Program Delivery Plan

SECTION 3. SOUTH BASIN PROJECTS
A splitter box is constructed on the end of the solids contact basins to distribute the
flow between the existing and proposed final settling tanks
Construct four additional final clarifiers at 134-foot diameter each
Conversion of chlorine gas disinfection to hypochlorite disinfection and construction of
an additional chlorine contact basin
Construction of a new effluent PS (200 MGD)
Existing PS will be abandoned
New PS will consist of vertical turbine pumps mounted on a concrete slab. Discharge
piping and flow metering will be above grade.
Construction of parallel effluent pipeline and river outfall structure
Construction of odor control for the primary clarifiers effluent weirs and the existing
solids processing building.
Yard piping
Site work
Demolition
Methane storage/power conversion facilities
Miscellaneous yard piping and electrical
Preliminary Master Plan Improvements
Several Master Plan improvements were outlined in the Draft Wastewater Master Plan
(CH2M HILL, May 2008). The following are the principal project elements as modified
during the project design.
Secondary electrical source consisting of on-site engine/generators
Improvements to the existing solids thickening and dewatering facilities including new
thickened sludge mixing tanks
Repair and improvements to existing anaerobic digesters including a new sludge
heating system utilizing digester gas and hot water boilers
Rehabilitation of existing buildings
Construction of a plant SCADA system
Construction of new laboratory and administration buildings
Total Construction Bid Amount for the Wet Weather Improvements is $92,200,000.
Total Construction Bid Amount for the Preliminary Master Plan Improvements is
$15,000,000.
Total Construction Bid Amount for the entire project is $107,200,000.
Scheduled Design Appropriation Year was 2009.
Scheduled Construction Appropriation Year is 2011.
Design is On-Going.
GNV31031158547.DOCX/103440004 3-106 JANUARY 2011
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