Village of Tivoli Water Tow er Replacement May 17, 2018 Erin Moore, P.E. Project Manager
Project Timeline JAN JUNE MAY & JUNE DEC APRIL JULY 2018 2018 2017 2018 2018 2017 BOARD PUBLIC SEQRA REPORT LOAN TRANSFER GRANT APPROVAL MEETING NOTICE REQUEST INITIATION
Project Timeline JAN JUNE MAY & JUNE DEC APRIL JULY 2018 2018 2017 2018 2018 2017 BOARD PUBLIC SEQRA REPORT LOAN TRANSFER GRANT APPROVAL MEETING NOTICE REQUEST INITIATION
SEQRA Compliance ■ SEQRA Compliance – Most system improvements are replace in kind – Water tower replacement requires SEQRA process – Transfer to DCWWA ■ Water Tower Location – Pine Street Utility Parcel – McKnight Wellfield ■ Water Tower Style – Modern Multi-Leg – Composite Elevated Tank – Ground Tank with Pump System
Water Tank Locations
Water Tank Locations Ball Lot Wellfield Parcel Memorial Park Parcel Pine Street Utility Parcel
Tank Location Comparison Pine St. Utility Parcel McKnight Wellfield More water main Less water main Watermain improvements required improvements Loss of facilities on Additional park Park Impacts water tower parcel area gained Similar location – New location - Visual different aesthetic new vantage points Impacts Prominent in Less prominent in Village center Village center Proximity to security Distance to security fencing fencing
Tank Style Comparison Capital O&M Visual Cost Cost Impact $$ $$ Closest to Multi-Leg Existing $$$ $ Largest Visual CET Impact $ $$$ Ground Smallest Visual Impact
Multi-Leg Tank ■ Advantages – Lower capital cost – Structural problems evident due to staining & rust – Designed to meet Boiler Code = Watertight structure – Most similar in appearance to existing water tower – Can be custom painted ■ Disadvantages – High maintenance costs associated with repainting every 15 to 20 years – Ice can damage interior coatings – Larger foundation required
CET Tank ■ Advantages – Designed to be low maintenance – No regular painting – Single panels can be replaced if necessary – Roof requires no submerged structural components – Faster construction time that requires minimal equipment – Concrete column can be used as storage space ■ Disadvantages – Bolted panels increase potential for leaks – Structural damage can be caused by ice – Glass panels can be damaged by vandalism – Lifespan not definitive since only utilized since 1970s – Concrete pedestal may require occasional crack repair
Ground Tank ■ Advantages – Least visual impact – Lowest capital cost – Tank designed to be low maintenance – Single tank panels can be replaced – Roof requires no submerged structural components – Fastest construction time ■ Disadvantages – Lowest reliability due to pumps versus gravity – Pressure vault required – Highest operating cost – Bolted panels increase potential for leaks – Panels can be damaged by vandalism – Tank lifespan not definitive
Tank Life Cycle Cost GROUND TANK $4.5M NET PRESENT WORTH $4.0M CET TANK $3.5M $3.0M MULTI- $2.5M LEG $2.0M 1 10 20 YEAR 30 40 50 60
Memorial Park Location
Memorial Park Location
Memorial Park Location
Memorial Park Location
Memorial Park Location
Memorial Park Location
Memorial Park Location
Memorial Park Location
Memorial Park Location
Memorial Park Location
Memorial Park Location
Memorial Park Location
Memorial Park Location
Memorial Park Location
Memorial Park Location
Memorial Park Location
Memorial Park Location
Memorial Park Location
Memorial Park Location
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