Reference Document - Access Review

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                                                              A: 1/9 Greg Chappell Drive,
                                                              Burleigh Heads, QLD, 4220
                                                              protestengineering.com


FEATURE     CHAINAGE         DESCRIPTION                        REMEDIATION/WORKS                                                  IMAGE
Access      General    Rutting of the road and        Regrade access road, provide 2.5% crossfall
Drive                  evidence of poor drainage      to improve drainage. Formalise table drains
                                                                                                                                           Heavy rutting noted in places.
                                                      where required. Resurfacing and grading
                                                                                                                                           Where evident regrade and
                                                      required in places with 100mm crushed                                                cover with 100mm compacted
                                                      stone.                                                                               road base.
                                                      (Note: It is understood that the client
                                                      undertakes regularly maintenance of the
                                                      access roads as and when required)




Spillway    +460m      Evidence that there is         Provide a concrete lined spillway channel to
Crossing               erosion      when     pond     prevent erosion and provide better access.         Form concrete lined ‘v’
                       overtops and crosses the       Spillway apron should be approx. 5m wide           spillway.
                       access road.         Flows     150mm thick N32 concrete with SL82 steel
                       evident to cause soft          mesh reinforcement with 50mm cover.
                       ground and may cause           Concrete base to have slip membrane and
                       difficulty for smaller cars    min 300mm thick layer of compacted Type
                       to pass. No flow depth         2/3 gravel laid on geotextile.
                       indicator to warn drivers      Spillway to be formed to ‘V’ channel profile
                       of flows over road.            to min 3.3% section falls and min 2.5% cross
                                                      fall to downstream side to direct channel
                                                      flow. Provide rock armouring upstream and
                                                      downstream of min D50150mm rock 1m
                                                      either side of spillway.
                                                      Provide Flow Depth indicator and Spillway
                                                      Warning sign



                                                     Gold Coast | Sunshine Coast | Melbourne | Emerald
PTP/02903                                                                                                                                          8 April 2019