ObjectiveTo broaden the exisiting network, ECCC intends to install a new automatic weather station at the Jenpeg Airport. In order to facilitate this, some aspects of the installation will be performed by contractor. These include:Earth work for pad foundationExcavation and installation of new concrete pilesTrenching and installation of new cablingInstallation of power distribution equipment2.0 Reference Documents:Site map, drawings, and photos are included as references3.0 Tasks:3.1 Pad:Supply and deliver suitable fill-soilEstimated to be 300 yardsConstruct raised pad and approachPad Dimensions30m x 30m width0.25m depthApproximate Approach Dimensions10m length3m width0.25m depthLevel and grade the pad/approach, tapering edges3.2 Concrete:Excavation of 8’ depth13 holes, to accommodate 24” dia. form tube2 holes, to accommodate 18” dia. form tube4 holes, to accommodate 12” dia. form tubeConcrete Forms24” dia. form tube, as required18” dia. form tube as required12” dia. form tube as requiredConcrete25 MPaFill 19 cylindrical piles, listed aboveTrowel finished surface, slightly domed to encourage water runoffAdditional MaterialsRebar for three piles as detailed in drawing GT-C-S220 m (or equivalent), vertical10 m (or equivalent), square ringInstallation of threaded rods/anchors & conduitNote:The composition of the ground may not allow excavation to the prescribed depths. If shallower than 3’, threaded rod should be anchored to the bedrock.3.3 Electrical:Install Electrical Service Supply and install 100 amp 120V distribution panel with a minimum of 12 breaker positions housed within appropriate outdoor enclosure. Panel to be mounted behind main instrumentation junction box.Apply for electrical permit with Manitoba Hydro on ECCCs behalf.Supply and install meter socket, and connection to distribution panel. Meter socket must be able to support 100 amp service.Supply and install suitable vertical conduit to accommodate underground service feed.If required, trench and backfill from meter to Hydro feed.Estimated to be 50m.2. Install Weather Station CablingExcavate approximately 150 metres of trench for cable installationAll trenches to be at least 24” deep or as per electrical codeArea is a non-vehicular areaApply flagging and warning tapes to mark signal and power cable when backfillingIf required, supply and install screened sand in trenches, as per electrical codeOne electrical cable to be pulled from the distribution panel, and one run of instrumentation cable from Main Junction Box to each instrument base8" minimum electrical power and signal cable separation for parallel cable run4" minimum electrical power and signal cable separation for perpendicular cable crossingOne electrical cable to be installed from electrical distribution panel to Main Junction Box terminal stripAll power cables to be terminated at each end. Each power cable to be terminated on a separate 15 amp breaker in the distribution panel, and a duplex receptacle housed in an ECCC supplied enclosure at each instrument base. 3. Snow Target ExcavationThree holes to be excavated at locations shown in attached drawing (Black Squares). Holes to be 50”x50”x8” deep.
