Traffic and Access during Construction Changes and potential disruptions to traffic and access arrangements during the construction phase are removed from the Milton Road and Kelvin Grove Road areas. Maintenance of the efficient traffic flow along the Western Freeway and the ICB and access to the worksites during construction would be achieved with traffic staging as described in the EIS and refined further during the detailed design phase.
Construction Spoil The estimates of spoil quantities, placement and truck numbers for the Project are provided in Table 3-3. Table 3-3 Total Spoil Quantity Estimates and Placement Locations
Worksites and Construction areas
Mt Coot-tha Quarry 3 (Bank m ) EIS RP
Project 973,000
2
Swanbank 3 (Bank m )
Port of Brisbane 3 (Bank m )
Spoil Quantity Estimate 3 (Bank m )
EIS RP
Project
EIS RP
Project
EIS RP
Project
Western Freeway
840,000
265,000
265,000
NIL
NIL
1,105,000
1,238,000
Toowong (Milton Road)
240,000
NIL
20,000
NIL
NIL
NIL
260,000
NIL
Kelvin Grove Road
NIL
NIL
NIL:
NIL
300,000
NIL
300,000
NIL
ICB
NIL
NIL
NIL
NIL
25,000
25.000
NIL
25,000
Total Spoil
1,080,000
973,000
285,000
265,000
325,000
25,000
1,690,000
1,263,000
Total truck numbers (each 13m3)
18,500 1
Conveyor
22,000
20,400
25,000
2000
65,500
22,300
Duration of works (months)
14
14
14
14
23
23
Average number of truck loads per day
43
NIL
60
58
52
3
Table Notes 1)
From the Milton Road Worksite to the Western Freeway Worksite for transfer to the conveyor
2)
The increase estimate includes material that would now be removed by the TBM through the area of the EIS Reference Project Y-junctions. These Y-junctions are no longer required and the “additional” spoil includes the area of the mainline tunnel through these junctions, previously attributed to part of the construction of the local connecting ramps and their spoil removed from the local worksites, now no longer required.
Opportunities for reuse of spoil in the construction of embankments/reinforced earth at the Milton Road ramps are removed in the Project but potential for use of suitable spoil as invert fill in sections of the TBM driven tunnels remains.
Energy At the Western Freeway worksite, the estimated electrical demand during construction would increase marginally by 900kVA to approximately 22,500kVA, but the electrical demand estimated for the Milton Road and Kelvin Grove worksites (6870kVA at each) would no longer be required. The increase at the Western Freeway worksite is because the TBM will now excavate the sections of tunnel that, in the EIS, were the underground Y-junctions that would have been constructed by road headers with the TBM walked through the open space (ie no electrical demand during that section of the construction). A low voltage requirement of 100kVA at the ICB work area would be sourced from the existing distribution system.
Water The Project would need water supplied to the Western Freeway worksite only so halving the total estimated water requirements as shown in Table 3-4.
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