Water system planning study
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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.

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Water System Planning Study

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Water system planning study

Water System Planning Study

December 3, 2009


Agenda

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

Purpose and Need

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

Aging water infrastructure

Increasing demand

Regulatory changes


Purpose and need cont

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

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

 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 sources1

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

 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

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


Existing water treatment plant

 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 plant1

Existing Water Treatment Plant

Need interim improvements:

  • Replace filter media

  • Sludge removal equipment

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


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