DWU WATER AND WASTEWATER PROCEDURES AND DESIGN MANUAL WWAATTEERR AANNDD WWAASSTTEEWWAATTEERR PPRROOCCEEDDUURREESS AANNDD DDEESSIIGGNN MMAANNUUAALL OOCCTTOOBBEERR,, 22001155 DWU WATER AND WASTEWATER PROCEDURES AND DESIGN MANUAL Document Number: DWU-PRO-016-ENG Revision Number: 2 TOC Approved By: Chad Kopecki Effective Date: 9/17/2015 Description of Last Revision of Pipe Specifications Change: Document Title: Water and Wastewater Procedures and Design Manual TABLE OF CONTENTS PREFACE P.1 ACKNOWLEDGEMENTS ...........................................................................................i P.2 INTRODUCTION .......................................................................................................iii P.3 ABBREVIATIONS .....................................................................................................v P.4 ENGINEERING CONVERSIONS ................................................................................vi 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 TABLE OF CONTENTS TOC-1 OCTOBER, 2015 DWU WATER AND WASTEWATER PROCEDURES AND DESIGN MANUAL 1.15 PROJECT CONSTRUCTION………….. ....................................................................1-30 TOC 1.16 RECORD DRAWING AND ARCHIVE………….. .......................................................1-30 CHAPTER 2 WATER MAIN DESIGN 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 TO EXISTING MAINS .......................................................................2-35 2.12 DEADEND MAINS ....................................................................................................2-38 2.13 WATER SERVICES ...................................................................................................2-39 2.14 ABANDONMENT OF WATER MAINS .......................................................................2-41 2.15 HYDROSTATIC TESTING & CHLORINATION ..........................................................2-41 CHAPTER 3 WATER APPURTENANCES AND FACILITIES DESIGN 3.1 REFERENCES ..........................................................................................................3-1 3.2 ISOLATION VALVE .................................................................................................3-1 3.3 FIRE HYDRANT ....................................................................................................3-5 3.4 FLUSH POINT ..........................................................................................................3- 9 3.5 WATER METER ......................................................................................................3-10 3.6 AIR VALVE .............................................................................................................3-29 TABLE OF CONTENTS TOC-2 OCTOBER, 2015 DWU WATER AND WASTEWATER PROCEDURES AND DESIGN MANUAL TOC 3.7 PITOT OUTLET .......................................................................................................3-31 3.8 BLOWOFF MANHOLE .............................................................................................3-33 3.9 ACCESS MANHOLE ................................................................................................3-33 3.10 BACKFLOW PREVENTION DEVICE ........................................................................3-33 3.11 HIGH/LOW VALVE .................................................................................................3-34 3.12 PRESSURE REDUCING VALVE ................................................................................3-35 3.13 CORROSION PROTECTION SYSTEM .......................................................................3-37 3.14 ABANDONMENT OF WATER APPURTENANCES ......................................................3-41 CHAPTER 4 WASTEWATER MAIN DESIGN 4.1 REFERENCES ...........................................................................................................4-1 4.2 DWU WASTEWATER INFRASTRUCTURE ...............................................................4-1 4.3 EVALUATION OF WASTEWATER MAINS FOR REPLACEMENT ..............................4-5 4.4 WASTEWATER MAIN SIZING ..................................................................................4-6 4.5 DEPTH OF COVER ...................................................................................................4-13 4.6 WASTEWATER PIPE MATERIALS AND EMBEDMENT .............................................4-14 4.7 LOCATION ...............................................................................................................4-18 4.8 HORIZONTAL ALIGNMENT .....................................................................................4-18 4.9 VERTICAL ALIGNMENT ..........................................................................................4-19 4.10 SEPARATION DISTANCE BETWEEN WASTEWATER & WATER MAINS .................4-19 4.11 CONNECTIONS TO EXISTING MAINS ......................................................................4-25 4.12 WASTEWATER SERVICE LATERAL ........................................................................4-25 4.13 ABANDONMENT OF WASTEWATER MAINS ............................................................4-27 TABLE OF CONTENTS TOC-3 OCTOBER, 2015 DWU WATER AND WASTEWATER PROCEDURES AND DESIGN MANUAL CHAPTER 5 TOC WASTEWATER APPURTENANCES AND FACILITIES 5.1 REFERENCES ...........................................................................................................5-1 5.2 MANHOLE ...............................................................................................................5-1 5.3 WASTEWATER JUNCTION STRUCTURE ..................................................................5-6 5.4 WASTEWATER ACCESS DEVICE AND CLEANOUT ..................................................5-7 5.5 INVERTED SIPHON ..................................................................................................5-8 5.6 ON-SITE SEWAGE FACILITIES (OSSF) ..................................................................5-12 5.7 WASTEWATER LIFT STATION AND FORCE MAINS ................................................5-14 5.8 ABANDONMENT OF WASTEWATER APPURTENANCES ...........................................5-39 CHAPTER 6 RECLAIMED WATER MAINS AND APPURTENANCES 6.1 REFERENCES ...........................................................................................................6-1 6.2 DEFINITION .............................................................................................................6-1 6.3 DWU RECLAIMED WATER SYSTEM ......................................................................6-1 6.4 RECLAIMED WATER MAIN SIZING .......................................................................6-2 6.5 DEPTH OF COVER ...................................................................................................6-3 6.6 RECLAIMED WATER PIPE MATERIALS AND EMBEDMENT ...................................6-4 6.7 LOCATION ...............................................................................................................6-7 6.8 HORIZONTAL ALIGNMENT .....................................................................................6-7