Tour of ww collection system 11 4-2011

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Tour of ww collection system 11 4-2011

  1. 1. Tour of Wastewater Collection System Don Moore Town of Yountville Public Works Department/Utilities Division
  2. 2. Introduction of Wastewater System• Joint Treatment Facility (JTP)• Recycled Water System/Discharge to Napa River• Sewer Collection System• WW Pump Station
  3. 3. Rector Watershed Views Looking East WineriesYountville Veterans Home
  4. 4. Joint Treatment Plant FinalSecondary Primary Chlorine Contact Effluent Pond
  5. 5. Collection System
  6. 6. Wastewater Collection System• System comprised of 634 residential & 76 Commercial Customers• Reduce Inflow of Rainwater and Infiltration of Groundwater• Sewer System Management Plan• Maintain and Improve Pump Station• Replace Sewer Pipes
  7. 7. Elements of Sanitary Sewer Management Plan• Goals• Organization• Overflow Emergency Response Plan• Fats, Oils, and Grease Control Program• Legal Authority
  8. 8. Elements of Sanitary Sewer Management Plan (cont.)• Measures and Activities• Design and Performance Provisions• Capacity Management• Monitoring, Measurement and Program Modifications• SSMP Program Audits
  9. 9. FOG (Fats, Oils and Grease)
  10. 10. Hardened Grease Chunk
  11. 11. “Root Ball”
  12. 12. “Break-in Lateral” vs. Factory Made
  13. 13. Broken Clay Lateral
  14. 14. Cast In Place Point Repair Before After
  15. 15. Sag in Pipe (Abandoned K-Line)
  16. 16. Smoke Testing
  17. 17. Sewer Line Cleaning
  18. 18. Pipe Replacement
  19. 19. Construction of New Manhole Base
  20. 20. Finished Manhole Base
  21. 21. Epoxy Coating (System Loop)
  22. 22. Sewer Main Replacement Projects to Date• Jefferson St, from Madison to Humbolt ($230,000 in 2008)• Yount St, from Finnell to Hopper Creek ($90,000 in 2008)• Mulberry Extension ($70,000 in 2008)
  23. 23. Sewer Main Replacement Projects to Date (cont.)• Extension of the B-Line on Washington Street to Land Lane ($567,000, 2009)• Re-route of F-Line to remove sag and creek crossing ($70,000 in 2009)• Abandonment/Consolidation Project on North Washington ($120,000 in 2010)
  24. 24. Collection System Projects for the Future• Madison Street sewer main replacement from Washington Street to Yount• Yount Street sewer replacement from Hopper Creek to Monroe• “Slip-Line” F-Line from Champagne Drive to Oak Circle• Rehabilitation/Upgrades @ Peter J. Bardesonno Memorial Pump Station (Study required)
  25. 25. Wastewater Pump Station Converted in 1977
  26. 26. Old Check Valve After Replacement
  27. 27. New BioAmp Process
  28. 28. Introduction of FOG Fighting Bacteria
  29. 29. Tie-In Point for Both Major Sewer Mains
  30. 30. Pump Station “Wet-Well”
  31. 31. Newly Installed Hoist
  32. 32. Spare Pump Ready For Installation
  33. 33. Pump VFD’s (Variable Frequency Drives) and Level/Pump Control System
  34. 34. Flow Meter
  35. 35. In Case of Emergency
  36. 36. Projects Completed• Flygt submersible pumps installed (1996)• VFD’s Installed (1996)• New emergency generator installed (2004)• Spare pump purchased and installed (2005)• Maintenance activities performed (on-going)
  37. 37. Pump Station Upgrades• Pump Station originally constructed/re-designed in 1977 as part of Joint Treatment Plant Project• VFD controllers are in need of replacement• New level control system is necessary• Force main, pumps and all piping should be evaluated to see if it should be replaced/upsized

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