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MATERIALANDINSTALLATIONSPECIFICATIONS

FORCONSTRUCTINGWATERMAINS

ANDSERVICESMATERIALS

______________________________________________________________________________

MATERIALS

1–DESCRIPTION

1.1General:

ThispartofthespecificationsshallgovernforallmaterialsusedintheconstructionofwaterdistributionfacilitiesunderthejurisdictionoftheLittletonWaterDepartment.Projectsthatwouldnecessarily

involvematerialsotherthanthoseincludedinthisspecificationshallbesubjecttotheapprovaloftheWaterDepartmentSuperintendent.Completespecificationscoveringallmaterialsnotincludedhereinshallbesubmittedforapproval.Anymaterialusedotherthanmaterialshereinspecifiedshallbeofthe

kindandtypenormallyusedintheconstructionofwaterdistributionfacilities.

1.1.1Allproductsincludedinthissectionshallconformtotherequirementsofthestandardspecificationsreferencedherein.

1.2ReferenceStandards:

A.ANSIA21.4/AWWAC104–CementMortarLiningForDuctileIronPipeandGrayIronPipeandFittings

forWater.

B.ANSIA21.10/AWWAC110–GrayIronandDuctileIronFittings,3”through48”,forWaterandOtherLiquids.

C.ANSIA21.11/AWWAC111–RubberGasketJointsforDuctileIronandGrayIronPressurePipeand

Fittings.

D.ANSIA21.51/AWWAC151–DuctileIronPipe.

E.ANSIB.16–CastIronPipeFlangesandFlangedFittings,Class25,125,250,and800.

F.ASTMA126–GrayIronCastingsforValves,Flanges,andPipeFittings.

G.ASTMB62–CompositionBronzeorOunceMetalCastings.

H.AWWAC502–DryBarrelFireHydrants.

I.AWWAC600–InstallationofCastIronWaterMains.

J.AWWAC150–ThicknessDesignforDuctileIronPipe.

K.AWWAC509–Resilient-SeatedGateValves.

L.AWWAC550–ProtectiveInteriorCoatingsforValvesandHydrants.

2–DUCTILEIRONWATERMAINS

2.1General-OnlypipematerialslistedinthissectionshallbeusedformainextensionsunlessspecificallyauthorizedinwritingbytheSuperintendent.

2.2DuctileIronPressurePipes:

2.2.1DuctileIronPipeshallbedesignedinaccordancewithAWWAC150andANSI

A21.51/AWWAC151,Class52andshallhavepush-onjointswherespecified.Pipeshallbedoublecement-linedwithsealcoatinsideandoutconformingtoANSIA21.4/AWWAC104.Push-onjointsandrubbergaskets.

2.2.2ThepipemanufacturershallsupplyLWDwithcertificatesofcompliancewiththese

specificationsandcertificationthateachpieceofductileironpipehasbeentestedatthefoundrywithBallImpressionTest,RingBendingorotherapprovedtestforductilityuponrequest.

2.2.3Ductileironpipemayberejectedforfailuretomeetanyoftherequirementsofthis

specification.

3–SERVICELINES(SeeAttachmentA)

3.1Description:

Theservicelineisthelinefromthemaintotheoutletvalveatthecustomer’smeter.Itshallconsistof

thecorporationstopatthemain,thetubingorpipe,thecurbstopandcurbbox,andameterwithvalvesonboththeinletandoutlet.LWDalsorequiresaPressureReducerbeinstalledpastthemeter,aswellasforallSillCockstobeequippedwithaHoseBibVacuumBreakerequaltoWatts#8.

3.1.1PolyethyleneServiceline:Tubingforservicesshallbepolyethylenedesignedfor200psiservice.PipeshallbeinaccordancewithAWWAC901standardforPolyethylenePressurePipe,

tubingandfittings.

3.1.2Forservicelineslargerthantwoinchesindiameter,anypipeapprovedinsectionforwatermainsshallbeused.

3.3.3Rejection:PBtubingmayberejectedforfailuretomeetanyoftherequirementsofthisspecification.

4–FITTINGS

4.1Description:

Allfittingsusedintheconstructionofwaterlinesshallbe“UnderwritersLaboratory”(UL)forapproved.

AllmaterialslistedinthissectionshallbemanufacturedinNORTHAMERICA.,unlessspecificallyauthorizedinwritingbytheSuperintendent.

4.2FittingsforDuctileIronPipe:

4.2.1FittingsshallbeCastIron,250psipressurerating,orDuctileIron,350psipressurerating,conformingtoANSIA21.10/AWWAC110withmechanicaljoints.CompactDuctileIronFittings

conformingtoANSIA21.53/AWWAC153willbeacceptable.Jointsshallbefurnishedwith

ductileironretainingglands.RetainingglandsshallbeROMACINDUSTRIES,INC.GRIPRING™PIPERESTRAINER,oranapprovedequal.Glandsusingsetscrewswillnotbeacceptable.Fittings

shallbedoublecement-linedandseal-coatedinsideandoutinaccordancewithANSIA21.4/AWWAC104.Teesforhydrantbranchesandforstubsforfutureuseshallhavemechanicaljointsontherunwithaplain-endhavinganintegralrotatingglandonthebranch

(Anchor-tees).Theglandwillanchormechanicaljointpipeorvalveendstotheplainendofthepipe.

4.2.2AllDuctileandCastIronPipeandfittingsshallbeclean,sound,andwithoutdefects.Thecastingsshallbesmoothandfreefrompinholes,excessiron,etc.Thecoatingsshallbe

continuous,smoothandneitherbrittlenorsticky.

4.3BrassWaterServiceFittings/ServiceBoxes:

4.3.1General-StopsandFittingsfurnishedunderthesespecificationsshallbeofthesizeandtypespecified,withallpartsofbrass,conformingtoAlloyNumber4A(ASTMDesignationB62)whichhasanominalcompositionof85%copperand5%eachoftin,lead,andzinc,plusor

minus1%.Allstops,cocks,andfittingsshallbefullsizeopenings,throughout,ofthesizespecified.

Allcastingsshallbesmooth,freefromburrs,scales,blisters,sandholes,anddefectsofeverynaturethatwouldmakethemunfitfortheuseforwhichtheyareintended.

Nutsshallbesmoothcast,withsymmetrical,hexagonalwrenchflats.

4.3.2CorporationsshallbeAWWAcorporationvalveinletthreadbycompressionfitting,

meetingtherequirementsofANSI/AWWAC800-89,Mueller25008orequivalent.Theyshallbedesignedtorotateabouttheaxisoftheflowpassagewaywithinacircleofrotationsmall

enoughtoproperlycleartheinsideofanystandardtappingmachineofappropriatesize.

4.3.3CurbStopsshallbecompressionfittingmeetingtherequirementsonANSI/AWWAC800-89.Mueller25209orequivalent.

4.3.4ServiceBoxesshallbeErieBoxPlugStylewith36”StainlessSteelRodwithstandard4.5–5.5feetboxeswithastandardplugcoverwithbrasspentagonplug.Eachboxwillbefittedwith

a36’serviceroadandtheboxshallbemanufacturedinU.S.A.

SECTION5–WATERMAINVALVES

5.1ResilientSeatedGateValves:

5.1.1ValvesshallbeResilientWedgeGateValve,WATEROUSSeries500orequivalentmeetingAWWAC509ofthelatestrevision.Allboltsshallbestainlesssteel.Valvesshallhaveanunobstructedwaterwaywhenfullyopenedequalindiametertoatleast¼”greaterthanthe

nominalvalvesizes.Valvesshallhavemechanicaljointend.ValvesusedinconjunctionwithRomacTappingSleevesshallhaveaflangeend.

5.1.2Allinternalsurfacesshallbecoatedwithepoxytoaminimumthicknessof4mils.Said

coatingshallbenon-toxic,impartnotastetowaterandshallconformtoAWWAC550oflatestrevision.

5.1.3ValvesshallbeprovidedwithtwoO-ringstemseals.BothO-ringsshallbelocatedabovethethrustcollar.Thesealingmechanismshallprovideadualsealwithzeroleakageatthewater

workingpressurewheninstalledwiththelineflowineitherdirection,andshallconsistofaductileirongatehavingavulcanizedsyntheticrubbercoatingwithnorubbermetalseamsoredgesinthewaterwaywheninthefullyclosedposition.

5.1.4AllvalvesshallbeseattestedattheratedworkingpressureinaccordancewithSection6

ofAWWAC-509.Valveshallberatedat200psiworkingpressureand400psitestpressure.

5.1.5ValvesshallOPENLEFT.

5.2TappingSleeveandValve:

5.2.1TappingsleeveshallbeRomacStainlessSteelorequivalent,meetingAWWAC223.

5.2.2Themechanicaljointsleeveshallhavelongitudinalcompoundrubbergasketswhichshall

fitagainsttherubberendgasketsthusaffectingatotallyenclosedrubberwater-tightseal.

5.2.3Tappingsleeveshallhaveaflangewith“O”ringsealanddrilledtocorrespondtothatofthetappingsleevetoinsureproperalignment.

5.3ValveBoxes:

5.3.1Valveboxesshallbestandardcast-iron,asphaltcoated,adjustable,slidingtype,together

withcast-ironcoverswiththeword“Water”plainlycastinreliefonthetopsurface.AllValveBoxesshallbemanufacturedinNorthAmerica.

5.3.2ThebottomsectionshallhaveaminimumI.D.of5-¼”.Thetopsectionshallhavea

minimumdiameterof6-⅛”.Thereshallbeaminimum6”overlapbetweensections.

5.3.3Thebottomsectionshallbe36”inlengthforallgatevalves.Thetopsectionshallbeatleast26”inlengthandhaveaplainbottom.Nothreepiececombinationsshallbeacceptable.

5.4.5Valveboxesshallbecompletelyandthoroughlycoatedwithbitumasticpaint.

6–FIREHYDRANTS

6.1General:

6.1.1Hydrants–TheLittletonWaterDepthasstandardizedontheWaterusWB-67orClowMedallion.AllHydrantswillbe“OPENLEFT”.HydrantsshallconformtotherequirementsofAWWAC-502,andbedesignedfor150psiworkingpressuretestedto300psihydrostatic

6.1.2Hydrantsshallbeabletoberotated360degrees.Theyshallhaveapositiveclosing,self-

cleaningdrainvalveanddrainageareashallbecompletelybronzeorbrasslined.

6.1.3HydrantsshallbepaintedyellowtomatchtheTown’sstandardcolor.Inaddition,twocolumnswillbeinstalledtoprotecthydrantsfromvehiculartrafficandsnowplows.Columnsshallbepaintedyellowtomatchhydrants.

6.1.4HydrantExtension–MUSTBEapprovedbyLWD,andshallbeprovidedbythesame

manufacturerashydrants.Extensionshallincludebarrel,rod,coupling,bolts,gaskets,andallotheraccessoryequipmentforacompleteinstallation.

SECTION7–METERS

7.1Description:

Thissectioncoverswatermeters⅝inchto2inches.Aspecialdetailwillbesubmittedforapprovalformeterslargerthantwoinches.

7.2MetersmustconformtoAWWAStandardC-700,latestedition.

7.3AsofSeptember1,2003,LWDwillcharge$300.00fora¾”and$360.00fora1”metersetupfornewinstallations.Theownershallprovideashut-offvalveadjacenttoandonthehousesideofthe

meter.Watermustbeshutofffromthemeterincoldweatherorthemeterotherwiseprotectedfromfrost.Anypersonallowingtheirmetertobedamagedbyfrostorotherwisewillbeheldresponsibleforthecostofmakinggoodthesame.Formetersizesoneandone-halfinch(1½”)orgreater,itisthe

responsibilityoftheowner/customertosupplysaidmeterandshut-off,inaccordancewithLWDSpecifications.Allmeterslargerthan1”shallbeapprovedbyLWD.

7.4.LWDrequiresapressurereduceronthehousesideofthemeterbeinstalledbyalicensedplumberpriortofinalsignoff.

8–THRUSTBLOCKS

8.1Blocks–ThrustblocksshallbeSolidPrecastConcreteBlockplacedbetweenbackoffittingandtrenchwall,inamannertopreventblowoffofthefitting.

8.2Rodding–Inareaswherethrustblocksareunabletobeusedtoproperlyrestrainthefittings,

threadedrodsshallbeusedtoanchortheconnectiontothemain.

SECTION9–PIPEBEDDINGANDBACKFILL

9.1Bedding:

9.1.1Beddingsandshallbeusedforductileorplasticpipe.Sandshallbefreeofstones.Aminimum8”–12”ofbeddingsandshallbelaidbeneaththepipe,andextend18”overthepipe.Beddingsandshallbeextendtothewidthofthetrench.

9.2Backfill:

9.2.1Backfillingshallbedonewithgoodearth,sandorgravelandshallbefreefromlargerocks

orhardlumpymaterial,unlesstherocksorlumpsarenotmorethanapproximatelyfour(4)inchesingreatestdiameterandarescatteredinthesoil.Nomaterialofaperishable,spongy,orotherwiseunsuitablenatureshallbeusedinbackfilling.

SECTION10–METERBOXES

10.1MeterBoxesfor⅝Inchand1InchMeters:

Meterboxesfor⅝inchthru1”inchmetersshallbeasdepictedbelow.DimensionsofmeterboxandlidareintheStandarddetails.

Meterboxlidsshallbecastironasperstandarddetails.SEEBELOW

10.2MeterBoxesforMetersLargerthan1Inch:

MeterboxesshallbeQualityWaterProduct1.5”–2”MeterPitorequal.

10.3MeterBoxesforMetersLargerthan2Inch:

Meterboxesshallbemadeofconcreteblocks,bricksorpouredconcretefourinchesthickorgreater.Concreteshallbe3000lb.minimumat28days.

Coversforthesemeterboxesshallbemadeofsteelasperdesignandplans.Thesteelshallbestrongenoughtohandlethetrafficload(ifany).

Thewallsofthemeterboxesshallbecoatedwithabituminoussealantinsideandoutside.The

steellidsshallbebituminouscoatedtopreventrust.Lidsshallbeasperspecialstandarddetails.

SECTION11–TRACEWIRE

11.1Tracewireshallbelaidwithallnon-metallicpipeasperstandarddetails.

Traceshallbefourteen(14)gaugesinglestrandplasticcoatedcoppertracewire.

CONSTRUCTIONOFWATERMAINS

SECTION1–GENERAL

1.1Thispartofthespecificationshallgoverntheconstructionproceduresusedintheinstallationof

waterlinefacilitiesunderthejurisdictionoftheLittletonWaterDept.ConstructionproceduresotherthanthoseoutlinedinthisspecificationshallmeetwiththeapprovaloftheUtility.Completespecificationscoveringanyunusualorspecialconstructionprocedureshallbesubmittedforapproval

andapprovalmustbereceivedpriortobeginninganyconstructionoperations.

SECTION2–EXCAVATIONANDBACKFILL

2.1Description:

Thissectioncoverstheexcavationandbackfillofwaterlines,andappurtenances.

2.2TrenchExcavation:

2.2.1Thesidesoftheexcavationshallbecutassuchaslopethatwillpreventcaving.Inareas

wheresoilconditionspermitnormalexcavationofthetrench,thesidesshallbecutasnearlyverticalaspossiblefromthebottomofthetrenchtoapoint12”abovethetopofthepipewhenitislaidtograde.Maximumandminimumwidthsofthetrenchshallbeasshownintheplans.

2.2.2Incavinggroundorinwet,saturated,orflowingmaterials,thesidesoftheexcavationshall

beadequatelysheetedandbracedsoastomaintaintheexcavationfreefromslidesorcave-insandsafeforworkmen.Sheetingandshoringshallnotberemoveduntiltheexcavationhasbeenbackfilledtoasufficientdepthtopreventcaving.

2.3TrenchBottom:

TheentirelengthofthewaterlineshallbefoundedonbeddingspecifiedinPipeBeddingand

BackfillMaterials.

2.4DisposalofExcavatedMaterials:

Excavatedmaterialshallbepiledadjacenttotheworktobeusedforbackfillingasrequired.Excavatedmaterialswhichareunsuitableforbackfillingandexcessmaterialshallbedisposedlegallydisposedofatcontractor’sexpense.

2.5UseofExplosives:

Intheeventtheuseofexplosivesisnecessaryfortheefficientprosecutionofthework,theContractor

shallnotifytheSuperintendentinadvanceoftheiruseandshallexerciseeveryprecautiontopreventdamagetoadjoiningimprovementsorpropertybyreasonoftheiruse.Anydamagetoprivateproperty

resultingfromtheuseofexplosivesshallbetheliabilityoftheContractor.Inallcaseswheretheexplosivesarenecessary,apermitfromthelocalgovernmentagencyshallbeobtainedpriortotheir

use.

2.6Backfilling:

2.6.1WaterLines:

2.6.1.1Backfillingofwaterlinesshallincludetherefillingandconsolidationofthefillintheexcavationuptothesurroundinggroundsurfaceorroadgradeatcrossings.Itisessentialthatthecompletebackfillbedoneinsuchamannertominimizevoidsinthe

backfill.

2.6.1.2Backfillinguptothepoint12”abovethetopofthepipeshallbedonewithgoodearth,sand,orgravelandshallbefreefromlargerocksorhard,lumpymaterials.Nomaterialsofperishable,spongyorotherwiseunsuitablenatureshallbeusedin

backfilling.

2.6.1.3BackfillofPipe:

Rigidpipe(concrete,castiron,orasbestoscement)shallbebackfilledwithselectmaterialsofthepropermoisturecontenttoobtainasupportunderthelower½ofthepipe,compactedtoadensityof90%AASHTOT-180modifiedorbetter.Theintentisto

cradlethepipesothatthefilllengthofeachjointisuniformlysupportedonfirmbeddingandtheweightofpipeandfillisborneuniformlybythelower½ofthepipebarrel.Tampingoffillbelowthespringlineofthepipemaybebyhandtampsprovided

therequireddensityisobtained.

Wheretrenchesarenotunderexistingorproposedpavedareas,backfillshallproceedwiththesameselectmaterialshandplacedtoapoint12”overthetopofthepipe.

Backfillmaythenproceedbywhatevercommonlyusedconstructionmethodsasareconsistentwiththeintegrityofthepipeline.Backfilloutsidetheexistingorproposedpavedareasshallbeleftslightlyoverfulltoallowforsettlement.

Wheretrenchesareunderexistingorproposedpaveareas,theentiretrenchuptoa

point2’belowexistingorproposedsubgradeshallbebackfilledwithselectmaterialsandcompactedtoadensityof90%AASHTOT-180modifiedorbetter.Theremaining2’shallbesimilarlybackfilled,buttheminimumcompactionshallbe95%AASHTOT-180

modified.

Thebackfillofmaterialsintrenchesunderexistingorproposedpavedareasshallbecompactedwithmechanicaldevicesmanufacturedforthatpurposeformtwofeetabovethetopofthepipetothetopoftheexistingorproposedsubgrade

SECTION3–DEWATERINGOFTRENCHES

3.1Description:

Thissectioncoversthedewateringoftrenchestotheextentthatbeddingmaterialandwaterpipecanbeplacedondry,firmtrenchbottom.

3.2Wellpointing:

Wellpointingwhererequiredtokeeptheexcavationdryandthesubgradestable,shallbeinstalledwhentheexcavationiswithinaminimumoftwo(2)feetofthewatertable,exceptashereinafterprovided,

andshallbeincontinuousoperationuntilbackfilliscompletedtothislevel.Whenconstructionequipmentistobeoperatedinanareathathasbeenexcavatedandwellpointingisrequiredtokeeptrenchexcavationdryandthesubgradestable,thewellpointshallbeinstalledwhentheexcavationis

withinaminimumoffive(5)feetofthewatertable.Thereshallbesufficientpumpingequipment,ingoodworkingorder,availableatalltimes,toremoveanywaterthataccumulateswhenthepipelinecrossesnaturaldrainagechannels,theworkshallbeconductedinsuchamannerthatunnecessary

damageordelaysintheprosecutionoftheworkshallbeprevented.Provisionshallbemadeforthesatisfactorydisposalofsurfacewaterpumpedsoastopreventdamagetopublicorprivateproperty.

3.3TrenchDewatering:

DewateringoftrenchesotherthanbywellpointingshallbeaccomplishedbywhatevermeanselectedbytheContractor,however,beddingmaterialorpipemaynotbeplacedinwetorunstabletrenches.Soil

thatcannotbeproperlydewateredshallbeexcavatedanddrymaterialtampedinplacetosuchadepthasmayberequiredtoprovideafirmtrenchbottom.

3.4SurfaceRunoff:

Surfacerunoffwatershallbedivertedawayfromthetrenches.Suchdiversionshallbeintoexistingdrainagestructuressuchasstormsewers,ditchesorstreams.Diversionofsurfacerunoffshallbeinsuch

amannertopreventfloodingofstreetsorprivateproperty.

3.5DispositionofWaterfromDewatering:

Allwaterremovedfromthetrenchesbywellpointingoranyothermeansshallbepumped,pipedordrainedintoexistingdrainagestructures,suchasstormsewers,ditchesorstreams.Thedispositionofwaterfromdewateringoperationsshallbeaccomplishedinamannerthatwillpreventthefloodingof

publicorprivateproperty.

SECTION4–SHEETINGANDSHORING

4.1Description:

Thissectioncoversthesheetingandshoringtoprotectthesafetyofworkers,providesuitablemeansfor

constructingthewaterline,andtoprotectpublicorprivateproperty,includingexistingutilities.

4.2Cave-ins:

Wheretrenchcave-insareapossibility,adequatesheetingand/orshoringshallbeprovidedsoastomaintainthetrenchfreefromslidesorcave-insandsafeforworkmen.

4.3ExistingStructures:

Whereexistingbuildings,otherutilities,streets,orotherstructuresareincloseproximitytothetrench,

adequateprotectionshallbeprovidedbytheuseofsheetingandshoringtoprotectthestructurefrompossibledamage.

Inthecaseofstreetsorutilities,theContractormayelecttoremovethestreetorutilityprovidedthattheremovalandsubsequentreplacementmeetswiththeapprovaloftheTownofLittleton,theutility

owner,orwhoeverhasjurisdictionofthestructure.Inallcases,itshallbetheresponsibilityoftheContractortoprotectpublicandprivatepropertyandanypersonorpersonwhomight,asaresultoftheContractor’swork,beinjured.

SECTION5–PIPELAYING

5.1Description:Thissectioncoversthelayingofpipeforwaterlines.

Eachjointofpipeshallbeinspectedcarefullybeforebeingplacedinthetrench.Anyjointfoundtobecrackedorotherwisesodamagedastoimpairitsusefulnessshallbeplainlymarkedinsuchamanner

thatthemarkingswillnotruborwashoff.Damagedjointsshallberemovedfromthesiteassoonasfeasible.

5.2PipeLaying:

5.2.1Allpipeandfittingsshallbeinstalledtothelineandgradeasdetailedontheplans.SubjecttotheapprovaloftheEngineer,otherfittingsmaybeaddedtoorsubstitutedforthoseshown

ontheplans,shouldtheneedariseduringconstruction.ThispermissivestipulationinnowayshallrelievetheContractoroftheresponsibilityforfurnishingandinstallingallfittingsrequiredforacompleteandproperinstallationofmainasdetailedontheplans.

• Properfacilitiesshallbeprovidedforloweringsectionsofpipeintotrenches.Underno

circumstancesshallpipebelaidinwaterandnopipeshallbelaidwhentrenchconditionsorweatherareunsuitableforsuchwork.Fullresponsibilityforthediversionofdrainageandfordewateringoftrenchesduringconstructionshallbebornebythe

Contractor.• Alldirtandotherforeignmattershallberemovedfromtheinsideofpipeandfittings

beforetheyareloweredintothetrench.Theyshallbekeptcleanduringandafter

laying,careshallbetakentokeepdirtoutofthejointingspace.• Spigotandbellsshallbecleanedthoroughlybeforetheapplicationoflubricantand

attachmentofthegasketshallbeinstrictaccordwiththejoint.

• Allfittingsshallbetightenedusingtorquewrenchestothemanufacturer’sspecifications.

• Attheendofeachday’swork,andwhenpipelayingisdiscontinuedforanappreciableperiod,openendsofpipeshallbeclosedwithacastplugorcapfirmlysecuredinplace.

• Allpipeandfittingsshallbeloweredcarefullyintothetrenchinsuchmannerasto

preventdamagetopipe,fittings,orlinings.Neitherpipenorfittingsshallbedroppedordumpedintothetrench.

• Cuttingofpipe,whereneeded,shallbedoneinaneatandworkmanlikemanner

withoutdamagetopipeorpipelining.• Deflectionsshallnotexceedthemaximumrecommendedbythepipemanufacturer.• Allnon-metallicpipesshallhavetracewiremeetingrequirementsofSectionMW12,

“TraceWire”ofthesespecificationsasperstandarddetails.• Backfillingshallnotbeundertakenuntilwatermaininstallationhasbeeninspectedand

approvedbyLWD.

5.3EarlyWarningTape:

Earlywarningtapeorwireshallbeinstalledintrenchontopofpipebeddingsand.

SECTION6–TAPS

6.1ServiceTaps:

6.1.1General:

Taps:Tapsfortransmissionofwaterorairfromthemainintosystemserviceaccessoriesaredefinedasfollows:

a.Standardinternalpipethreadedholesinthewallofwatermains;thesetapsmaybeeither

manufacturedintothepipeorinstalledinthefield.

b.Tapinstallationsthataremadebyclampingabronzeserviceclampequippedwithasealedthreadedportontheperipheryofthemainthendrillingthroughthepipewalltocompleteeachserviceport.

c.Whenadirecttapismade,pipedopeorTeflontapeshallbeappliedtothethreadedpartof

thecorporationstop.

d.Serviceswillonlybeprovidedfromdedicatedeasements,alleyadright-of-ways.

e.Tapswillbelocatedinsuchamannertoprovidetheshortestdistanceandmostdirectlinetothemeter.

f.Effortshouldbemadetoallowforthecorporationtobesetateither10o’clockor2o’clock.

6.1.2TappingAsbestos-CementPipe:

Asbestos-cementpipeshallbetappedbytheuseofatappingsaddlewithdoublestainlesssteelstraps.

6.1.3TappingCastIronPipe:

Castironpipefour(4)inchesindiameterandsmallershallbetappedbytheuseofatapping

saddlemadeofbronzeorstainless

6.1.4TappingDuctileIronPipe:

DuctileIronPipeshallbetappedthesameascastironpipe,SectionCW8.1.3above.

6.1.5TappingPVCPipe:

PVCpipeshallbetappedthesameascastironpipe,SectionCW8.1.3above.

6.1.6TappingConcretePressurePipe:

ConcretepressurepipeshallbetappedbytheuseofabronzeorstainlesssteeltappingsaddleasinCW8.1.1.babove.TapshallbemadeaccordingtoPipeManufacturer’sspecifications.Aftertapismade,tapshallbecoveredwithmortarconformingtoMW13.1“Mortar”ofthese

specifications.

6.2MainTaps:

6.2.1WetTaps:

WetconnectionsshallbeusedforallconnectionsexceptwheredirectedbytheEngineer.WetconnectionsshallbemadewithatappingsleeveandvalveconformingtoMW5.3“TappingValvesandSleeves”ofthesespecifications.Eitherairdrivenormanualtappingmachinesmayb

used.Thepipetobetappedshallbecleanedthoroughlyandwirebrushedtoremoverustandotherforeignmatter.Thetappingsleeveshallbeputonandtighteneddownsecurely.Thevalveshallbeputonthesleeveandbracedagainstmovement.Thenthetapshallbemade.

6.2.2DryTaps:

DryconnectionsshallonlybemadewhendirectedbytheEngineerand/orwhenafittingmustbeaddedtoanexistingline.Fordryconnections,theexistinglinemustbeshutoffanddrained.Thisshouldbedonesothatdowntimeofthelineshallbeasshortaspossible.Afterlinehas

beendrained,thelineshallbecutandthefittingputinandblocked.Thesectionolinecutintoshallbetestedandsterilizedaswouldanewline.

SECTION7–HYDRANTS

7.1Description:

Thissectioncoversconstructionmethodsusedinsettingfirehydrants.AllfirehydrantsshallconformtoSectionMW6–“FireHydrants”.

7.2Excavation:

Excavationforfirehydrantsshallbeneatandshallleavebackoftrenchandbottomoftrenchundisturbedearthforconcreteblocking.

7.3Installation:

Firehydrantsshallbeinstalledasperstandarddetails.Astandardsix-inchgatevalveshallbebetween

themainandhydrant,asperstandarddetails.Six(6)inchDuctileironwaterline,meetingrequirementsMW2.2–“DuctileIronPressurePipe”ofthesespecifications,orSwivaladaptersshallbeusedtoinstallfirehydrants.

7.4Backfill:

Backfillshallbeasperstandarddetails.Concretelockingshallbeputunderneathandbehindhydrant.At

leastseven(7)cubicfeetofcrushedstone,average¾inchdiameter,shallbeplacedaroundhydrantasperstandarddetailsfordrainageofhydrantbarrel.Fabricshallbeplacedabovestonetoprovideaseparationbarrierbetweenbackfillandstone.

SECTION8–PAVEMENTREPAIRS

8.1Description:

Thissectioncoverstheconstructionmethodstobeusedintherepairofroads,streets,orotherpublicrights-of-way.

8.2PermanentRepairs:

8.2.1Asphaltconcretehotmixsurfacecourseconstructionshallmeetwiththecurrent

requirementsoftheLittletonHighwayDepartmentSpecificationsortheMassDOTSpecificationsfortheconstructionofasphaltconcretehotmixsurfacecourseorasotherwiseapproved.

8.2.2ConcretepavementrepairsshallmeetwiththecurrentrequirementsoftheMassDOT

SpecificationsortheLittletonHighwayDepartmentSpecificationsfortheconstructionofconcreterigidpavements.

8.2.3GravelsurfacingshallmeetwiththecurrentrequirementsoftheLittletonHighwayDepartment

8.2.4Allpermanentrepairsofstreets,roads,orotherpublicrights-of-wayshallmeetwiththeconstructionrequirementsofthegoverningagencyorprivateownerandshallmeetwiththe

requirementsofalllocalOrdinances,Regulations,Permits,orCodesgoverningtherepairstoroads,streets,orotherrights-of-way.

8.3TemporarySurfacing:

MethodsoftemporarysurfacingshallmeetwiththerequirementsofParagraph14.2orasotherwiseapprovedtoadequatelymaintaintrafficandproperdrainage.

SECTION9–CONSTRUCTIONWITHINCITYRIGHT-OF-WAY

9.1CityStreets:

LittletonHighwayDepartmentandMassDOT(whenapplicable)shallbenotifiedpriortoanystreetcuts.Properpermittingshallbeobtainedpriortoopeningofanycitystreets

Ifcitystreetshavetobeclosed,theLittletonFire,PoliceandHighwaydepartmentshallbenotifiedof

closing.Properbarricades,warningsigns,lightsandwatchmenshallbeemployed.Workshallbeprosecutedinsuchamannerthatone-halfofthetraveledportionoftheroadisopentotrafficunlessapprovedbyLittletonPoliceDept.inwriting.

Right-of-wayshallbeleftinaneatandorderlymannerandleftinasgoodorbettershapethanitwas

beforeconstruction.

9.2Easements:

Easementsshallbeleftinaneatandorderlymanner.Easementsshallbeleftinasgoodorbettershapethanthatbeforeconstruction.

SECTION10–EXISTINGSTRUCTURES

10.1General:

NotreesorexistingstructuresshallberemovedunlessapprovedbytheSuperintendent.Allexistingstructures,improvements,andutilitiesshallbeadequatelyprotected,attheexpenseoftheContractor,fromdamagethatmightotherwiseoccurduetoconstructionoperations.TheContractorshallbeliable

fordamagetoanyutilitiesresultingfromhisoperation.Duringconstruction,allfirehydrants,valveboxes,fireorpolicecallboxes,andotherexistingutilitycontrolsshallbeleftintact,unobstructedandaccessible.

SECTION11–STERILIZATION

11.1Description:

Thissectioncoversmethodsforsterilizationofwaterlinesandfacilities.BeforewaterlinesaresterilizedtheymustfirstbepressuretestedaccordingtotherequirementsofPartTW–“TestingofWaterMains”ofthesespecifications.Waterlinesalsomustbeflushedtoremovedirtandotherforeignmatter.

11.2Flushing:

Aservicetapmustbeputononeendofthewaterlinetoallowentryofflushingwaterandsterilization

water.ThetapshallbedoneaccordingtotherequirementsofCW8–“ServiceTaps”ofthesespecifications.

FlushingshallbedonewithcleanwaterfromtheTown’ssystemuntilwaterleavingtheotherendofthemainisclear.

11.3Sterilization:

Chlorineshallbeusedtosterilizethepipelinebythefollowingmethod:

Theamountofchlorineappliedshallbesuchastoprovideadosageofnotlessthanfifty(50)partsper

million.ThechlorinatingmaterialshallbeintroducedtothewaterlinesanddistributionsysteminamannerapprovedbytheEngineer.Afteracontactperiodofnotlessthaneight(8)hours,thesystemshallbeflushedwithcleanwateruntiltheresidualchlorinecontentisnotgreaterthan0.2partsper

million.Allvalvesinthelinesbeingsterilizedshallbeopenedandclosedseveraltimesduringthecontactperiod.

Thecostoffurnishingthechlorine,labor,tools,equipment,andtestsofchlorinecontentandbacteriologicaltestswillbeattheexpenseoftheContractor.Nowatermainsshallbeplacedinservice

untilasatisfactorytestreporthasbeenreceivedfromanapprovedlaboratory.

TESTINGOFWATERMAINSECTION

SECTION1–GENERAL

1.1Thispartofthespecificationsstipulatestestrequirementsformaterials,constructionmethods,and

leakage,pressureandbacteriologicaltestsofthewaterlines.TestingformaterialsandconstructionmethodsshallbeattheDeveloper’soptionexceptasstipulatedherein.TheLittletonWaterDepartmentmayrequiretestsasoutlinedinthesespecificationsformaterialsandconstructionproceduresif,inthe

opinionoftheWaterDepartment,thequalityofmaterialsandtheconstructionproceduresdonotmeettherequirementsstipulatedherein.

Inallcases,leakage,pressureandbacteriologicaltestsshallbeperformedonwaterlinesasspecifiedinthesestandardspecifications.

SECTION2–HYDROSTATICTESTING

2.1DuctileIronPipe:

Assoonasacontinuoussectionofnewwatermainhasbeeninstalled,theContractorshallproceedimmediatelytocompletealltestingandsterilizing,makeallconnections,andplacethosesectionsin

service.TheContractorshallfurnishalllabor,materials,tools,andequipmentnecessarytobulkheadandsealoffthelinefortesting,coordinatewiththeLittletonWaterDept.toflush&fillthenewlyconstructedmainwithwater.

Unlessotherwiseindicated,thepipelineshallbetestedwithahydrostaticpressureofnotlessthantwo

hundred(200)poundspersquareinchmaintainedoveracontinuousperiodofnotlessthantwo(2)hoursbyanindependentthirdpartycontractorwhoperformswatermainpressuretestingonaregularbasis.Afterasuccessfulcontinuouspressureperiodoftwo(2)hourshasbeencompleted,the

contractorshallchlorinate(seesection11–Sterlilization)thewatermainusingathirdpartycontractor.

Thecostoftesting,finding,andrepairingtheleaksandretesting,shallbeattheexpenseoftheContractor.ThewaterrequiredtofillthelineswillbefurnishedbytheOwner,withoutchargetotheContractor.

2.2PVCPressurePipe:

Assoonasacontinuoussectionofnewwatermainhasbeeninstalled,theContractorshallproceed

immediatelytocompletealltestingandsterilizing,makeallconnections,andplacethosesectionsinservice.TheContractorshallfurnishalllabor,materials,tools,andequipmentnecessarytobulkheadandsealoffthelinefortesting,fillitwithwater,raisethefilledlinetotestpressure,andmeasurethe

amountofleakageoverthetestperiod.Unlessotherwiseindicated,thepipelineshallbetestedwithahydrostaticpressureofnotlessthanthatpressurethepipeisratedat(i.e.,class200testpressure200

psi)maintainedoveracontinuousperiodofnotlessthanfour(4)hours.Afterasuccessfulcontinuouspressureperiodoffour(4)hourshasbeencompleted,atestforthedeterminationofamountofleakage

shallberunatthesamepressureasbeforeforadurationoftwo(2)hours.Ifthetestsindicatealeakageinexcessofarateequaltoten(10)gallonsperinchofinternalpipediameterpermileofpipelinepertwenty-four(24)hours,theContractorwillberequiredtofindandeliminatetheleak.Allknownleaks

shallbestopped,regardlessofthetestrequirement.

Thecostoftesting,findingandrepairingtheleaksandretesting,shallbeattheexpenseoftheContractor.ThewaterrequiredtofillthelineswillbefurnishedbytheOwner,withoutchargetotheContractor.

SECTION3–BACTERIOLOGICALTEST

3.1AfterasectionofwatermainhasbeensterilizedandflushedaccordingtoSectionCW19–“Sterilization”ofthesespecifications,theUtilityshallbenotifiedtopickupasample.Abacteriologicaltestshallberuntodeterminewhethercoliformorganismsarepresent.Ifcoliformorganismsarefound

thelinewillhavetoberesterilizedasperSection11.3ofthesespecifications.

TheContractorwillbenotifiedastotheresultsofthetest.Thetestrequires48hourstocomplete.

ASBUILTDRAWINGS

SECTION1–GENERAL

1.1ThispartofthespecificationsstipulatestestrequirementsfortheprovisionofASBUILTdrawingsofworktobeprovidedtotheLittletonWaterDept.AllcostsassociatedwithprovidingaccurateASBUILTdrawingstoLWDshallbetheresponsibilityofthecontractor.

SECTION2–SERVICEASBUILT

2.1Atthecompletionoftheinstallation,andpriortoawatermeterbeinginstalled,thecontractorshallprovidetoLittletonWaterDeptanASBUILTdrawingdepictingthefollowing:

• CurbStop• WaterLinewithDesignationastothesize.

• Locationwheretheserviceentersthebuilding

AllASBUILTDrawingsshallhaveaminimumoftwo(2)tiesfrompermanentstructures(i.e.buildingcorner,hydrant,gatecover,manholecover,catchbasin,hydrant,propertybound).

SECTION3–WATERMAINASBUILT

3.1As-BuiltDrawings–WaterInfrastructure

As-BuiltDrawingsshallbeinaccordancewiththestandardsestablishedbyLWDandshallshowcompletedetailsoftheinstallationoftheMainandappurtenancesasrequired,including,butnot

limitedto,

1)ThelocationoftheMainwithrespecttopropertylines,

2)Thesize,make,andlocationwithrespecttostreetcornersofallvalvesandfirehydrants,manholes,andcleanouts,

3)Thelimitsandlocationofanyandallspecialencasementsorbackfillmaterialsincludingaveragedepthofcoveratsuchlocation,

4)Adetaileddiagramofallspecialinstallationsatutility,drainage,androadwaycrossings,

5)Locationofotherutilitiesencountered.

6)Flowlineandrimelevationforallmanholes.

7)Sizeandmaterialofmain,

8)Locationandsizeofeasements.

TheApplicantshallprovidetheWaterDepartmentwithafullsize,reduced,anddigitalcopyofthe

finalsetofAs-builtplanspriortowaterserviceacceptance.

3.1.1Thedigitalcopyofapprovedas-builtplansmustfollowthefiverequirementslistedbelow:

1.Allplansandspecificationsmustbesubmittedonelectronicmedia(CDorDVD_ROMusinganIBM-PCorcompatiblefileformat).Acceptablefileformatsinclude:AutoCAD*.dwg,AutoCAD*.dxf,ArcView*.shp,orArcGISGeodatabase*.mdb.Thefilesmustbe

identicaltotheprintedplanandcontainallinformationincludedonthewrittenplan.

2.AlldigitalmappingdatamustbedeliveredintheMassachusettsStatePlaneCoordinatesystemwithahorizontaldatumofNAD83andverticaldatumofNGVD88.

3.EachfeaturetypemustbeorganizedintheCADorGISdatastructureasaseparate

layerusinglogicallayernames.Forexample,theremustbeseparateCADlayersforbuildings,roads,parcellines,andwetlands.HavingallthesefeaturesinasingleCADlayerorGISfilewillnotbeaccepted.

4.DocumentationofthedataformatmustbeprovidedwithadescriptionoftheCAD

layersandlistofthetypesoffeaturesplacedineachlayer.Submissionofmultiplefilesmustalsoincludealistofthefilesandtheirpurpose.

5.Thedatasubmittedmustincludedocumentationonthemethodusedtogatherthedata,thenameoftheperson(s)responsibleforpreparingthedata,contactinformation,

anestimationofthehorizontalandverticalaccuracy,andthedateofdatacapture.Allmediashallbefreefromanyandalldefectsandviruses,andlabeledastotheircontents.