Catchments & Creeks guidelines

Maintenance
                                                 7. Grass height should be maintained at a
1. Inspect the level spreader after every           minimum 50mm blade length within the
   rainfall event until vegetation is               level   spreader   and   downstream
   established.                                     discharge area, and a maximum blade
                                                    length no greater than adjacent
2. After establishment of vegetation over
                                                    grasses.
   the level spreader, inspections should
   be made on a regular basis and after
                                                 Removal
   runoff-producing rainfall.
                                                 1. Temporary level spreaders should be
3. Ensure that there is no soil erosion and         decommissioned       only     after   an
   that sediment deposition is not causing          alternative stable outlet is operational,
   the concentration of flow.                       or when the inflow channel is
4. Ensure that there is no soil erosion or          decommissioned.
   channel damage upstream of the level          2. Remove collected sediment and
   spreader, or soil erosion or vegetation          dispose of in a suitable manner that will
   damage downstream of the level                   not cause an erosion or pollution
   spreader.                                        hazard.
5. Investigate the source of any excessive       3. Remove and appropriately dispose of
   sedimentation.                                   any exposed geotextile.
6. Maintain grass in a health condition          4. Grade the area and smooth it out in
   with no less than 90% cover unless               preparation for stabilisation.
   current weather conditions require
   otherwise.                                    5. Stabilise the area as specified on the
                                                    approved plan.




                       Figure 3 – Alternative level spreader layout




                       Figure 4 – Cross-sectional profile of end sill


© Catchments & Creeks Pty Ltd            V2 February 2010                            Page 5