Water System Planning Study

December 3, 2009

Agenda

• Purpose and Need

• Scope of Work

• Raw Water System

• Existing WTP

• Regulatory Issues

• Site Selection

• Proposed WTP

• Finished Water Transmission

• Proposed Improvements

• Costs

• Next Steps / Schedule

Purpose and Need

• WTP near capacity (currently 75%; KDOW sanctions at 85%)

• Aging water infrastructure

• Increasing demand

• Regulatory changes

Purpose and Need (cont.)

• Reliable supply needed

• Bluegrass Water Supply Commission

• Other alternatives studied

• City decided to build new WTP 5/08

• Keep existing WTP in service

Scope of Work

• Evaluate existing systems and future needs

• Assess new and future regulatory changes

• Identify best site for WTP

• Recommend necessary system improvements

 Raw Water Sources

• Kentucky River intake OK

• Maximum permitted withdrawal OK

• Changes in next permit (no step down)

• Concerns – Dam #10 condition, spills

Raw Water Sources

• Reservoir as backup supply

• Significant current leaks

• Siltation – lower intake clogged

• Aesthetic water quality issues 9 months of the year

 Raw Water Pump Station

• 2 existing pumps – 5.5 mgd firm capacity

• Originally designed for 4 pumps – 15 mgd firm capacity

• Recommend 1 new pump for 2 operating with 1 standby – could deliver 14+ mgd to new WTP

Raw Water Transmission Main

• Existing 18” line over 50 years old

• Limited existing capacity

• New 30” needed to new site (lifespan 50+ years)

• Existing 18” to continue serving existing WTP and reservoir

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 Existing Water Treatment Plant

• Initially constructed 1891

• Last major upgrade 1974

• Currently rated at 5.3 mgd

• Reliable, sustainable 3.2 mgd

Existing Water Treatment Plant

Need interim improvements:

• Replace filter media

• Sludge removal equipment

• Potential expansion not feasible on current site, based on 1999 studies