Engineering Drawings

                                                                                                                                                                                                                                               Tread width: 0.250

                                                                                                                                                                                                                                                 Total rise: 1.450
                                                                                                                                                                                                              F. H. R.




                                                                                                                                                                                                                                                     Riser: 0.181
 BASIN PROTECTION:                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             NOTES:




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                                                                                                                                                                                 MBP 3




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 1.    BIO BASIN IS TO BE A SEDIMENT BASIN UNTIL ALL EARTHWORKS AND ROADS COMPLETED AND LOTS




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                                                                                                                                                                                                                                           Fire




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       ARE FULLY STABILIZED.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   1.       ALL BIORETENTION BASINS TO BE COVERED WITH A SACRIFICIAL LAYER OF GEOFABRIC,




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 2.    BASIN OUTLETS/INLETS, RETAINING WALLS, HDPE LINER AND SUBSOILS TO BE CONSTRUCTED —                                                                                                                                                  Stairs                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       TOPSOIL AND TURF UNTIL PRACTICAL COMPLETION OF CIVIL WORKS OR UNTIL 90% OF




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       HOLD POINT FOR INSPECTION BY RPEQ AND BCC (IF NOTED IN PRESTART MEETING).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        BUILDING WORKS WITHIN THE LOTS ARE COMPLETE, WHICH EVER IS LATER. AT THIS POINT




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 3.    THE BASIN DRAINAGE LAYERS AND FILTER IS TO BE PLACED AND TEMPORARILY PROTECTED USING                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             THE TEMPORARY COVER IS TO BE REMOVED AND REPLACED WITH LANDSCAPED PLANTS AS




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       GEOTEXTILE PLACED OVER FILTER WITH 75mm TOPSOIL AND TURFED. BASIN BATTERS ARE TO BE                                                                                                                                                                                               D.P
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        PER NOTE 2. PLANTS ARE THEN TO BE MAINTAINED FOR A PERIOD OF 3 YEARS BEFORE
       PLANTED                                                                                                                                                                                                                                                                                                                          1                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               BEING ACCEPTED 'OFF-MAINTENANCE.'
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 4.    IN ACCORDANCE WITH LANDSCAPE PLANS.                                                                                                                     C
 5.    BASIN TO BE LEFT IN PROTECTED STATE FOR 24months (MAINTENANCE PERIOD FOR ALL BCC OWNED                                                                D01                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               2.       FUTURE VEGETATION TO COMPLY WITH THE REQUIREMENTS OF APPENDIX A OF 'HEALTHY
       BASINS) TO ALLOW SUBSTANTIAL AMOUNT OF BUILDING WORK TO BE COMPLETED IN THE                                                                                                                                              IL 5.70                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 WATERWAYS WATER SENSITIVE URBAN DESIGN' TO LOAMY SOILS. REFER LANDSCAPE
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       CATCHMENT. WHEN 80% OF BUILDING WORK IN CATCHMENT IS COMPLETED THE MINIMUM                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            2m DUMP ROCK SCOUR                                                         ARCHITECTS DETAILS
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       MAINTENANCE PERIOD CAN BE REDUCED TO 12MONTHS UPON AGREEMENT BY BCC OFFICERS.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         PROTECTION (d50=0.2)




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                                                                                                                                                                                                                               MANHOLE




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 6.    PRIOR TO OFF MAINTENANCE INSPECTION THE PROTECTIVE LAYER/S ARE TO BE REMOVED AND A                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      3.       CLEANOUT POINTS (INCLUDING CONCRETE SURROUND AND END CAP) TO BE PROVIDED IN




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                                                                                                                                                                                                                                ACCESS




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       MINIMUM OF THREE (3) IN-SITU INFILTRATION TESTS ARE PROVIDED THAT DEMONSTRATE THAT THE                                                                  B                                   IL 5.70                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              ACCORDANCE WITH BRISBANE CITY COUNCIL DRAFT STANDARD DRAWING UMS 153 WITH




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       HYDRAULIC CONDUCTIVITY MEETS OR EXCEEDS THE DESIGN HYDRAULIC CONDUCTIVITY (TYPICALLY                                                                  D01                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        THE SECTION OF SUB-SOIL DRAIN FROM THE BEND TO THE SURFACE TO BE PROVIDED AS




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       >120MM/H).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       AN UNSLOTTED/UNPERFORATED PIPE.




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                                                                                                                                                                                                                               MANHOLE




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 7.    UPON SUCCESSFUL HYDRAULIC CONDUCTIVITY TESTS AND OFF-MAINTENANCE INSPECTION THE




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                                                                                                                                                                                                                                ACCESS




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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               4.       REFER DRAWING WQ02 FOR BIO BASIN TYPICAL SECTIONS.




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       FILTER IS TO BE PLANTED OUT IN ACCORDANCE WITH THE APPROVED LANDSCAPE PLANS. A




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       FURTHER 12 MONTH MAINTENANCE SECURITY TO BE APPLIED FOR TO FILTER LANDSCAPING WORKS




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       ONLY.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   FLUSH POINTS TO HEAD OF LINE




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                                                                                                                                                                                                               RL 5.70                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         (TYPICAL)




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       FILTER MATERIAL GRADING:




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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           100mm SLOTTED UPVC SUBSOIL DRAINAGE




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       FILTER MATERIAL TO HAVE HYDRAULIC CONDUCTIVITY OF 180mm/hr




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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           [email protected] Crts AND GRADED @ MIN 0.5%.




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       UNDER DRAINAGE MATERIAL IS TO HAVE A MINIMUM HYDRAULIC CONDUCTIVITY OF 5000mm/hr. THE




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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           CAPPED UPVC FLUSH POINTS TO BE




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       GRADING OF THE UNDER DRAINAGE GRAVEL, TRANSITION LAYER AND FILTER MEDIA SHALL COMPLY




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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           INSTALLED TO CHANGE OF DIRECTIONS,




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       WITH THE FOLLOWING CRITERIA:-




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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           HEADS OF ALL SUBSOIL DRAINAGE PIPES




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             D15 (TRANSITION LAYER) ≤ 5xD85 (FILTER MEDIA)




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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           AND @ 30m (MAX) CTS. (TYPICAL)




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             D15 (DRAINAGE LAYER) ≤ 5xD85 (TRANSITION LAYER)




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