WWAATTEERR AANNDD WWAASSTTEEWWAATTEERR PPRROOCCEEDDUURREESS AANNDD DDEESSIIGGNN MMAANNUUAALL OOCCTTOOBBEERR,, 22001111 DWU WATER AND WASTEWATER PROCEDURES AND DESIGN MANUAL TOC TABLE OF CONTENTS PREFACE P.1 ACKNOWLEDGEMENTS...........................................................................................i P.2 INTRODUCTION.......................................................................................................ii P.3 ABBREVIATIONS .....................................................................................................iii P.4 ENGINEERING CONVERSIONS ................................................................................iv CHAPTER 1 GENERAL DESIGN CRITERIA 1.1 REFERENCES...........................................................................................................1-1 1.2 GENERAL DESIGN APPROACH ...............................................................................1-2 1.3 PROJECT ORIGINATION .........................................................................................1-3 1.4 INTERNAL COORDINATION ....................................................................................1-3 1.5 INTERNAL RECORD SEARCH..................................................................................1-4 1.6 CONDITION CHECK AND PRELIMINARY DESIGN REPORT ....................................1-8 1.7 UTILITY LOCATION REQUEST ...............................................................................1-9 1.8 EASEMENT ACQUISITION .......................................................................................1-10 1.9 FIELD INVESTIGATION ..........................................................................................1-15 1.10 SURVEY…………………...………………………………………………………1-22 1.11 DESIGN……………………………………………………………………………1-23 1.12 FINAL UTILITY CHECK, PLAN REVIEW AND APPROVAL ......................................1-26 1.13 TRAFFIC CONTROL PLAN.......................................................................................1-27 1.14 FINAL PLANS AND SPECIFICATIONS………….......................................................1-29 1.15 PROJECT CONSTRUCTION…………......................................................................1-30 1.16 RECORD DRAWING AND ARCHIVE………….........................................................1-30 TABLE OF CONTENTS TOC-1 OCTOBER, 2011 DWU WATER AND WASTEWATER PROCEDURES AND DESIGN MANUAL TOC CHAPTER 2 WATER MAIN DESIGN GUIDELINES 2.1 REFERENCES ..........................................................................................................2-1 2.2 DWU WATER SYSTEM ..........................................................................................2-1 2.3 EVALUATION OF WATER MAINS FOR REPLACEMENT .........................................2-7 2.4 WATER MAIN SIZING ............................................................................................2-8 2.5 DEPTH OF COVER ..................................................................................................2-14 2.6 WATER PIPE MATERIALS & EMBEDMENTS .........................................................2-15 2.7 LOCATION ..............................................................................................................2-17 2.8 HORIZONTAL ALIGNMENT ....................................................................................2-18 2.9 VERTICAL ALIGNMENT..........................................................................................2-22 2.10 SEPARATION DISTANCE BETWEEN WATER & WASTEWATER MAINS .................2-26 2.11 CONNECTION OF EXISTING MAINS ........................................................................2-35 2.12 WATER MAIN APPURTENANCES ...........................................................................2-38 2.13 CORROSION PROTECTION......................................................................................2-53 2.14 ABANDONMENT OF WATER MAINS AND APPURTENANCES ..................................2-57 2.15 HYDROSTATIC TESTING & CHLORINATION..........................................................2-58 CHAPTER 3 WASTEWATER MAIN DESIGN GUIDELINES 3.1 REFERENCES...........................................................................................................3-1 3.2 DWU WASTEWATER INFRASTRUCTURE ...............................................................3-1 3.3 EVALUATION OF WASTEWATER MAINS FOR REPLACEMENT...............................3-5 3.4 SIZING WASTEWATER MAINS................................................................................3-6 3.5 DEPTH OF COVER ...................................................................................................3-13 3.6 WASTEWATER PIPE MATERIALS AND EMBEDMENT .............................................3-14 3.7 LOCATION...............................................................................................................3-18 3.8 HORIZONTAL ALIGNMENT.....................................................................................3-18 3.9 VERTICAL ALIGNMENT..........................................................................................3-19 TABLE OCF ONTENTS TOC-2 O,CTOBER 2011 DWU WATER AND WASTEWATER PROCEDURES AND DESIGN MANUAL 3.10 SEPARATION DISTANCE BETWEEN WASTEWATER & WATER MAINS .................3-19 TOC 3.11 CONNECTIONS TO EXISTING MAINS ......................................................................3-24 3.12 WASTEWATER APPURTENANCES...........................................................................3-25 3.13 INVERTED SIPHONS ................................................................................................3-33 3.14 WASTEWATER LIFT STATIONS ..............................................................................3-34 3.15 WASTEWATER FORCE MAIN………………………....................………………..3-35 3.16 ABANDONMENT OF WASTEWATER MAINS AND APPURTENANCES........................3-36 CHAPTER 4 RECLAIMED WATER MAIN DESIGN GUIDELINES 4.1 REFERENCES...........................................................................................................4-1 4.2 DEFINITION.............................................................................................................4-1 4.3 DWU RECLAIMED WATER SYSTEM......................................................................4-1 4.4 RECLAIMED WATER MAIN SIZING .......................................................................4-2 4.5 DEPTH OF COVER ...................................................................................................4-3 4.6 RECLAIMED WATER PIPE MATERIALS AND EMBEDMENT ...................................4-4 4.7 LOCATION...............................................................................................................4-7 4.8 HORIZONTAL ALIGNMENT.....................................................................................4-7 4.9 VERTICAL ALIGNMENT..........................................................................................4-7 4.10 SEPARATION DISTANCE BETWEEN RECLAIMED WATER AND WASTEWATER/ WATER MAINS........................................................................................................4-8 4.11 CONNECTIONS TO EXISTING MAINS ......................................................................4-9 4.12 RECLAIMED WATER MAIN APPURTENANCES.......................................................4-9 4.13 HYDROSTATIC TESTING.........................................................................................4-11 TABLE OCF ONTENTS TOC-3 O,CTOBER 2011 DWU WATER AND WASTEWATER PROCEDURES AND DESIGN MANUAL CHAPTER 5 TOC SPECIAL CRITERIA 5.1 GENERAL ................................................................................................................5-1 5.2 PAVEMENT CUT AND REPAIR CRITERIA ...............................................................5-1 5.3 HIGHWAY ACCESS CRITERIA ................................................................................5-13 5.4 RAILROAD ACCESS CRITERIA................................................................................5-17 5.5 CREEK CROSSING...................................................................................................5-20 5.6 ELEVATED CROSSING.............................................................................................5-21 5.7 PIPE ENCASEMENT .................................................................................................5-22 5.8 THRUST RESTRAINT................................................................................................5-28 5.9 TRENCHLESS TECHNOLOGY ..................................................................................5-34 TABLE OCF ONTENTS TOC-4 O,CTOBER 2011 DWU WATER AND WASTEWATER PROCEDURES AND DESIGN MANUAL LIST OF APPENDIX TOC APPENDIX A: DWU SUE LEVEL B REQUIREMENTS APPENDIX B: DWU SUE LEVEL A REQUIREMENTS APPENDIX C: DWU TOPOGRAPHIC SURVEY REQUIREMENTS APPENDIX D: DWU BOUNDARY SURVEY REQUIREMENTS APPENDIX E: GENERAL NOTES FOR TYPICAL WATER/WASTEWATER MAIN CAPITAL IMPROVEMENT PROJECT APPENDIX F: GENERAL NOTES FOR TYPICAL WATER/WASTEWATER MAIN JOINT CONTRACT TABLE OCF ONTENTS TOC-5 O,CTOBER 2011 DWU WATER AND WASTEWATER PROCEDURES AND DESIGN MANUAL LIST OF TABLES TOC Table 1.8.3 Minimum Easement Width Table 1.9.3.2 Evaluating Project Proximity to Environmental Point of Interest Table 2.2.4 DWU Water Distribution System Table 2.3 Water Main Replacement Criteria Table 2.4.1 DWU Water Main Classification Table 2.4.3.1 Water Design Flow Estimation with Limited Available Data Table 2.4.3.2 Water Design Flow Estimation