MCU14/0056 Response to SARA - Consulting Report

                                                                                      150 mm layer of 50-75 mm
                                                                                      aggregate to form road surface
                                                                                                                          Lowering the road surface below the top of bank can
                                                                                                                          allow the use of fewer pipes while still allowing flood
                                                                                                                                                                                                  50-75 mm aggregate
                                                                                  Pipes with sufficient capacity          flows to overtop the structure without causing excessive
                                                                                                                                                                                                  on road surface
                                                 Existing ground                  to carry channel full flow and          bank erosion
                               Filter fabric
                                                                                  placed on a bed of washed aggregate



                              Slides slopes no
                              steeper than 3:1                       Rock or
                                                   3m (min)
                                                                     earth fill                                          (b) Typical profile of temporary culvert crossings of wide channels
                              0.3 m
                              (min)


                                                   Section                                          Plan
                                  (a) Preferred arrangement for temporary culvert crossings
                                                                                                                                                                                         Level spreader
                                                                                                                          Whoa-boy (cross bank)                                          (preferred drainge option




                                                                                                                                                           Low-traffic acc
                              In situations where it is not practicable to allow overflows to initially passing around                                                                   only when suitable
                              the culvert on a stable (well vegetated) stream bank, then the center must be set low                                                                      discharge conditions exist)
                              to allow flow to pass over the culvert along the centreline of the channel

                                                                                                 150 mm layer of                                                                                Grassland or
                                                                                                 50-75 mm aggregate                                                                             bushland filter




                                                                                                                                                                           ess
                                                                                                 to form road surface

                                                                                                                                                          Culvert
                                                                         Filter cloth             Slides slopes                                                                  Waterc
                              Pipe placed on                                                      no steeper than 3:1                                                                   ourse
                              a bed of washed
                              aggregate                                   3 m (min)
                                                  Rock fill                                                   0.3 m
                                                                                                                         (d) Typical arrangement of surface runoff controls associated with
Catchments & Creeks Pty Ltd




                                                                                                              (min)
                                                                                                                                                  approach ramps
                                                                            Section
                                                                                                                                   Drawn:      Date:

                                  (c) Alternative layout for the crossing of confined channels                                       GMW        Dec-09 Temporary Culvert Crossing TCC-01