The City of Winnipeg Appendix ‘F’ Bid Opportunity No. 19-2015 Page 1 of 1 Template Version: C420150116 - RW

APPENDIX ‘F’

MANITOBA HYDRO (GAS) REQUIREMENTS

18­2015

For your

For your SAFETY

Safe Excavation &

Safety Watch Guidelines

WINNIPEGCall Before You Dig (204) 480-1212 Emergency (204) 480-5900

OUTSIDE WINNIPEG 1-888-MBHYDRO 1-888-624-9376

For your SAFETY

RELEASE OF NATURAL GASIn the event of any damage to a natural gas pipeline (regardless of whether it is steel, plastic or aluminum) or to its protective pipe coating or tracer wire, however minor, call Manitoba Hydro immediately. In most cases there is no charge for minor repairs.

In case of damage causing a release of natural gas:

• Call911andManitobaHydroimmediately.

•Clearpeoplefromthevicinityandpreventpeoplefrom approaching the area of the leak.

•Shutoffallvehiclesandequipment.Removeorextinguish all sources of ignition. DO NOT smoke or allow open flame in the presence of natural gas.

•Ifagaslinehasbeenpunctured,donotremovethetoolorequipmentthatpuncturedtheline.This could result in a larger gas leak and pose a greater hazard.

•DONOTattempttobackfilloveraleakingnaturalgas line or attempt to stop the leak, it is safest to allow the gas to vent into the atmosphere.

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Before you start to dig, contact Manitoba Hydro to locate the underground cables or natural gas pipelines in your area. With a minimum of three days notice (M-F), or at least one week’s notice during construction season, Manitoba Hydro will mark the underground electric and natural gas utilities.

• Alocateformmustbeobtainedpriortoexcavationandspecificinstructions on the form must be followed.

• Ifworkhasnotstartedwithin10calendardaysafterthelocatewasprovidedbyManitobaHydro,youmustrequesttohavetheutilityre-marktheworkareaandprovideanupdatedelectricand/or natural gas facilities locate form.

• Contractorsmustensurethateveryoneontheworksiteisawareof the presence of all gas and electric facilities and ensure that thelocateformiskeptattheexcavationsiteuntiltheexcavationandbackfillarecomplete.

• Thelocationmarkingsmustbemaintainedandkeptvisiblebythepersonorcontractordoingtheexcavation.Becarefulthatsiteoperatorsdonotremovethelinelocationmarkings.

In addition to contacting Manitoba Hydro “Call before you dig” be sure to contact Clickbeforeyoudigmb.com as well as any other underground services that may be in the area.

ThisguidelineappliestothecrossingofManitobaHydroelectricalconductors and natural gas pipelines only. When Manitoba Hydro fibreopticcablesarepresentcontractorswillbereferredbythe Manitoba Hydro Facilities Locator to the Manitoba Hydro communications department for more information.

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Manitoba Hydro only locates facilities that it owns and has no knowledge of or responsibility for privately owned facilities. Electric conductors or gas pipes installed past the meter are owned privately by the property owner, and at times are installed below ground before it enters the building. Outbuildings that are heated or have electric power, wells, septic systems, pumps, pools and hot tubs are examples where privately owned buried facilities may exist.

This booklet has been prepared by Manitoba Hydro for Manitoba Hydro staff, contractors and homeowners involved with excavation and is available at www.hydro.mb.ca/callbeforeyoudig. Information on excavation and safety watch is included to inform excavators about basic requirements for excavation in the vicinity of buried electric power lines and gas pipelines. Unless otherwise indicated, gas pipelines and underground power cables will be called “lines”.

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Table of ContentsWHYYOUSHOULDPLANAHEAD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

PLANNINGLARGEPROJECTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

REGULATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

EXCAVATORPRE-MARKING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Guidelinesforexcavationmarking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8AftertheareaisPre-Marked . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

APWAUNIFORMCOLOURCODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

GUIDELINESFOREXCAVATIONNEARELECTRICALAND NATURALGASLINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10HandDiggingtoExposeLines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10WaterPressure/VacuumSystem(Hydrovac) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11TypicalGasServiceInstallation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13GeneralApproach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13CrossingLines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14WorkingParalleltoLines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14HardSurfaceRemoval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15LineExposed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16NoRelocation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16InspectforDamage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16Backfilling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17ProjectCloseout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

SAFETYWATCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17WhenisaSafetyWatchrequired? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18WhyisaSafetyWatchdone? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18WhopaysforaSafetyWatch? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18HowtogetaSafetyWatch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

DIRECTIONALBORING–CONTRACTORGUIDELINES . . . . . . . . . . . . . . . . . . 19ElectricalConductorsandGasPipelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19ObservationHoleRequiredWhenCrossingAnyManitobaHydroFacility . . . . .20DrillingParalleltoManitobaHydroFacilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

UNPLANNEDCONTACTWITHELECTRICORNATURALGASLINES . . . . . . 22

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WHY YOU SHOULD PLAN AHEADBycallingbeforeyoudig,youpreventdamageandsavethecostsofunnecessaryrepairs.Mostimportant,thecallwillhelppreventthelossoflife,injury,environmentalpollution,equipmentdamage,productlossesandserviceoutages.

It is YOUR responsibility to contact all owners of buried underground services.

PLANNING LARGE PROJECTSDeterminingthelocationofexistingManitobaHydroUndergroundStructureswithintheworkareashouldbeoneofthefirstprioritiesof any work. Knowing the location of all utilities infrastructure allows thethirdpartytoplanworkproactively,mitigatingtheneedforcostlydesign changes or delays during construction.

Gas ManitobaHydrorequeststhatdrawingsbesubmittedforreviewforallprojectsinvolvinggrounddisturbance.Drawingsshallbesubmittedto: gasdesign@hydro.mb.ca.

DrawingswillbereviewedbyManitobaHydroatnocostandaletterprovidingdetailsofanyworkrestrictions,specificrequirementsorcostswillbeprovidedtothecontractor.

Drawingsshouldbesubmittedaminimumof4weeksbeforethestartofanyexcavationwork.Drawingsshallincludethedetailsoftheproposed work and include any gas or electrical line in the work area.

Electric ContactManitobaHydroinWinnipegat(204)480-5900or outsideWinnipegat1-888-MBHYDRO(1-888-624-9376)

Youwillbereferredtothelocaldistrictofficeforfurtherinstruction.

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REGULATIONS Thereareseveralfederalandprovincialagenciesoverseeingtheoperation of and around natural gas pipelines and electric cables. Thefollowingregulationsandsafepracticeguidesspecifyrequirementsforboththecontractorandtheutility:

• ManitobaGasPipelineAct,Regulation140/92– Thelegaldefinitionofanexcavation,outlinesExcavatorand Utilityresponsibilities.

• NationalEnergyBoardPipelineCrossingRegulations: PartISOR/88-528; PartIISOR/89-529plusamendments;

Formoredetails,checkExcavationsandConstructionNewPipelinesNationalEnergyBoard,January2000

• WorkplaceSafetyandHealthActW210andRegulations#217/2006,Part26.

• ManitobaWorkplaceSafety&HealthRegulationPart26–ExcavationsandTunnels–Describeslegalresponsibilitiesinregardstoexcavatingsafely.

• GuidelineforExcavationWork,ManitobaWorkplaceSafety &HealthDivision

• CSAZ247DamagePreventionStandard(pending)

CopiesoftheseregulationsandsafepracticeguidelinesareavailablefromManitobaHydroortheappropriategovernmentagency.

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DEFINITIONSDaylighting–Atermusedtodescribetheuncoveringandexposingof underground utilities to daylight without the use of mechanical excavation.

Excavation–includesdigging,boring,pushing,ploughing,trenching,grading, post installation and breaking and displacement of soil or othermaterialbelowtheexistinglevelofthegroundthatwilldisturbmorethanthetop150mm(6inches)oftheground.

High Pressure gas line–Anaturalgaslinethatoperatesinexcess of700KPa(100psi).

Hydrovac–Atruckortrailerthatinjectspressurizedwaterfromanonboardresevoirtankintothegroundthroughahandheldwand.Asthesoilcoverisliquefied,theresultingslurryissimultaneouslyextractedbyapowerfulvacuumandstoredinanonboarddebristankfor later disposal.

Large diameter pipeline–Anaturalgaspipelinethatis168.3mm (6inches)indiameterorlarger,regardlessofoperatingpressure.

Safety Watcher–ApersondesignatedbyManitobaHydrotoensurethatworkersarenotputatriskasaresultofspecialhazardsonthework site.

Sonde-Atransmitterbehindtheboreheadwhichregistersangle,rotation, direction and temperature data.

Tolerance Zone–Thespaceinwhichalineorfacilityislocated, and in which special care is to be taken.

White lining–Designatingtherouteand/orworkareaoftheexcavationusingwhitepaint,stakesand/orflagstooutlinetheworkareapriortothelocatorarrivingonthesite.

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EXCAVATOR PRE-MARKINGPre-markingyourproposedworksiteallowsexcavatorstoaccuratelycommunicate to Manitoba Hydro’s facility locators where the excavationistooccur.Thismaybeaccomplishedeitherelectronicallyor by white lining.

Forexcavatorpre-marking,callManitobaHydroforafacilitieslocateat204-480-1212oroutsideWinnipeg1-888-MBHYDRO (1-888-624-9376)(MondaytoFriday–7:00a.m.to11:30p.m.; Saturday–8:00a.m.to4:00p.m.)

CommunicatetoManitobaHydrowheretheexcavationistooccurand:

• Provideamapoftheexcavationareaviaemailor

• Pre-marktheexcavationareabywhitelining

Ineitherscenarioyouwillbeissuedareferencenumberandnotifiedof the day the locator will be on site.

When a project is too large for or not conducive to pre-marking, face-to-face meetings between Manitoba Hydro’s facility locator and the excavators will be arranged at the proposed work site.

Electronic InthesubjectlineoftheemailthatyousendtoManitobaHydro,notethereferencenumberthatyouwereprovidedaswellasthearea/townandaddressoftheexcavationsite.Attachalegiblemapthatclearlyidentifiesyourworkarea.FortheCityofWinnipegsendmapstoExcavatorpre-marking@hydro.mb.ca.Forruralareas,pleasecontactthedesignateddistrictofficefortheproperemailaddress.(notavailableinallareas)

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White Line Theexcavatordesignatestherouteand/orareaoftheexcavationusingwhitepaint,stakesand/orflagstooutlinetheworkareaprior tothelocatorarrivingonthesite.

Whitepaint,whitestakesorwhiteflagswiththeexcavator’scompanyidentifieronthemarepermissiblemethodsofmarking.

Whenusingstakesorflagstomarktheexcavationworkarea, donotdrivethemintothegrounddeeperthan150mm(6inches). Anyactivitywhichdisturbsmorethan150mm(6inches)musthavethe facilities located.

Guidelines for excavation markingThefollowingmarkingillustrationsareexamplesofhowexcavatorsmaychosetomarktheirareaofproposedexcavation.Theuseofwhitemarkingproducts(e.g.paint,flags,stakes,oracombination ofthese)maybeusedtoidentifytheexcavationsite.

Markinwhitepainttheproposedareaofexcavationthroughtheuseof a continuous line, dots marking the radius or arcs, dashes marking thefourcornersoftheproject,ordashesoutliningtheexcavationproject.Limitthesizeofeachdashtoapproximately150–300mm(6-12inches)inlengthand20mm(3/4inch)inwidthwithintervalspacingapproximately1–5metres(3-16feet)apart.Themaximum

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separationofexcavationmarksistobereducedtoalengththatcanbe reasonably seen by the operator’s locators when the terrain or excavationsiteconditionswarrantit.Dotsofapproximately20mm(3/4inch)diameteraretypicallyusedtodefinearcsorradiiandmaybeplacedatcloserintervalsinlieuofdashes.

Ifanexcavationiscontainedwithina5metre(16feet)maximumradius then it can be marked with a single white stake at the centre oftheexcavation.Thestakemustclearlystatethecompanyidentifierandtheradiusoftheexcavationinblacklettering.ThisinformationmustbeconveyedtoManitobaHydro.

After the area is Pre-MarkedOn the appointed date, the locator will identify the Manitoba Hydro facilitiesthatarelocatedinthedesignatedworkarea.TheywilldocumentitusingasketchormapattachedtotheElectricand/orNatural Gas Facilities Locate Form.

When the locator has completed locating the facilities, they will advisetheexcavatorofcompletionandifthereisaconflict.Thelocaterequestsheetwillbeavailableatthedesignateddistrictofficethenextworkingday.Theexcavatormustpickupandsignthefacilities locate form.

TheManitobaGasPipelineAct,Regulation#140/92andtheWorkplaceSafetyandHealthAct,regulations#217/2006,part26.6requirethatavalidutilitieslocateadviseformbeontheworksiteatalltimesuntiltheprojectiscomplete.

Iftheexcavatorfailstosignandpickupthefacilitieslocateformatthedistrictandexcavateswithoutthefacilitieslocateformonsite,thelocateisnotvalid.Theexcavatorcouldfaceconsequenceswhichmayincludefinesand/orsanctionsbyManitobaWorkplaceSafetyand Health and Manitoba Hydro.

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APWA UNIFORM COLOUR CODEUndergroundutilitymarking

GUIDELINES FOR EXCAVATION NEAR ELECTRICAL AND NATURAL GAS LINESHand Digging to Expose LinesMechanicalexcavationcannotbeusedwithin1metre(39inches) ofanelectricalorgaslineuntilthelineisphysicallyexposedbyhand. Handexposingmeansexposingaburiedfacility,whoselocationhasbeen marked by Manitoba Hydro, using non-powered tools such as aSpadeorshovel(handaugersarenotacceptable).Awaterpressure/vacuumsystem(hydrovac)isanacceptablealternative.

Thereareseveralthingstorememberwhenhandexposing:

• Nooneshouldeverjumponorusetheirentirebodyweight onashovelwhendigging.

• Useaprying(ratherthanstriking)motiontoloosenharddirt.

• Neverprobeforthefacilityusingasharppointedtoolsuch asapickaxeorpointedbar.

• Digonanangleifpossible,suchthatanycontactwiththefacilityis a glancing blow rather than a direct hit.

WHITE–ProposedExcavation

PINK–TemporarySurveyMarkings

RED–ElectricPowerLines,Cables,ConduitandLightingCables

YELLOW–Gas,Oil,Petroleum,orGaseousMaterials

ORANGE–Communication,AlarmorSignalLines,CablesorConduit

BLUE–PotableWater

PURPLE–ReclaimedWater,IrrigationandSlurryLines

GREEN–SewerandDrainLines

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Oncethelineisvisible,mechanicalexcavationequipmentcanbeusedinaccordancewiththeguidelinesformechanicalexcavation.

Water Pressure/Vacuum System (Hydrovac)Analternativetoexposingcablesbyhanddiggingistouseawaterpressure/vacuumsystemcapableofexposingManitobaHydrofacilities without damage.

Onlyoscillatingheadtypenozzlesaretobeusedforthewaterwand.Whenexcavatingwithin1metreofamarkedlinethemaximumsettingof38°C(100°F)watertemperatureand10,342Kpa(1,500psi)mustnotbeexceeded.Theendofthevacuumtubeshallbeneopreneorequivalent.Exposetheburiedlinebyusingasweeping motion only, perpendicular to the locate markings, until thelineissighted.IMPORTANT: After sighting, the line shall not be contacted by spray or vacuum to avoid damage to wraps and coatings.

Someacceptableexcavationmethods:

a) Dig Vertically

Digaholewithashoveldirectlyabovethelinelocationuntilthelineisexposed.Takecarenottodamagethelineorcoating.MechanicalexcavationequipmentMUSTNOTbeusedtowidenordeepentheholebeforeexposingtheline.

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b) Dig Laterally

1m (39”)

Digatrenchorbellhole1metre(39inches)fromthelinelocation,paralleltotheline,thenhanddiglaterallytoexposetheline.

c) Dig Trench and excavate

Digatrenchbyhandacrossthefullwidthoftheexcavation(perpendiculartoor“acrossfrom”theline).Ifthelineisnotuncovered,mechanicallyexcavatetoonehalfthedepthofthetrench.Repeatthisprocessuntilthelineisexposed.

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Typical Gas Service Installation (exampleonlydoesnotrepresentallinstallations)

Fittingssuchasactiveorabandonedserviceteesmaybepresent ongaspipelines,exercisecarewhenexcavating.

General Approach• Whenthelineisnotvisible,mechanicalexcavationshallnotbe

usedwithin1metre(39inches)ofanelectricalorgasline.

• Whenthelineisvisible,mechanicalexcavationcanbeusedtowithin450mm(18inches)fornaturalgaslinesand600mm (24inches)forelectricallines.

• Whensoilconditionspermit,asmoothedgebucketshouldbeusedatalltimeswhenexcavatingneargasandelectricallines.

• Anobserver(excavatorstaff)locatednearthelinemustmaintaincommunication and control of the operator at all times by the useofhandsignalsandverbalcommunication.Theobserverisresponsible for maintaining the minimum distance from the pipe. Ifatanypointtheobserveroroperatorisunclearofthelocationor orientation of the line, no digging shall occur until this is confirmedandagreeduponbyallontheworksite.

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Crossing Lines• Whencrossingaline,thelineistobeexposedforthewidth

oftheexcavation.

• Afterthelineisdaylighted,andprovidedthereisspaceforexcavatoraccess,itisrecommendedthatexcavationnearthe line be performed parallel to the line.

Working Parallel to Lines• Whenworkingparalleltoalineitisnotnecessarytoexpose

the full length of the line to reduce the acceptable mechanical excavationseparation.Aseriesofdaylightholesalongthelineisacceptable.Thedistancebetweendaylightholeswillbeamaximumof10metres(33feet)orasrequiredtodefinethelocation of the line. Daylight holes must be large enough to exposethefullwidthofthelineorlines.

• Afterdaylightingandpreviewingoftheline,marksshallbe placedaminimumof450mm(18inches)fromtheoutsideofthelineateachdaylightholeforgasand600mm(24inches)

Before line is exposed

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forelectricallines.Thistolerancezoneshouldbemarkedalongthe entire length of the work area to ensure that the operator maintains proper alignment with the line. With the line daylighted andthetolerancezonemarked,itisacceptabletousemechanicalexcavationontheoutsideofthemarkedline.

• Ifatanypointthelinebecomesobscured,itshallberemarkedimmediately.Theobserverisresponsibleformaintainingtheminimumdistancefromthepipebyconfirmingthemachine’sdistance and alignment with the line.

• Theoperatorwillorienthismachinesotheirbucketremains morethan450mm(18inches)awayforgasand600mm (24inches)awayforelectric,andparalleltotheline.Theywill alsopreviewtheworkpriortoenteringtheirmachineandprior to any trenching.

Hard Surface Removal• Mechanicalequipmentcanbeusedtoremovetheasphaltor

concreteroad/sidewalksurfaceandshouldonlybeusedtothedepth of that surface.

• Avoidstartingthepavementbreakdirectlyoverthemarkedfacility.

• Startafewfeetawayfromthemarksandattemptto“peeloff”thepavementorbreakitintosmallchunksforremoval.

Once line is exposed

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Line ExposedWhenalengthoflineisexposedconsulttheutilityforproperhandlingprocedures.Thelinemayneedtobesupportedtopreventsettling or sagging.

No RelocationThelineshallnotbemovedorrelocated.Nooperationorworkshallbe done that would put stress on the line.

Inspect for DamageElectricPowerLines–Ifapowercablehasbeenexposed,contactHydro to inspect the cable for damage.

GasPipelines–Thoroughlyclean(withwateronly)andinspecttheexposedgaslinefordamagetothepipe,yellowplasticpipecoveringor tracer wire (used on plastic pipe).

ReportContactorDamage–Anycontactwithordamagetoany line or underground cable must be reported immediately to Manitoba Hydro.

BackfillingBeforebackfilling,ManitobaHydrorequiresaninspectionofallexposedpowercablesandgaslinesfordamage.

ElectricPowerLines–Ifdamagetoanelectricpowerlineissuspected, contact Manitoba Hydro to inspect the cable for damage.

GasPipelines–Thoroughlyclean(withwateronly)andinspecttheexposedgaslinefordamagetothepipe,yellowplasticpipecoveringortracerwire(usedonplasticpipe).Ifdamageisfound,notify Manitoba Hydro and they will repair minor damage to the pipe coating or tracer wire at no charge.

Topreventsettlingorstress,thecontractorisrequiredtoplacecleanfillunderthepowerorgaslineandcompactthefill.Thebackfillmaterialmustbefreeofrocks,sharpobjectsorothermaterialthatcoulddamagetheline.Ifthebackfillmaterialisfrozen,itshouldbefreeoflargefrozenlumpsofsoil.Thebackfillmaterialmustbe

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graduallyplaced,notdumped,ontheline.Alternatively,thelinemaybehandpaddedwith300mm(12inches)ofscreenedsandorsoftfillbeforebackfilling.

Ifmechanicalprotectionisrequired,orifthebackfillcontainsrocksordebris,thecableorpipelinemustbeenclosedina150mm (6inches)envelopeofscreenedsand.

AccessManitobaHydroutilitypersonnelshallhaveaccesstotheexcavationto inspect the underground line at any time during construction.

Project CloseoutWhentheexcavationprojecthasbeencompletedallflagsandstakesusedtomarkgasandelectriclinesshallberemovedfromthesite.

SAFETY WATCHSafetyWatchisaprogramwhereaqualifiedemployeeofManitobaHydroobservestheexcavationworkinprogressanddeterminesactionstobetakenbythecontractortopreventinjury,propertydamage or damage to Manitoba Hydro facilities.

SafetyWatchpersonnelworkwiththeexcavatortocheckthat:

• theexcavationisdonesafely;

• rulesandproceduresrelatedtotheexcavationarefollowed;

• theplantislocatedaccurately;

• alldocumentationisaccurateandcomplete;

• Hydrovacguidelinesarefollowed.

SafetyWatchpersonnelshallberecognizedasanauthorityonsitewiththeabilitytoshutthejobdown.

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When is a Safety Watch required?Anyexcavationwithin3metres(10feet)ofacableorpipelinemayrequireaSafetyWatch.TheneedforaSafetyWatchwillbeassessedduringanon-sitemeetingheldbetweenanauthorizedemployeeofManitobaHydroandthecontractorundertakingthework.ThedecisiontoprovideaSafetyWatchwillbebasedontheexcavationproposed,thetypeofcableorpipeline,andtheproximityoftheexcavationtothecableorpipeline.

Why is a Safety Watch done?SafetyWatchserviceisprovidedtoensurethesafetyofcustomersandtheircontractorswhenworkingincloseproximitytoeitherenergizedelectricalorpressurizedgaslines.Inaddition,thisprotectstheintegrityoftheutilitylinesminimizingthechanceofanoutage.

NOTE:Typically, Safety Watch personnel are not provided for low voltage conductors (under 750 volts) or distribution pressure gas mains and services under 168.3 mm (6 inches) diameter. However, Manitoba Hydro staff may assess the situation and choose to provide Safety Watch personnel where conditions warrant.

Who pays for a Safety Watch?Generally,SafetyWatchserviceisprovidedatnocosttothehomeownerforminorprojects.Forlargerprojects,thecontractormaybechargedatacostsharedrate.Contactthelocaldistrictofficefor further information.

How to get a Safety Watch.Whenanundergroundlineislocatedinresponsetoa“CallBeforeYouDig”call,theManitobaHydroemployeewillindicatewhetheraSafetyWatchisrequired.AcalltoManitobaHydroisrequiredtoarrangeforaSafetyWatchappointmenttypicallywithinthreebusinessdaysbeforeanyexcavationistooccur.

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DIRECTIONAL BORING – CONTRACTOR GUIDELINESAswithallgrounddisturbanceactivity,theexcavatormustfirstobtaina facilities locate from Manitoba Hydro.

ThedistancemeasuredtoManitobaHydroelectricalconductororgas pipeline must always be measured from the outside diameter or wall of the Manitoba Hydro facility to the outside diameter of the backreamer.Thesamemeasuringmethodologymustbeusedwhenparalleling Manitoba Hydro facilities.

Whenboringwithinthetolerancezoneofahighpressureorlargediameter gas pipeline or any critical distribution gas pipeline or electricalconductor,asidentifiedbyManitobaHydro’sFacilitiesLocatepersonnel,qualifiednaturalgasorelectricSafetyWatchpersonnelarerequired.

Electrical Conductors and Gas PipelinesPriortodirectionalboringacrossManitobaHydrogasandelectricallines,theburieddepthmustbeconfirmed.Acceptablepracticetoverifylinedepthisto:

• Exposethelinebyhanddigging,or

• Exposethelinebywaterpressure/vacuumexcavation;or

• Locatingonthesidewallofatrenchthathasbeenexcavated 1metre(39inches)oneithersideofthesurfacelocates;or

• Byuseofreferencemeasurementsthatareknowntobeaccurate,forexample:electricalductlines.

• Thedrillheadand/orbackreamershouldatalltimesmaintainaminimumof1metre(39inches)clearancefromallManitobaHydro lines.

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Whereundergroundfacilitycongestiondoesnoteffectivelyallowa1metre(39inches)clearance/separationfromManitobaHydrolines,the contractor may consult with Manitoba Hydro Engineering for sitespecificdirection.Anydeviationsinclearances/separationsmustbeprovidedinwritingandmustbepresenton-sitewhentheworkisbeing performed.

1m (39”) IN FRONT OF LINE

Observation Hole Required When Crossing Any Manitoba Hydro Facility Theaccuracyofthedrillheadlocationanddepthmustbevisuallyverified1metre(39inches)priortocrossingManitobaHydrofacilities.Anobservationordiscoveryholeisrequired.

Acceptablepracticeforopeninguptheobservationholeisusingwaterpressure/vacuumorhanddigging.

Whenboringheadand/orbackreamerspathiscrossingaboveanaturalgaspipelineorelectricalconductortheboringheadand/orbackreamermustbevisuallyobservedcrossingthefacility.

Whenboringheadand/orbackreamerspathiscrossingbelowagaspipelineorelectricalconductoranobservermustverifythattheboreheadand/orreamerdoesnotentertheobservationhole.

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Theminimumdimensionsoftheobservation/discoveryhole MUSTBE:

• 1metre(39inches)infrontofthegaspipelineorelectricalconductoronthenearsideoftheborepath;

• 300mm(12inches)onthefarsideoftheborepath;

• 300mm(12inches)oneachsideoftheborepath;

• 300mm(12inches)belownaturalgaspipelineorelectricalconductor.

1 m (39”) MINIMUMCLEARANCE FROMREAMER

Drilling Parallel to Manitoba Hydro FacilitiesParallelingElectricalConductors&NaturalGasPipelines

Theremustbe1metre(39inches)ofseparationbetweentheoutside diameter of the back reamer assembly and the outside diameter of any Manitoba Hydro electrical conductors or natural gas pipelines.

NOTE:When drilling within 1 metre (39 inches) horizontally, the drill must be kept at a depth either deeper or shallower than the existing electrical conductor or natural gas pipeline to maintain 1 metre (39 inches) separation when measured diagonally.

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If1metre(39inches)horizontalseparationcannotbemaintained,theelectricalconductorornaturalgaspipelineadjacenttotheborepathmustbeexposed.Whenitisnotpossibletode-energizeelectricalconductors,aSafetyHold-OffmustbeinplaceandqualifiedSafetyWatchpersonnelmustbeonsite.

Whensuspectedofdrillingwithin1metre(39inches)ofanygasor electrical lines determined by the boring head (sonde) position readingsandtheproximitytothelocatemarks,thelocationoftheconductororpipelineshallbeverified;theelectricalconductorornaturalgaspipelineadjacenttotheborepathmustbehandexposedorexposedbywaterpressure/vacuumexcavationasdeterminedbyManitobaHydro.Thefrequencyofexposuresdependsontheconsistencyofthealignmentoftheexistingfacility.

ManitobaHydrofacilitiesmustbeexposedaminimumofonceevery10metres(33feet),toconfirmalignment.Wherethereisan alignment change indicated by the locator marks, the Manitoba Hydrofacilityshallbevisuallyconfirmedateachalignmentdeviation.

UNPLANNED CONTACT WITH ELECTRIC OR NATURAL GAS LINESThisprocedureguidelineappliestopeoplewhocomeincontactwithorsimplyexposeaburiedutilitylinewhileexcavating.

Anyonewhocomesincontactwithburiedutilitylinesshouldcontacttheutilityownerimmediately.Althoughtheremaybenoapparentexternaldamage,theimpactofstrikingalinecancauseinternalstructural damage that can only be determined and repaired by qualifiedutilitypersonnel.Generally,wedonotchargeforthisinspection and coating repair.

Abrasions

Evenifcontactdoesnotcausetheutilitylinetostopworking, anickorcuttotheouter,protectivesheathoftheutilitylinecanallow ground water, laden with salts and other caustic substances, tocorrodetheline.Abrasionsmaycompromisethesidewallstrengthof a plastic or aluminum gas line.

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Aerial

Cablessuspendedalongutilitypolescaneasilybedamagedifstruckbyavehicleoramechanicalimplementlikeahydrauliclift.Cableclamps and other attachments can be pulled apart and component housingsmayhidedamagetotheelectronicequipmentinside.

Stop Work

Operationsatthesiteshallstopimmediately.Ifanyequipmentissnaredintheutilitylines,itshouldbeleftinplace.Tryingtoextract,flexormanipulatethelinecancompoundthedamage.

Call It In

ThepersoninvolvedintheincidentshouldcallManitobaHydroimmediatelyandreportthelocationofthehit.Theexactaddress, or street intersection, along with what type of contact occurred, will help the utility respond in an appropriate manner.

Notes

CALL BEFORE YOU DIG

WINNIPEGCall Before You Dig (204) 480-1212 Emergency (204) 480-5900

OUTSIDE WINNIPEG 1-888-MBHYDRO 1-888-624-9376

Pleaseremembertocontact Clickbeforeyoudigmb.com

aswellasanyotherundergroundservices that may be in your area.

For more information www.hydro.mb.ca

Rev.201405