Amended Plans_Rev D

 

RUNOFF

; FORMED TOP WIDTH \

 

 

    
   
  

 

DISPERSIVE SUBSOIL TO BE TREATED
WITH LIME OR GYPSUM TO ACID
INVESTIGATION REPORT

 

150 mm (MIN)

 

NON-DISPERSIVE SUBSOIL

 

 

 

 

 

(b) TRIANGULAR V-DRAIN WITH DOWN-SLOPE BANK
CONSTRUCTED DIMENSIONS OF TRIANGULAR V-DRAINS
DRAIN TYPE FORMED TOP WIDTH WITH OR FORMED DEPTH WITH OR
WITHOUT BANK WITHOUT BANK
Type-AV 2.0m 0.30 m
Type-BV 2.7m 0.45 m
Type-CV 3.9m 0.65 m

 

 

 

 

 

CATCH DRAINS - CD

fo POND SURFACE AREA (As)

     
   
 

 

NOTES:

MATERIALS:

ROCK: 150 TO 300mm EQUIVALENT DIAMETER, HARD, EROSION RESISTANT
ROCK.

SANDBAGS: GEOTEXTILE BAGS (WOVEN SYNTHETIC , OR NON-WOVEN
BIODEGRADABLE) FILLED WITH CLEAN COURSE SAND, CLEAN AGGREGATE,
OR COMPOST.

INSTALLATION (ROCK CHECK DAM):

1. REFER TO APPROVED PLANS FOR LOCATION AND INSTALLATION
DETAILS. IF THERE ARE QUESTIONS OR PROBLEMS WITH THE LOCATION
OR METHOD OF INSTALLATION CONTACT THE ENGINEER OR
RESPONSIBLE ON-SITE OFFICER FOR ASSISTANCE.

2. PRIOR TO PLACEMENT OF THE SEDIMENT TRAP, ENSURE THE DRAINAGE
CHANNEL IS DEEP ENOUGH TO PREVENT WATER BEING UNSAFELY
DIVERTED OUT OF THE DRAIN ONCE THE CHECK DAMS ARE INSTALLED.

3. LOCATE EACH ROCK CHECK DAM AS DIRECTED WITHIN THE APPROVED
PLANS, OR OTHERWISE AT SUCH A SPACING TO ACHIEVE THE REQUIRED
SEDIMENT TRAPPING OUTCOMES.

4. IF THE CHECK DAMS ARE ALSO BEING USED TO CONTROL EROSION
WITHIN THE DRAINAGE CHANNEL, THEN LOCATE EACH SUCCESSIVE
CHECK DAM SUCH THAT THE CREST OF THE IMMEDIATE DOWNSTREAM
DAM IS LEVEL WITH THE CHANNEL INVERT AT THE IMMEDIATE
UPSTREAM CHECK DAM.

5. CONSTRUCT EACH CHECK DAM TO THE DIMENSION AND PROFILE
SHOWN WITHIN THE APPROVED PLANS.

6. WHERE SPECIFIED, THE CHECK DAMS MUST BE CONSTRUCTED ON A
SHEET OF GEOTEXTILE FABRIC USED AS A DOWNSTREAM SPLASH PAD.

7. EACH CHECK DAM MUST BE EXTENDED UP THE CHANNEL BANK (WHERE

PRACTICABLE) TO AN ELEVATION AT LEAST 150mm ABOVE THE CREST

POND SURFACE AREA (As)

 

FIGURE 1 - PLACEMENT
OF ROCK FILTER DAM

INSTALLATION (COMPOST-FILLED SOCKS):

1. REFER TO APPROVED PLANS FOR LOCATION AND INSTALLATION
DETAILS. IF THERE ARE QUESTIONS OR PROBLEMS WITH THE LOCATION
OR METHOD OF INSTALLATION CONTACT THE ENGINEER OR
RESPONSIBLE ON-SITE OFFICER FOR ASSISTANCE.

2. PRIOR TO PLACEMENT OF THE SEDIMENT TRAP, ENSURE THE DRAINAGE
CHANNEL IS DEEP ENOUGH TO PREVENT WATER BEING UNSAFELY
DIVERTED OUT OF THE DRAIN ONCE THE CHECK DAMS ARE INSTALLED.

3. LOCATE EACH SOCK AS DIRECTED WITHIN THE APPROVED PLANS, OR
OTHERWISE AT SUCH A SPACING TO ACHIEVE THE REQUIRED SEDIMENT
TRAPPING OUTCOMES.

4. PLACE EACH SOCK TO THE LINES AND PROFILE SHOWN IN THE
APPROVED PLAN OR AS DIRECTED BY THE SITE SUPERVISOR.

5. ENSURE EACH SOCK EXTENDS UP THE CHANNEL BANKS (WHERE
PRACTICAL) TO A LEVEL AT LEAST 100mm ABOVE THE CREST LEVEL OF
THE CHECK DAM.

MAINTENANCE:

1. INSPECT EACH CHECK DAM AND THE DRAINAGE CHANNEL AT LEAST
WEEKLY AND AFTER RUNOFF PRODUCING RAINFALL.

2. CORRECT ALL DAMAGE IMMEDIATELY. IF SIGNIFICANT EROSION

OCCURS BETWEEN AND OF THE CHECK DAMS, THEN CHECK THE

SPACING OF THE DAMS AND WHERE NECESSARY INSTALL

INTERMEDIATE CHECK DAMS OR A SUITABLE CHANNEL LINER.

CHECK FOR DISPLACEMENT OF THE CHECK DAMS.

4. CHECK FOR SOIL SCOUR AROUND THE ENDS OF EACH CHECK DAM. IF
SUCH EROSION IS OCCURRING, CONSIDER EXTENDING THE WIDTH OF
THE CHECK DAM TO AVOID SUCH PROBLEMS.

ww

 

INFLOW

——-« DRAIN

ZA

CHANNEL GRADE
LESS THAN 1% FOR
THE LAST 6m

   
    
  

    

SILL AT 0%
OPTIONAL EARTH BANK GRADE ieee
TO CONTROL FLOW AS
REQUIRED
S>=—

FLOW DIVERSION BANK

STABLE, WELL-VEGETATED, SHEET FLOW
DISPOSAL AREA - NOT FILL

SSeS este

(a) TYPICAL LAYOUT OF LEVEL SPREADER

 

FABRIC USED TO STABILISE
NEWLY FORMED AND
TEMPORARY STRUCTURES

AE

OUTLET SILL

| VARIABLE ALONG LENGTH OF SILL \

 

  

 

   
    

 

150mm
(MIN)

 

FABRIC BURIED
150mm (MIN)

(b) TYPICAL PROFILE OF THE THE OUTLET WEIR

 

NOTES: 2.

INSTALLATION:

1. REFER TO APPROVED PLANS FOR LOCATION, 3
DIMENSIONS AND CONSTRUCTION DETAILS. IF THERE
ARE QUESTIONS OR PROBLEMS WITH THE LOCATION,
DIMENSIONS OR METHOD OF INSTALLATION CONTACT
5. IF SEVERE SOIL EROSION OCCURS EITHER UNDER OR AROUND THE THE ENGINEER OR RESPONSIBLE ON SITE OFFICER FOR
CHECK DAMS, THEN SEEK EXPERT ADVICE ON AN ALTERNATIVE ASSISTANCE.
TREATMENT MEASURE. 2. WHEREVER PRACTICAL, LOCATE THE LEVEL S.
6. DE-SILT SEDIMENT TRAP IF SEDIMENT LEVEL EXCEEDS 1/3 THE CREST SPREADER ON UNDISTURBED, STABLE SOIL.
HEIGHT. 3. ENSURE FLOW DISCHARGING FROM THE LEVEL

7. DISPOSE OF COLLECTED SEDIMENT IN A SUITABLE MANNER THAT WILL
NOT CAUSE AN EROSION OR POLLUTION HAZARD.

REMOVAL:
1. WHEN CONSTRUCTION WORK WITHIN THE DRAINAGE AREA ABOVE THE 4.
CHECK DAMS HAS BEEN COMPLETED AND DISTURBED AREAS
SUFFICIENTLY STABILISED TO RESTRAIN EROSION, THE DAMS MUST BE
REMOVED, UNLESS THE SEDIMENT TRAPS ARE TO REMAIN AS A
PERMANENT FEATURE.
2. REMOVE COLLECTED SEDIMENT AND DISPOSE OF IN A SUITABLE
MANNER THAT WILL NOT CAUSE AN EROSION OR POLLUTION HAZARD.
3. REMOVE AND APPROPRIATELY DISPOSE OF ALL MATERIALS INCLUDING
ANY GEOTEXTILE FABRIC.
4. STABILISE THE DISTURBED CHANNEL WITH A LINING OF FABRIC AND 5.
ROCK OR ESTABLISH VEGETATION AS APPROPRIATE.

SPREADER WILL DISPERSE ACROSS A PROPERLY 6.
STABILISED SLOPE NOT EXCEEDING 10:1 (H:V) AND
SUFFICIENTLY EVEN IN GRADE ACROSS THE SLOPE TO

AVOID CONCENTRATING THE OUTFLOW. 7.
THE OUTLET SILL OF THE SPREADER SHOULD BE
PROTECTED WITH EROSION CONTROL MATTING TO
PREVENT EROSION DURING THE ESTABLISHMENT OF
VEGETATION. THE MATTING SHOULD BE A MINIMUM OF
1200mm WIDE EXTENDING AT LEAST 300mm
UPSTREAM OF THE EDGE OF THE OUTLET CREST AND
BURIED AT LEAST 150mm IN A VERTICAL TRENCH. THE
DOWNSTREAM EDGE SHOULD BE SECURELY HELD IN
PLACE WITH WIRE STAPLE AT LEAST 150mm LONG.
ENSURE THAT THE OUTLET SILL (CREST) IS LEVEL
FOR THE SPECIFIED LENGTH.

6. IMMEDIATELY AFTER CONSTRUCTION, TURF, OR SEED 2.
AND MULCH WHERE APPROPRIATE, THE LEVEL
SPREADER.
3.

MAINTENANCE:

1. INSPECT THE LEVEL SPREADER AFTER EVERY
RAINFALL EVENT UNTIL VEGETATION IS S.
ESTABLISHED.

AFTER ESTABLISHMENT OF VEGETATION OVER THE
LEVEL SPREADER, INSPECTIONS SHOULD BE MADE ON
A REGULAR BASIS AND AFTER RUN OFF PRODUCING
RAINFALL.

ENSURE THAT THERE IS NO SOIL EROSION AND THAT
SEDIMENT DEPOSITION IS NOT CAUSING THE
CONCENTRATION OF FLOW.

ENSURE THAT THERE IS NO SOIL EROSION OR
CHANNEL DAMAGE UPSTREAM OF THE LEVEL
SPREADER, OR SOIL EROSION OR VEGETATION
DAMAGE DOWNSTREAM OF THE LEVEL SPREADER..
INVESTIGATE THE SOURCE OF ANY EXCESSIVE
SEDIMENTATION.

MAINTAIN GRASS IN A HEALTH CONDITION WITH NO
LESS THAN 90% COVER UNLESS CURRENT WEATHER
CONDITIONS REQUIRE OTHERWISE.

GRASS HEIGHT SHOULD BE MAINTAINED AT A
MINIMUM 50mm BLADE LENGTH WITHIN THE LEVEL
SPREADER AND DOWNSTREAM DISCHARGE AREA,
AND A MAXIMUM BLADE LENGTH NO GREATER THE
ADJACENT GRASSES.

REMOVAL:

TEMPORARY LEVEL SPREADERS SHOULD BE
DECOMMISSIONED ONLY AFTER AN ALTERNATIVE
STABLE OUTLET IS OPERATIONAL, OR WHEN THE
INFLOW CHANNEL IS DECOMMISSIONED.

REMOVE COLLECTED AND DISPOSE OF IN A SUITABLE
MANNER THAT WILL NOT CAUSE AN EROSION OR
POLLUTION HAZARD.

REMOVE AND APPROPRIATELY DISPOSE OF ANY
EXPOSED GEOTEXTILE.

GRADE THE AREA AND SMOOTH IT OUT IN
PREPARATION FOR STABILISATION.

STABILISE THE AREA AS SPECIFIED ON THE
APPROVED PLANS.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEVEL OF THE DAM. ROCK FILTER DAM - RCD LEVEL SPREADERS - LS
Associated Job Nos _Survey Dato Scales CLIENT 3 voIcT 31 OVERLANDER AVE, COOROY QLD 4563 |cource
oriz. RAI )L EY
D | RESPONSE TO INFO REQUEST 07.02.24 potum| CONSULTING EROSION & SEDIMENT CONTROL DETAILS | NOOSA SHIRE COUNCIL
Auxiliary Drg Nos|Horiz. |  MGA94 ASSOCIATED CONSULTANTS
C | AMENDED DRIVEWAY WIDTH 23.11.23 ne | cones 1° 3 6 9m SHEET 2 OF 2 —
B | ISSUE FOR USE 13.10.23 Height | >) 409.187 —S——_ 1750 @Al © ABN 84 639 195 092 STATUS ob _No. -
A | ISSUE FOR REVIEW 02.10.23 Datum PIKKI ST JARO BAULEKA SIGNATURE ISSUE FOR USE Contract No. -
wa a. Signatory: — RPEQ Full Name, Eng. Area and RPEQ No. or Survey] oneams Dimensions shown in metres MAROOCHYDORE BC, QLD 4558 RPEQ #20695 _—— | DRAWN DESIGNED DATE .
Revisions /Descriptions — Full Name and Position Title Date Books | SAS * RAMS fF except where shown otherwise +61 423 415 419 CPEng aa QT QT 23 11 23 Drawing No. C252 D
[email protected] | DATE: oll. Series Number 8 of 14