1. Hydraulic Optimization of the Northern Water Supply System Presentation by: Tom Charles, P.E., DEE Jim Kriss, P.E. Jennifer Wendrowski, E.I.T. September 2004

2. ECCV H 2 06 Water Supply Facility  Renewable Water Supply Source  Alluvial Wells and Delivery Network  Reverse Osmosis Treatment Plant  32 Mile Transmission Pipeline  2 Pump Stations  Phase 2 Improvements (Future) WTP & High Service PS Booster PS Smoky Hill Storage

3. 409 psi 324 psi 24” f 10 MGD Alternative No. 1 – Base Model  System Consists of RO WTP RO WTP HSPS HSPS BPS-1 + Tank BPS-1 + Tank Storage Tanks Storage Tanks  32 miles of 24-inch pipe  Problem: high discharge pressure from HSPS

4. Alternative No.2 – Inline Booster Model  System Consists of: RO WTP RO WTP HSPS HSPS In-line BPS-2 + Tank In-line BPS-2 + Tank BPS-1 + Tank BPS-1 + Tank Storage Tanks Storage Tanks  7 miles of 24-inch pipe  25 miles of 30-inch pipe 143 psi 205 psi 274 psi 24” f 30” f 10 MGD 13 MGD

5. Alternative No.3 – Booster Injection Model  System Consists of: RO WTP RO WTP HSPS HSPS Injection BPS-2 + Tank Injection BPS-2 + Tank BPS-1 + Tank BPS-1 + Tank Storage Tanks Storage Tanks  7 miles of 24-inch pipe  25 miles of 30-inch pipe 360 psi 213 psi 266 psi 24” f 10 MGD 13 MGD 30” f

6. Alternative 1 - Pressure Trace for Suction/Discharge (No Controls) J-10J-102J-11

7. Alternative 1 - HGL Envelope (No Controls) HSPS BPS 1 Smoky Hill

8. Alternative 1 - Pressure Trace for Suction/Discharge (With Controls) J-10J-102J-11

9. Alternative 1 - HGL Envelope (With Controls) HSPS BPS 1 Smoky Hill

10. Alternative 2 - Pressure Trace for Suction/Discharge (No Controls) J-10J-11J-4

11. Alternative 2 - HGL Envelope (No Controls) BPS 2 BPS 1 Smoky Hill HSPS

12. Alternative 2 - Pressure Trace for Suction/Discharge (With Controls) J-10J-11J-4

13. Alternative 2 - HGL Envelope (With Controls) HSPS BPS 2 BPS 1 Smoky Hill

14. Pump Selection - VSD versus CSD  Meet System Operating Requirements Match RO Membrane Skid ProductionMatch RO Membrane Skid Production Minimize Tank FluctuationsMinimize Tank Fluctuations Minimize Pump Cycle TimeMinimize Pump Cycle Time  Minimize Capital and Operating Costs  Minimize Pump Room Footprint

15. 2 Duty VFD Pumps, 1 Standby BPS Pump Head/System Curve – 30 inch North Pipeline Floway: 18 MKH (5 stg, 1770 rpm, 11.875” trim), 2 VFDs

16. 5 Duty CSP Pumps, 1 Standby BPS Pump Head/System Curve – 30 inch North Pipeline Floway: 14 JKH (6 stg, 1770 rpm) 5 pumps

17. Operating Cost Comparison  VSP/ CSP Capital Costs Similar  Justify VFD Capital Cost? Annual Billing EstimatesAnnual Billing Estimates Present Worth AnalysisPresent Worth Analysis  Pump Power Use for Flow Targets  Monthly Demand Distribution  System Operation Intermittent Winter OperationIntermittent Winter Operation Max Capacity during Summer PeakMax Capacity during Summer Peak

18. Pump Power Requirements

19. Operating Cost Comparison  VSP/ CSP Capital Costs Similar  Justify VFD Capital Cost? Annual Billing EstimatesAnnual Billing Estimates Present Worth AnalysisPresent Worth Analysis  Pump Power Use for Flow Targets  Monthly Demand Distribution  System Operation Intermittent Winter OperationIntermittent Winter Operation Max Capacity during Summer PeakMax Capacity during Summer Peak

20. Variable Speed Billing Estimate

21. Constant Speed Billing Estimate

22. Questions & Answers