Additional photos showing the site before and after works in different areas are shown in Figure 11 . A ) Gully 1a – Before
B ) Gully 1a - After
C ) Gully 10 – Before
D ) Gully 10 - After
Figure 11 . Photographs showing A ) Gully 1a before and B ) Gully 1a after , C ) Gully 10 before and D ) Gully 10 after the Phase 1 works . Source : NQ Dry Tropics .
Phase 2 ( LRP17-1001 Commonly referred to as Phase 2 of Trial Site One )
Gully remediation phase two at Mt Wickham has been completed . The work consisted of a series of rock chutes in the main gully and the side gullies . The chutes have been designed to intercept flows and reduce flow rate . The principal aim of Mt Wickham phase two works was the same as phase one , to undertake groundworks to reduce erosion , establish vigorous vegetation and reduce the export of coarse and fine sediment .
Phase two consists of ;
● a series of five rock chutes in both the main gully and the side gullies consisting of 1500 tonnes of rock
● bulk earthworks undertaken on four gullies to reform soil into a continuous slope which has been compacted and stabilised
● extensive amelioration works with gypsum application varying across the site depending on the existing condition of the soil .
Prior to the start of the earthworks , available topsoil was stockpiled and used in the revegetation process . The revegetation design included using mill mud . Like Phase One , Phase Two was a Verterra-Alluvium Unincorporated joint venture .
The full design specifications for the project are available from NQ Dry Tropics .
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