Attachment 8 - Interim Stormwater Management Plan - TOPO · 132005.638.06

20 | DRAINAGE AND WATER QUALITY DRAWINGS


[OCR of page images]
 

Extended detention depth. 0-300.
Typically 300. Refer project drawings 7

ye . r Filter cloth fixed to
Field inlet Type 1 without perimeter of pit.

concrete apron as per IPWEA Refer note 10
Standard Drawings DS—050

   
 
   
   
 
 

Provide locking function or
Vegetated batter. secure cap with screws
Slope varies with

design. Refer note 8

Vegetated surface
Refer note 1

Mulch layer — 50 — 70 Refer note 1

  
 
 

Extend approx 150 above
biorentention system surface

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

i Bioretention finished surface level.
Underarain Refer project drawings ond notes 1 & 3 NX
/ Refer note 7 ae ~— filter media 500 - 1000 (min 400 or ——> V
Impermeable liner to 300 be 100 where trees specified min 700) Ko
extend 500 up batter 4 Refer note 2 a } Underdrain cleanout and
under topsoil and = Fansition foyer. Depth varies with ~ a connector cleanout at head of
i < ign. ree
pinned to batter gE Hsia eer gpth varies with Nea pipes. Refer note 9
. design. 135° bend
wg Ft if r Refer note 4
Outlet Pioe 254 Underdrain noe \
sealed into pit. Impermeable liner. 135° bend
Screw cap for Refer note 5 Refer note 6
draining/maintenance to remain

 

. . . “ Mass concrete support
in place during normal operation.

NOTES:

1. Bioretention system surface. Surface level is top of filter media. Surface to be mulched and planted as per project drawings and the ‘Bioretention Technical Design Guidelines’
(Water by Design).

2. Filter media specification shall be in accordance with the ‘Adoption guidelines for Stormwater Biofiltration Systems (CRC for water sensitive cities) and the Bioretention Technical
Design Guidelines (Water by Design). Bioretention hydraulic conductivity shall be in accordance with Practice Note 1: in situ Measurement of Hydraulic Conductivity’ (FAWB). The
number of samples to be tested shall be in accordance with the ‘Construction and Establishment Guidelines — Swales, Bioretention Systems and Wetlands’ (Water by Design).

3. Construction tolerances shall be in accordance with the ’Construction and Establishment Guidelines —Swales, Bioretention Systems and Wetlands’ (Water by Design)

4. Transition layer and drainage layer depths vary with design. Depths and specification to be in accordance with project drawings and the ‘Bioretention Technical Design Guidelines’
(Water by Design)

5. Underdrain. Slotted rigid pipe laid flat. Refer to project drawings for diameter and pipe invert. Pipe should not be installed with a filter sock surrounding pipe. Underdrain pipes
shall be sealed into pits using grout or other approved watertight seal.

6. Impermeable liner. Compacted clay or synthetic liner with permeability of no greater than 1 x 10-%m/s. impermeable liner to be sealed around all protrusions. Synthetic liners to
be installed and sealed in accordance with manufacturers requirements. Impermeable liner as per project drawings ond 'Bioretention Technical Design Guidelines’ (Water by Design)

7. Underdrain outlet riser establishes max saturated zone water level. Underdrain outlet riser as per project drawings and ‘Bioretention Technical Design Guidelines’ (Water by Design)
8. Vegetated batter. Slope and planting to be in accordance with project drawings and ’Bioretention Technical Design Guidelines’ (Water by Design).

9. Inspection/cleanout point. Vertical solid pipe section attached to the end of each underdrain in accordance with project drawings and the ‘Bioretention Technical Design
Guidelines’ (Water by Design)

10. Filter cloth to be fixed to perimeter of pit to avoid runnelling of water between pit and soil interface. Begin filter cloth 100 above surface. Extend to 100 below surface. Continue
300 horizontally into filter media.

11. For general design and construction notes refer to DS-078

12. All dimensions in millimetres unless otherwise noted.
These drawings have been developed in consultation between the participating Councils.
BEFORE USE, the user shall confirm that the drawing has been adopted by the appropriate Council.

INSTITUTE OF PUBLIC WORKS ENGINEERING AUSTRALASIA BIORETENTION DRAINAGE PROFILE - TYPE 1
STANDARD DRAWINGS SATURATED ZONE — UNCONSTRAINED

 

 

 

 

DS-070

 

 

ap]
PTT TTT

11775 | ORIGINAL ISSUE
TAE, February, 2076 _REVSIONS, inal Tssue

 

 

 

 

 

 

 

 

 

 

 

 

20 | DRAINAGE AND WATER QUALITY DRAWINGS