Development Application Part 3 of 3 - Plans · OPW11/0320

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                                                                                                                                        SEDIMENT AND EROSION                                                                                                                                                        Ln
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                                                                                                                                           CONTROL DETAILS                                                                                                                                                                    En


                                                                                                                      FALL EROSION AND SEDIMENT IN ACCORDANCE WITH IN ACCORDANCE WITH
                                                                                                                         WITH MAROON BOOK MANUAL FOR EROSION AND SEDIMENT CONTROL


                                                                                                                        GEOTEXTILE            STAKES
                                                                                                                       FILTER FABRIC-   FTC                                 STAKES




           600mm (NOM) GAP
           BETWEEN SAND BAGS                                                                                                                                GEOTDOILE
           ACT AS SPILLWAY                                                                                                                                  FILTER FABRIC
               THREE LAYERS OF
               SANDBAGS WITH ENDS
               OVERLAPPED.
                                                                                                                                        GEOTEXTILE INLET FILTER
             DOWN STREAM GULLY PROTECTION DETAILS
                                         NOT TO SCALE                                                                  GEOTEXTILE INLET FILTER CONSTRUCTION NOTES
                                                                                                                       1.   FABRICATE A SEDIMENT BARRIER FROM GEOTEXTA.E.
                                                                                                                       2.    FOLLOW DETAIL FOR SEDIMENT FENCE FOR GEOFABRIC
                                                                                                                            INSTALLATION. REDUCE PICKET SPACINGS TO 1m CENTRES.
                                                         BURY THE TOP OF THE PLASTIC                                   3.    DO NOT COVER THE INLET WITH CEOTEXRLE UNLESS THE
                                                         IN TRENCH MIN 300mm DEEP.                                          DESIGN IS ADEOUATE TO ALLOW FOR ALL WATERS TO
                                                         STAPLE AT 150mm CENTRES.                                           BYPASS IT.
                                                         COMPACT SOIL OVER BLANKET




       OVERLAP-BURY UPPER END OF
   LOWER BLANKET AS IN A. OVERLAP
    END OF TOP BLANKET 300mm AND                                                                                                                                                                      KERB INLET PIT SEDIMENT BARRIER
                STAPLE AT 150 CRS.
                       FLOW

                                                                                                                                                                                            1.5m TIMBER STAKES
                                                                                                                                                                                            AT MAX 2.5m CENTRES
            CENTRELINE SECTION AT POINTS -B-                                      Unbound pavement material (gravel) to Grading
                                                                                                                                                                                                                                                                       SEDIMENT FENCES
                                                                                  B, Table 9 of QT Specification MRS1 1.05,
                                                                                  exclude material finer than sieve 2.36mm                                                                                                                                   Sediment Fence installed QC(oss th ontour
                                                                                                                                                                                     500mm TO                                                                - IwlcLxltaurDd concell oI of flaw sholIdCbe avoided

                                                                                                         Runoff from pod directed to sediment trap                                     600mm                                                                                                                             0
                                                                                                                                                                                                                               ON SOIL, 150mm a 100mm
                                                                                                                                                                                                                               TRENCH WITH COMPACTED                                                                     a
                                                                                                                                                                                                                               BACKFILL AND ON ROCK, SET                                                                 Cf
                                                                                                     TEMPORARY CONSTRUCTION ENTRY/EXff SEDIMENT TRAP                                                  SECTION DETAIL           INTO SURFACE CONCRETE
                                                                                                     Not to scale

     STAPLE BLANKETS                                                                                                                                       SET 300mm ABOVE GROUND
          AT GRID OF
         1m CENTRES


                                                                                                                                                                                                                                                           SEDIMENT FENCE CONSTRUCTION NOTES
                                                                                                                                                                                                                                                           1.    CONSTRUCTION SEDIMENT FENCES AS CLOSE AS
                                                                                                                                                                                                KERB INLET PIT SEDIMENT BARRIER                            POSSIBLE TO BEING PARALLEL TO THE CONTOURS OF THE
                                                                                                                                                                                                                                                           SITE. BUT WITH SMALL RETURNS. THE CATCHMENT AREA
                                                                                                                                                                                                CONSTRUCTION NOTES                                         SHOULD BE       SMALL ENOUGH TO OMIT WATER FLOW F
                                                                                                                                                                                                1.    FABRICATE A SLEEVE FROM GEOTEXDLE OR WIRE MESH       CONCENTRATED AT ONE POINT.
                                                                                                                                                                                                     LONGER THAN THE LENGTH OF THE INLET PIT AND FILL      2.    CUT A 150-mm DEEP TRENCH ALONG THE UPSLOPE
                                                                                               RUNOFF TO BE DIRECTED TO A SEDIMENT TRAP,
                                                                                                                                                                                                     WITH 25mm TO 50mm GRAVEL                              LINE OF THE FENCE FOR THE BOTTOM OF THE FABRIC TO
                                                                                               REFER STANDARD DRAWING D-0041.
                       CLEAN/DIRTY DIVERSION DRAINS                                                                                                                                             2.    FORM AN ELLIPTICAL CROSS-SECIRCUmON APPROX. 150mm    BE    ENTRENCHED.
                                                                                                                                                                                                     HIGH, 400mm WIDE.                                     3.    DRIVE TIMBER STAKES INTO GROUND AT 2.5m
                                                                                                              TEMPORARY ENTRY/EXIT                                                              3.    PLACE THE FILTER AT OPENING LEAVING AT LEAST         INTERVALS (MAX) AT THE DOWNSLOPE EDGE OF THE TRENCH.
                                                                                                                                                                                                     100mm BETWEEN KERB INLET AND SLEEVE. MAINTAIN         4.    FIX SELF-SUPPORTING GEOTEXTILE TO THE UPSLOPE
                                                                                                                                                                                                     OPENING WITH SPACER BLOCKS.                           SIDE OF THE P0515 ENSURING IT GOES TO THE BASE OF
DNERSION DRAIN CONSTRUCTION NOTES                                                                                                                                                               4.    FORM A SEAL WITH KERB TO PREVENT SEDIMENT            THE TRENCH. FIX THE GEOTEXTILE WITH WIRE RECOMMENDED
                                                                                               TEMPORARY ENTRt'/EXIT CONSTRUCTION NOTES                                                              BYPASS.                                                BY THE MANUFACTURER. THE USE OF SHADE CLOTH FOR
1. REMOVE ANY ROCKS. CLODS, STICKS OR GRASS FROM THE SURFACE BEFORE LAYING PLASTIC.                                                                                                                                                                        THIS PURPOSE IS NOT SATISFACTORY.
2. ENSURE THAT TOPSOIL IS AT LEAST 75mm DEEP.                                                  1. STRIP THE TOPSOIL, LEVEL THE SITE AND COMPACT THE SUBGRADE.                                   5.    SANDBAGS FILLED WITH GRAVEL CAN SUBSTITUTE FOR
                                                                                                                                                                                                                                                           5.    JOIN SECTIONS OF THE FABRIC AT A SUPPORT POST
3. ENSURE PLASTIC WILL BE CONTINUOUSLY IN CONTACT WITH TIE SOIL BY GRADING THE SURFACE         2. COVER THE AREA WITH NEEDLE-PUNCHED GEOTEXTILE.                                                     THE MESH OR GEOTEXTILE PROVIDED THEY ARE PLACED
                                                                                                                                                                                                                                                           WITH A 150mm OVERLAP.
    CAREFULLY FIRST.                                                                           3. CONSTRUCTION A 200mm THICK PAD OVER THE GEOTEXTILE USING ROAD BASE OR 30mm.                        SO THAT THEY FIRMLY ABUT EACH OTHER AND               6.    BACKFLL THE TRENCH OVER THE BASE OF THE FABRIC
4. LAY FABRIC IN 'SHINGLE FASHION'. WITH THE END OF EACH UPSTREAM ROLL OVERLAPPING THOSE       4. ENSURE THE STRUCTURE IS AT LEAST 15m LONG OR TO BUILDING ALIGNMENT AND AT                          SEDIMENT LADEN WATERS CANNOT PASS BETWEEN.            AND COMPACT IT THOROUGHLY OVER THE GEO1EXTILE
    DOWNSTREAM. ENSURE EACH ROLL IS ANCHORED PROPERLY AT ITS UPSLOPE END.                          LEAST 3m WIDE
5. ENSURE FULL WIDTH OF FLOW CHANNEL IS COVERED BY THE PLASTIC.                                5. WHERE SEDIMENT FENCE JOINS ONTO THE STABILISED ACCESS, CONSTRUCTION A HUMP OR
                                                                                                   GRATE IN THE STABILISED ACCESS TO DIVERT WATER TO THE SEDIMENT FENCE

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