DESIGN STANDARDS MANUAL FOR WATER AND …
City of Phoenix Water Services Department
DESIGN STANDARDS MANUAL FOR
WATER AND WASTEWATER SYSTEMS
January 30, 2013
Water Services Department 200 W. Washington Street Phoenix, Arizona 85003-1697
Phone: (602) 534-5813 Fax: (602) 495-5843
January 30, 2013
Table of Contents
CHAPTER 1 INTRODUCTION
1.1 PURPOSE OF MANUAL ................................................................................1
1.2 AUTHORITY ..................................................................................................1
1.3 REVISIONS AND PUBLIC COMMENTS .......................................................1
1.4 ORGANIZATION AND INTERPRETATION OF MANUAL ............................1
1.5 STANDARD SPECIFICATIONS AND DETAILS ...........................................2
CHAPTER 2 DEVELOPMENT COORDINATION BY DEPARTMENTS
2.1 GENERAL ......................................................................................................3
2.2 WATER SERVICES DEPARTMENT (WSD) 2.2.1 General .............................................................................................3 2.2.2 WSD, Divisions of Responsibility ......................................................4 2.2.3 WSD, Development Services Provided ............................................4
2.3 PLANNING AND DEVELOPMENT DEPARTMENT (P&D) ...........................5
2.4 PUBLIC WORKS DEPARTMENT ? PLANNING, DESIGN & PROGRAMMING DIVISON .........................................................................................................5
2.5 STREET TRANSPORTATION DEPARTMENT (STR) AND AVIATION DEPARTMENT ..............................................................................................6
CHAPTER 3 GENERAL WATER AND SEWER DESIGN CRITERIA
3.1 GENERAL DESIGN CRITERIA/CONSIDERATIONS 3.1.1 Jurisdictional Agency Approvals........................................................7 3.1.2 Environmental and Cultural Regulatory Requirements .....................7 3.1.3 Community Notification and Involvement ..........................................8 3.1.4 Subsurface Investigations..................................................................8
3.2 ALIGNMENT AND EASEMENT REQUIREMENTS 3.2.1 General ..............................................................................................8 3.2.2 Residential Development with Private Access Ways ........................8 3.2.3 Residential Development Located within the City's Infill Incentive District ................................................................................................8 3.2.4 All Other Easements..........................................................................10 3.2.5 Structures Adjacent to Existing Water & Sewer Easements
3.3 SUBMITTALS 3.3.1 Water and Sewer Master Plans and Reports ....................................11 3.3.2 Design Reports ..................................................................................11 3.3.3 Construction Plans and Technical Specifications ? CIP Projects and Projects with City Financial Participation....................................12 3.3.4 Construction Plans ? Private Development Projects.........................13 3.3.5 Record Drawings ...............................................................................13
City of Phoenix Water Services Department
Design Standards Manual For Water And Wastewater Systems
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January 30, 2013
3.4 WATER DEMAND AND SEWER DESIGN FLOWS 3.4.1 General ..............................................................................................13 3.4.2 Water and Sewer Design Flows ........................................................13 3.4.3 Water Peak Flow ...............................................................................14 3.4.4 Sewer Peak Flow...............................................................................15
CHAPTER 4 WATER DISTRIBUTION AND TRANSMISSION SYSTEMS
4.1 WATER SYSTEM OVERVIEW 4.1.1 Pressure Zones ................................................................................16
4.2 WATER MAIN DESIGN CRITERIA APPLICABLE TO BOTH DISTRIBUTION AND TRANSMISSION MAINS 4.2.1 Water Main Extensions .....................................................................16 4.2.2 Water Main Classifications ...............................................................16 4.2.3 Water Main Design ............................................................................18 4.2.4 Fire Flow Demand .............................................................................18 4.2.5 Hydraulic Requirements ...................................................................18 4.2.6 Thrust Restraint for Distribution Mains .............................................18 4.2.7 Corrosion Protection/Ductile Iron Pipe .............................................18 4.2.8 Separation from Sanitary Sewer Mains ............................................18 4.2.9 Separation from Sanitary Sewer Connections ..................................18 4.2.10 Separation from Storm Drains and Culverts .....................................18 4.2.11 Separation from Other Utilities .........................................................19 4.2.12 Cross Connections and Backflow Prevention ...................................19 4.2.13 Shop Drawings .................................................................................19
4.3 ADDITIONAL DESIGN CRITERIA ONLY APPLICABLE TO DISTRIBUTION MAINS 4.3.1 General .............................................................................................19 4.3.2 Water Plan Requirements ? Check Lists...........................................19 4.3.3 Acceptable Pipe Materials ................................................................19 4.3.4 Pipe Sizing for Distribution Mains .....................................................19 4.3.5 Location/Alignment ............................................................................20 4.3.6 Distribution Main Cover ....................................................................20 4.3.7 Line Valves ........................................................................................20 4.3.8 Service Connections and Meters on Distribution Water Mains 6-inches and Larger...........................................................................21 4.3.9 Service Connections and Meters from Substandard Distribution Mains (smaller than 6-inch diameter) ................................................22 4.3.10 Water Meters and Sizing Guidelines ................................................23
4.4 ADDITIONAL DESIGN CRITERIA ONLY APPLICABLE TO TRANSMISSION MAINS 4.4.1 General ..............................................................................................24 4.4.2 Acceptable Pipe Materials .................................................................24 4.4.3 Pipe Sizing .........................................................................................25 4.4.4 Location/Alignment ............................................................................25 4.4.5 Cover .................................................................................................25 4.4.6 Line Valves ........................................................................................25 4.4.7 Restraint Systems..............................................................................26 4.4.8 Corrosion Protection ..........................................................................26 4.4.9 Side Outlets .......................................................................................26 4.4.10 Bypass Assemblies............................................................................26 4.4.11 Air/Vacuum Valve Assemblies...........................................................27 4.4.12 Access Outlets for 42-inch Mains and Larger....................................27 4.4.13 Use of Fire Hydrants and Placement.................................................27
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Design Standards Manual For Water And Wastewater Systems
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January 30, 2013
4.4.14 Testing and Final Acceptance ...........................................................27 4.4.15 Transmission Main Plan Requirements - Check Lists.......................27
4.5 FIRE LINE SYSTEMS 4.5.1 General ..............................................................................................27 4.5.2 Acceptable Pipe Materials .................................................................28 4.5.3 Design Requirements ........................................................................28 4.5.4 Fire Line Plan Requirements - Check List .........................................28 4.5.5 Plans Processing Guidelines .............................................................28
4.6 IRRIGATION SYSTEMS AND WATER FEATURES 4.6.1 General ..............................................................................................29 4.6.2 Backflow Prevention ..........................................................................29 4.6.3 Service Connections/Meters..............................................................29 4.6.4 Landscape Water Permit ...................................................................29
4.7 WATER ABANDONMENT 4.7.1 Plan Requirements Checklist ............................................................29 4.7.2 Abandonment Methods......................................................................29
4.8 FIRE HYDRANT REQUIREMENTS 4.8.1 General Location and Design Requirements.....................................30 4.8.2 Residential Subdivision Hydrant Location Standards........................31 4.8.3 Commercial and Multi-family Hydrant Location Standards ...............31 4.8.4 Private Fire Hydrants .........................................................................32 4.8.5 Maximum Fire Hydrant Spacing ........................................................32 4.8.6 Fire Hydrant Relocations ...................................................................34
CHAPTER 5 WASTEWATER COLLECTION SYSTEM
5.1 GENERAL REQUIREMENTS 5.1.1 Arizona Aquifer Protection Permit Requirements ..............................33 5.1.2 Maricopa County Environmental Health Code Requirements...........34 5.1.3 City Code Requirements....................................................................34
5.2 GRAVITY SANITARY SEWER LINES 5.2.1 General ..............................................................................................34 5.2.2 Acceptable Pipe Materials .................................................................35 5.2.3 Pipe Sizing ........................................................................................35 5.2.4 Slope..................................................................................................35 5.2.5 Alignment ...........................................................................................36 5.2.6 Cover .................................................................................................36 5.2.7 Sewer Main Connections at Manholes ..............................................37 5.2.8 Cross Connections Prohibited ...........................................................37 5.2.9 Separation from Water Mains ............................................................37 5.2.10 Separation from Water Supply System Structures ............................38 5.2.11 Separation from Storm Drains and Culverts......................................38 5.2.12 Separation from Other Utilities...........................................................38 5.2.13 Buoyancy ...........................................................................................38 5.2.14 Trenching, Bedding, and Backfill .......................................................38 5.2.15 Testing ...............................................................................................38 5.2.16 Depressed Sewers ............................................................................38
5.3 MANHOLES 5.3.1 General ..............................................................................................38 5.3.2 Manhole Locations.............................................................................39
City of Phoenix Water Services Department
Design Standards Manual For Water And Wastewater Systems
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January 30, 2013
5.3.3 Manhole Spacing ...............................................................................39 5.3.4 Manhole Diameter .............................................................................39 5.3.5 Metered Manholes .............................................................................39 5.3.6 Clean Outs .........................................................................................40 5.3.7 Manhole Stub Outs and Knock Outs .................................................40 5.3.8 Drop Sewer Connections...................................................................40 5.3.9 Flow Channel.....................................................................................40 5.3.10 Bench.................................................................................................40 5.3.11 Water Tightness.................................................................................40 5.3.12 Testing ...............................................................................................40 5.3.13 Corrosion Protection for Manholes ....................................................40 5.3.14 Junction Structures ............................................................................40 5.3.15 Insecticide Coating ............................................................................40
5.4 SERVICE CONNECTIONS 5.4.1 General ..............................................................................................41 5.4.2 Service Connection Sizes..................................................................41 5.4.3 Service Connections in Manholes .....................................................41 5.4.4 Service Connection Installation Requirements..................................41
5.5 WASTEWATER LIFT STATIONS AND FORCE MAINS................................42
5.6 ALLOWABLE DISCHARGES AND PRELIMINARY TREATMENT................42
5.7 SEPTIC SYSTEMS WITHIN THE CITY OF PHOENIX 5.7.1 City Ordinances Which Apply to Septic Systems ..............................42 5.7.2 When Septic Systems May be Allowed .............................................42 5.7.3 Existing Septic Systems ....................................................................43
Appendix A ? WSD Polices and Procedures Website link to Water and Sewer Policies................................................................44
APPENDIX B - Maricopa Association of Governments Specifications and Details Website link to MAG Specifications and Details.......................................................45 Website link to the COP Supplements to MAG Specifications and Details .............45
APPENDIX C - Arizona Administrative Code Website link to the Arizona Administrative Code......................................................46
APPENDIX D - The Code of the City of Phoenix...............................................................47
APPENDIX E - Definitions and Terms................................................................................48
APPENDIX F ? Acronyms ...................................................................................................52
City of Phoenix Water Services Department
Design Standards Manual For Water And Wastewater Systems
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