Attachment G - Stormwater Quality Management plan

 

 

  
     
  

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Varies 1200 — 1600—-)_~-Adjacent surface treatment as specified NOTES:
f Z ! Kerb and channel -
LI Modular soil cell 1. For general design and construction notes refer to DS—O78.
4 ; Tree pit kerb inlet 2. WSUD kerb shown is only suitable for street tree pits and small raingardens. Larger
systems may need specific inlet design or multiple inlets.
J | scour sores 3. Where no parking lane exists, RHS kerb inlet may be replaced by an open kerb cut.
irect flow into pi
4 | (optional) i. 4. Ensure tree pit drainage is connected to stormwater system to avoid flooding the tree.
Tree growth optiona ;
A rings in grate—4 \y | A 5. Tree pits are to be located upstream of gully pits.
| _ NY | _ | 6. Street tree to be appropriate for traffic sight lines.
Varies cA YY | 7. Filter media specification shall be in accordance with the ‘Guidelines for Soil filter Media in
1200 — 1600 a” Z Ly | os Bioretention systems’ (FAWB) and the Bioretention Technical Design Guidelines (Water by
g | 3 Design). Bioretention hydraulic conductivity shall be in accordance with ‘Practice Note 1:
| “ InSitu Measurement of Hydraulic Conductivity’ (FAWB). The number of samples to be tested
; | shall be in accordance with the ’Construction and Establishment Guidelines —Swales,
v obs | Bioretention Systems and Wetlands’ (Water by Design).
a “ fo 8. Transition layer and drainage layer specifications to be in accordance with Bioretention
J rN a Ss Technical Design Guidelines (Water by Design.
\ NZ ; ~ 2
4 roy 100 dia. Slotted y = 3 9. All dimensions in millimetres unless specified otherwise.
at pyc pipe os
| | aa
J an A
Trimmer bars at all tree 225 Under—drainage, \—Tree grate
pit lid corners PLAN connect to nearest
— adjacent gully pit
Tree grate and Nominal face of kerb
connection Ve
Tree, refer note 6 ° feo kerb invert
~ Void — no fill. or Dee
Optional 50 deep layer of 18mm 50— pe A ty tytity
gravel screenings or mulch b a ae
Tree grate Tree pit kerb inlet (refer to eee eee
Subsoil drain cleanout — (non slotted) and detail) Depressed kerb as—

 

 

connector cleanouts at head of under—drain > Kerb and Channel per long section

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

: TREE PIT KERB INLET TYPICAL SECTION
<sN mae Pnararanee
ooh ; 3 x galvanised rhs 150 x 100 graded
RARE | Concrete edge 150x870 at 1:20 minimum away from kerb .
C te edoe 150x300 7 Bo Sot adjacent to road ;— Depress kerb invert by 50 transition
onere g ‘ CRE a Z . . to kerb invert level at both ends
. , Se DYY* Filter media 570 deep refer note 8
Transition Layer. Depth varies QA “ ZG Zo Modular soil cell system (providing Standard kerb and
with design. Refer note 8 PEO pe at least 90% free soil volume, with channel_ profile 30 300
KR?¥£ ~ - SS¥ positive vertical and lateral Top of kerb
100 KK‘ RY interlocks) installed as per (90 iy J
ROL ee es oz Z Y monufacturers instructions, Extent = { } | 5
3H By Bs Vets Poh HIS Pos ods Yas  s|* ‘ of required area depends upon A, : < fg 4 2g
Drainage layer. Depth varies DUG CALI LRA IEEE IRE LEE tree species and local conditions “—
“er note * ° KELLER SK sae and constraints. Can extend under
Install slotted pipe and —=——Varies 1200 — 160 adjacent path
connect to adjacent pully pit These drawings have been developed in consultation between the participating Councils. TREE PIT KERB INLET ELEVATION
SECTION A-A BEFORE USE, the user shall confirm that the drawing has been adopted by the appropriate Council.

 

 

 

INSTITUTE OF PUBLIC WORKS ENGINEERING AUSTRALASIA

 

BIORETENTION STREET TREE DS—077

 

 

STANDARD DRAWINGS

 

 

 

 

 

 

 

 

RV. DATE February, 2016 REVISIONS Original Issue

 

 

TIT T I