* 2006-07 2007-08 2008=09 2009-10 TOTAL I7URES . Design & Engineering 100,000 590,000 690,000 Construction 6,913 000 6 913 000 TOTAL 100 000 7 503 000 0 0 0 0 7,603000 FUNDING SOURCE Capital Reserve 100,000 6,103,000 6,203,000 SDC Improvement Reserve 1 400 000 1,400 000 TOTAL 100,000 7,503,000 0 0 0 0 7,603;000 "Inflated from 2004 by 6.3 ~° to F-YU5-U6 dollars (tngrneenng rvews Kecora racror~ ana v"/o rnerearzer PROJECT: South Aeration Basin Improvements Design and Construction DESCRIPTION: Add step feed, anoxic selectors, and fine bubble diffusers to south aeration basin. Remove hydraulic restrictions in both south and north aeration basins (effluent gates). Includes future primary effluent flow control gates for both north and south aeration basins. JUSTIFICATION: PROJECT DRIVER: PROJECT TRIGGER: TYPE OF PROJECT: ESTIMATED PROJECT COST (FY 2004-05 Dollars): INFLATED PROJECT COST (FY 2005-06 Dollars): PHASING: Increase the dry weather aeration basin treatment capacity to 65 mgd with respect to ammonia (i.e., with nitrification) and increase the sustained (i.e., on a weekly basis) wet weather treatment capacity to 130 mgd. NPDES permit includes ammonia limit requiring nitrification in dry weather and expansion of wet weather capacity to treat wet weather flows to meet NPDES monthly and weekly suspended solids limits. Maximum month dry weather flow of 25 mgd requiring nitrification. May flows and temperatures could require the use of the south aeration basins in conjunction with the north aeration basins. Peak wet weather flows above 103 mgd require hydraulic modifications. 50% Capacity; 50% Performance $6,900,000 $7,603,000 Budgeted for FY 2004/05, Rebudgeted for FY 2005!06 Page 69 FY OS-06 BUDGET AND CIP