Standard Plans & Specifications

The “City of Napa Standard Specifications and Standard Plans” (City Standards) is a document that provides a summary and guide to key elements of the regulations and policies governing the design and construction of public improvements within the City of Napa.

The City of Napa requires design engineers, developers, and contractors to comply with the City Standards for projects within the City right-of-way and for City maintained facilities within easements. City Standards are intended to create uniformity of constructed infrastructure. Standardization of constructed facilities provides the City with the best value by minimizing long-term maintenance and operational costs.

The City Standards are organized by the following categories: Streets, Electrical, Drainage, Stormwater, Water, Parks and Landscaping, Street Trees, and Fire.

If you would like to purchase a hard-copy set of the City Standards you can do so at the City of Napa Community Services Building, 1600 First Street.

Standard Plans & Specifications (updated October 2018):

Streets Standard Plans

Water Standard Plans

  1. Combined Water Standards-(PDF)
  2. W-01 - 0.75-in and 1-in Water Service-(PDF)
  3. W-02A - 1.5-in Water Service-(PDF)
  4. W-02B - 2-in Water Service-(PDF)
  5. W-03A - 3-in Water Service-(PDF)
  6. W-03B - 4-in Water Service-(PDF)
  7. W-03C - 6-in Water Service-(PDF)
  8. W-04A - 2-in Fire Service-(PDF)
  9. W-04B - 4-in and Larger Fire Services-(PDF)
  10. W-04C.1 - Metered Fire Service with Private Hydrants
  11. W-04C.2 - Metered Fire Service with Private Hydrants Notes
  12. W-05A - DCV for .75-in and 1-in Residential Services-(PDF)
  13. W-05B - DCV for 1.5-in and 2-in Residential Services-(PDF)
  14. W-05C - DCV (Exterior) for 3-in to 8-in Residential Services-(PDF)
  15. W-05D.1 - Interior DCV BFD Installation for 3" to 8" for Residential Services
  16. W-05D.2 - Interior DCV BFD Installation for 3" to 8" for Residential Services Notes
  17. W-06A - RP (Exterior) for .75-in to 2-in Commercial Services-(PDF)
  18. W-06B.1 - Interior Reduced Pressure BFD Installation for Commercial Services
  19. W-06B.2 - Interior Reduced Pressure BFD Installation for Commercial Services Notes
  20. W-06C.1 - Exterior Reduced Pressure BFD Installation for Commercial Services
  21. W-06C.2 - Exterior Reduced Pressure BFD Installation for Commercial Services Notes
  22. W-06D.1 - Interior Reduced Pressure BFD Installation for Commercial Services
  23. W-06D.2 - Interior Reduced Pressure BFD Installation for Commercial Services Notes
  24. W-07A - DCV (Exterior) for 2-in Fire Services-(PDF)
  25. W-07B.1 - Interior DCV BFD Installation for Fire Services
  26. W-07B.2 - Interior DCV BFD Installation for Fire Services Notes
  27. W-07C - DCV (Exterior) for 4-in to 8-in Fire Services-(PDF)
  28. W-07D - DCV (Interior) for 4-in to 8-in Fire Services-(PDF)
  29. W-08 - Fire Hydrant-(PDF)
  30. W-09 - Valves-(PDF)
  31. W-10A - 2-in Blow-Off Assembly-(PDF)
  32. W-10B - 2-in Blow Off (TOP)-(PDF)
  33. W-10C - Transmission Valve_Blowoff_Bypass-(PDF)
  34. W-10D - Water Sampling Station-(PDF)
  35. W-10E - Motorized Transmission Valve_Blowoff_Bypass-(PDF)
  36. W-11A - 1-in Air Release and Vacuum Valve-(PDF)
  37. W-11B - 2-in Air Release and Vacuum Valve-(PDF)
  38. W-12 - General Water Notes-(PDF)
  39. W-13A - Water Trench Detail-(PDF)
  1. W-13B - DOT Water Main Casing-(PDF)
  2. W-14A - Thurst Block and Wingwalls-(PDF)
  3. W-14B - Water Main Restraint Details-(PDF)
  4. W-15 - Water Main Offsets-(PDF)
  5. W-16A - Hot-Tap Detail-(PDF)
  6. W-16B - Tie-In-(PDF)
  7. W-17 - Abandonment of Existing Water Facilities-(PDF)
  8. W-18 - Water Facility Obstruction Separation Requirements-(PDF)
  9. W-19 - Future Water Main Extension Stub-(PDF)
  10. W-20A - Water Service Responsibility-(PDF)
  11. W-20B - Water Service Responsibility (Unmetered Service)-(PDF)
  12. W-21 - Installation of Fire Hydrant Pavement Markers-(PDF)
  13. W-22A - Horizontal Separation Requirements from Utilities-(PDF)
  14. W-22B - Vertical Separation Requirements from Utilities-(PDF)
  15. W-23A - Pipe Connectivity-(PDF)
  16. W-23B - Exothermic Weld-(PDF)
  17. W-23C - Bond Cables-(PDF)
  18. W-23D - Cable Splice-(PDF)
  19. W-24A - Anode Installation-(PDF)
  20. W-24B - Anode Installation (Fitting)-(PDF)
  21. W-24C - Anode Installation (Vertical Offset)-(PDF)
  22. W-24D - Anode Installation (Leak Clamp)-(PDF)
  23. W-24E - Anode Installation - Drivable Magnesium Anodes-(PDF)
  24. W-25A - Insulating Joint-(PDF)
  25. W-25B - Insulating Joint Coating-(PDF)
  26. W-26A - Test Station and Terminal Box-(PDF)
  27. W-26B - Anode Test Station (Existing Pipe)-(PDF)
  28. W-26C - Test Station Cable Identification-(PDF)
  29. W-27A - Test Station (Corrosion)-(PDF)
  30. W-27B - Test Station (Foreign Pipeline)-(PDF)
  31. W-28A - Anode Test Station (DIP)-(PDF)
  32. W-28B - Anode Test Station (Fire Hydrant)-(PDF)
  33. W-28C - Anode Test Station (Valve)-(PDF)
  34. W-28D - Anode Test Station (Cross)-(PDF)
  35. W-28E - Anode Test Station (Casing)-(PDF)
  36. W-29A - Wenner Four Pin Resistivity Test-(PDF)
  37. W-29B - Barnes Layer Resistivity-(PDF)
  38. W-29C - Soil Box Resistivity Test-(PDF)
  39. Water Distribution Design Provisions-(PDF)