Appendix D - Erosion and Sediment Control Plan

      INSTALLATION                           ADDITIONAL REQUIREMENTS FOR TURF       THE TURF AND THE SOIL SUCH THAT        3. DISPOSE OF ANY COLLECTED
                                             PLACEMENT:                             SEEPAGE FLOW BENEATH THE TURF IS       SEDIMENT OR FILL IN A MANNER THAT
      1. REFER TO APPROVED PLANS FOR                                                AVOIDED.                               WILL NOT CREATE AN EROSION OR
      LOCATION, EXTENT, AND CONSTRUCTION     1. TURF SHOULD BE USED WITHIN 12                                              POLLUTION HAZARD.
      DETAILS. IF THERE ARE QUESTIONS OR     HOURS OF DELIVERY, OTHERWISE           9. WATER UNTIL THE SOIL IS WET 100mm
      PROBLEMS WITH THE LOCATION, EXTENT,    ENSURE THE TURF IS STORED IN           BELOW THE TURF THEREAFTER,             REMOVAL
      OR METHOD OF INSTALLATION, CONTACT     CONDITIONS APPROPRIATE FOR THE         WATERING SHOULD BE SUFFICIENT TO
      THE ENGINEER OR RESPONSIBLE            WEATHER CONDITIONS (e.g. A SHADED      MAINTAIN AND PROMOTE HEALTHY           1. WHEN THE CONSTRUCTION WORK
      ON-SITE OFFICER FOR ASSISTANCE.        AREA).                                 GROWTH                                 ABOVE A TEMPORARY DIVERSION
                                                                                                                           CHANNEL IS FINISHED AND THE AREA IS
      2. ENSURE ALL NECESSARY SOIL           2. MOISTENING THE TURF AFTER IT IS     MAINTENANCE                            STABILISED, THE AREA SHOULD BE
      TESTING (e.g. SOIL pH, NUTRIENT        UNROLLED WILL HELP MAINTAIN ITS                                               APPROPRIATELY REHABILITATED.
      LEVELS) AND ANALYSIS HAS BEEN          VIABILITY                              1. DURING THE SITE'S CONSTRUCTION
      COMPLETED, AND REQUIRED SOIL                                                  PERIOD, INSPECT THE DIVERSION          2. DISPOSE OF ANY COLLECTED
      ADJUSTMENTS PERFORMED PRIOR TO         3. TURF SHOULD BE LAID ON A MINIMUM    CHANNEL WEEKLY AND AFTER ANY           SEDIMENT OR FILL IN A MANNER THAT
      PLANTING.                              75mm BED OF ADEQUATELY FERTILISED      INCREASE IN FLOWS WITHIN THE           WILL NOT CREATE AN EROSION OR
                                             TOPSOIL RAKE THE SOIL SURFACE TO       CHANNEL REPAIR ANY SLUMPS, WHEEL       POLLUTION HAZARD.
      3. CLEAR THE LOCATION FOR THE          BREAK THE CRUST JUST BEFORE LAYING     TRACK DAMAGE OR LOSS OF
      CHANNEL, CLEARING ONLY WHAT IS         THE TURF                               FREEBOARD.                             3. GRADE THE AREA AND SMOOTH IT OUT
      NEEDED TO PROVIDE ACCESS FOR                                                                                         IN PREPARATION FOR STABILISATION.
      PERSONNEL AND CONSTRUCTION             4. DURING THE WARMER MONTHS,           2. ENSURE FILL MATERIAL OR SEDIMENT
      EQUIPMENT                              LIGHTLY IRRIGATE THE SOIL              IS NOT PARTIALLY BLOCKING THE          4. STABILISE THE AREA AS SPECIFIED IN
                                             IMMEDIATELY BEFORE LAYING THE TURF.    CHANNEL WHERE NECESSARY, REMOVE        THE APPROVED PLAN.
      4. REMOVE ROOTS, STUMPS, AND OTHER                                            ANY DEPOSITED MATERIAL TO ALLOW
      DEBRIS AND DISPOSE OF THEM             5. ENSURE THE TURF IS NOT LAID ON      FREE DRAINAGE.
      PROPERLY DO NOT USE DEBRIS TO          GRAVEL, HEAVILY COMPACTED SOILS, OR                                              600�m     Optional earth embankment
      BUILD ANY ASSOCIATED EMBANKMENTS.      SOILS THAT HAVE BEEN RECENTLY

                                                                                                                              1 1
                                             TREATED WITH HERBICIDES.                                             1000mm       �mm!   /
                                                                                                                                        to increase flow capacity
      5. EXCAVATE THE DIVERSION CHANNEL                                                                            (min)                and/or act as freeboard
      TO THE SPECIFIED SHAPE, ELEVATION      6. ENSURE THE TURF EXTENDS UP THE
      AND GRADIENT THE SIDES OF THE          SIDES OF THE DRAIN AT LEAST 100mm
      CHANNEL SHOULD BE NO STEEPER THAN      ABOVE THE ELEVATION OF THE CHANNEL      Direction
      A 2:1 (H:V) IF CONSTRUCTED IN EARTH,   INVERT, OR AT LEAST TO A SUFFICIENT
      UNLESS SPECIFICALLY DIRECTED WITHIN    ELEVATION TO FULLY CONTAIN
                                                                                     of inflow
      THE APPROVED PLANS.                    EXPECTED CHANNEL FLOW

   6. STABILISE THE CHANNEL AND BANKS        7. ON CHANNEL GRADIENTS OF 3:1(H:V)
   IMMEDIATELY UNLESS IT WILL OPERATE        OR STEEPER, OR IN SITUATIONS WHERE
   FOR LESS THAN 30 DAYS. IN EITHER          HIGH FLOW VELOCITIE$ (i.e. VELOCITY
   CASE, TEMPORARY EROSION                   >1.5m/s) ARE LIKELY WITHIN THE FIRST
   PROTECTION (MATTING, ROCK, ETC.)          TWO WEEK FOLLOWING PLACEMENT,
a: WILL BE REQUIRED AS SPECIFIED WITHIN      SECURE THE INDIVIDUAL TURF STRIPS
� THE APPROVED PLANS OR AS DIRECTED.
I
l"
                                             WITH WOODEN OR PLASTIC PEGS.            Figure 1 - Typical profile of diversion channel with bank
      7. ENSURE THE CHANNEL DISCHARGES       8. ENSURE THAT INTIMATE CONTACT IS

                                                                                                          I Dec-09 I Diversion Channels
                                                                                                 Drawn:   Date:
 �    TO A STABLE AREA                       ACHIEVED AND MAINTAINED BETWEEN
·�,
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