Review of Environmental Factors - Transport for NSW - NSW ...

Two new 12 core single mode optical fibres (SMOF) will be run in two new separate conduits within a singletrench from the BTS cabinet to a new pit at SW79+774 in the down cess, approximate trenching distance is 17metres, from this point the two fibres will run through a new underline crossing to existing pit 2ATP04281 atSW79+774 in the up cess, at this point the two 12 core SMOF will take diverse routes to connect to theRailCorp Bearer Network. From pit 2ATP04281 fibre 2ATSXXXA will be routed through an existing RailCorpdirectional bore and pit and pipe route to NAP 2ATJ0101 where the fibre will be spliced to the RailCorp BearerNetwork. From pit 2ATP04281 fibre 2ATSXXXB will be routed through an existing RailCorp pit and pipe anddirectional bore to NAP 2ATJ0440 where the fibre will be spliced to the RailCorp Bearer Network. Fibreconnections are to be carried out by RailCorp.3.1.5 EarthingThe earthing installation will comprise six earth stakes at a pre determined distance apart. The grid will benominally 4.0 metres x 2 metres, placing the 6 earth stakes 2.0 metres apart. Once these earth stakes havebeen installed, the system will be tested and modified if needed.The initial extent of the trenching for earthing grid will be around 20 metres. However, it can be extended if theresults show that the earthing arrangement is insufficient3.2 Construction MethodologyConstruction of the BTS facility will require the use of approximately 200 square metres of land within theeastern side of the Illawarra Relief track. This area will allow for the erection of the monopole, power pole andthe slab containing the BTS and power cabinets.The monopole foundation will require an excavation approximately five metres deep with a diameter of onemetre. Approximately 10 square metres of ground disturbance is expected as result of excavation for monopole,power pole and a concrete slab. This will result in approximately ten cubic metres of excavated material. Thesoil from these excavations will be stockpiled before being used for backfilling and/or disposed of site. Soil thatcannot be used for backfilling (including, paving, rocks, etc) will be placed into a skip bin and removed from siteat the completion of construction works.Installation of the earth grid as well as power and fibre optic cables will require excavation of trenchesapproximately 1000 millimetres maximum depth. A total length of trenches is estimated to be around 100metres. All trenching excavation will be backfilled before the end of shift. If not practicable, trenches will becovered during nightThe construction methodology of the facility will include elements outlined below.• Non-destructive excavation before construction to establish underground installations.• Site establishment.• Excavation of the foundation for the monopole using excavator, drills or auger.• Delivery and pouring of concrete on site for the monopole foundation.Page 23 of 67