Design and Construction Standards - Tualatin Valley Water District

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Water System Design and Construction StandardsTable of ContentsBF201 Double Check Detector Assembly - Customer Owned (Above Ground) 3" - 10"BF202Reduced Pressure Detector Backflow Assembly 2-1/2” – 10” Customer Owned(Above Ground)BF203Reduced Pressure Detector Backflow Assembly 2-1/2” – 10” Customer Owned(Above Ground) In VaultBF300Reduced Pressure Backflow Assembly 2-1/2” – 10” Customer Owned (AboveGround)BF3011" Reduced Pressure Backflow PreventerBF3021-1/2" & 2" Reduced Pressure Backflow DeviceBF303Reduced Pressure Backflow Assembly Customer Owned (Above Ground) In VaultBF304Reduced Pressure Backflow Assembly Discharge RatesBF500Minimum Protection for Filling Tanker TrucksBF501Air GapTVWD Water System Standards June 2012 Page vi
Water System Design and Construction StandardsTable of ContentsDefinitions, Acronyms, and AbbreviationsDefinitionsContractorDeveloperDistrictDistrict EngineerInspectorOwnerProject EngineerStandard DetailsStandardsAcronymsNote:ANSIASTMAWWANSFODOTULAbbreviationsThe person or entity employed by the Developer, Owner, or District in order toimplement water system improvements.The person or entity legally responsible for the development of land.The Tualatin Valley Water District.The District’s Chief Engineer, or his/her authorized representative.The person employed by the District to observe construction and enforce theDistrict’s Water System Standards and proper construction of water systemimprovements.The person or entity who possesses legal ownership of the land affected by theimprovements.The engineer in responsible charge of designing the water system improvements,who must be registered in the State of Oregon.Detail drawings showing specific installation details for water systemcomponents.The Tualatin Valley Water District Water System Design and ConstructionStandards.When references to the following capitalized abbreviations are made, they refer toSpecifications, Standards or Methods of the respective association or agency.American National Standards InstituteAmerican Society for Testing and MaterialsAmerican Water Works AssociationNSF International (formerly National Sanitation Foundation)Oregon Department of TransportationUnderwriter's Laboratories, Inc.BCR Beginning of Curb Return G.I. Galvanized IronB.F.V. Butterfly Valve G.V. Gate ValveB.O. Blowoff M.J. Mechanical Joint (fitting)CARV Combination Air/Vacuum Release Valve P.E. Plain End (pipe)D.I. Ductile Iron (pipe) ppm Parts Per MillionECR End of Curb Return PSI Pounds Per Square Inch (pressure)Flg. Flange (fitting) PRV Pressure Reducing Valvefps Feet Per Second PUE Public Utility EasementTVWD Water System Standards June 2012 Page vii
Page 1 and 2: Design andConstruction StandardsDel
Page 3 and 4: Table of ContentsList of TablesList
Page 5 and 6: Water System Design and Constructio
Page 7: Water System Design and Constructio
Page 19 and 20: Trench Excavation and Backfill Sect
Page 21 and 22: Trench Excavation and Backfill Sect
Page 23 and 24: Water Mains Section 3Section 3Water
Page 25 and 26: Water Mains Section 33.2 Materials3
Page 27 and 28: Water Mains Section 3ii.iii.f. Flan
Page 29 and 30: Water Mains Section 33. Casing seal
Page 31 and 32: Water Mains Section 3ii.iii.c. Tapp
Page 33 and 34: Water Mains Section 3v. Measure the
Page 35 and 36: Water Mains Section 35. Operate all
Page 37 and 38: Valves and Valve Boxes Section 44.2
Page 39 and 40: Valves and Valve Boxes Section 44.
Page 41 and 42: Fire Hydrants Section 5Section 5Fir
Page 43 and 44: Water Service Connections Section 6
Page 49 and 50: Precast Concrete Vaults Section 74.
Page 51 and 52: Section 8Backflow Prevention Genera
Page 53 and 54: Backflow Prevention General Require
Page 59:
Standard DetailsTVWD Water System S
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Design and Construction Standards - Tualatin Valley Water District

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