Attachment C - Stmwater Man Plan · MCU15/0016

 

 

RECOMMENDATIONS FOR ESTABLISHMENT & OPERATION:

PHASE OF ESTABLISHMENT:

The first 2 Years after construction are crucial for the performance of the VBFS.
***Ensure the right plant selection (refer "Healthy Waterways" for plant selection)
**During dry periods provide sufficient watering
“Perform regular weed removal
****Replace not established plants where required
OPERATIONAL PHASE:

e Perform routine inspections of the raingarden (VBFS) to identify any areas of obvious increased sediment deposition, scouring from
storm flows, rill erosion of the batters from lateral inflows and clogging

Perform routine inspections of the inflow systems in particular the grated drain and clean the grated drain regular from debris and litter
Perform routine inspections of the surface of the raingarden and clean from litter and gross pollutants

Remove sediment build ups in the raingarden

Repair any damage from vehicle traffic

Provide regular irrigation/watering during extended dry periods

Remove any invasive weeds at any time

Remove plants that have died and replace them

Perform regular pruning as to Landscape Architects schedule to encourage growth and healthy establishment of plants

Perform vegetation pest minotoring and control as to Landscape Architects schedule

RECOMMENDATION:

THE RAINGARDEN IS PROPOSED TO BE A STORMWATER TREATMENT DEVICE AS OPPOSED TO A NORMAL GARDEN
BED. WE RECOMMEND TO SET UP A SIGN EXPLAINING THE PURPOSE OF THE RAINGARDEN.

WIDTH AS SPECIFIED IN PLAN VEGETATED BIO RETENTION SYSTEM LENGTH AS SPECIFIED INPLAN = WIDTH AS SPECIFIED IN PLAN
Use for mulching: LUCERN, WOODCHIP OR EQUIVALENT.

 

       
       
   
   
   
     
     
   
   
   
   

NOTES:

1. Use LUCERN OR EQUIVALENT for mulching

2. Do not use organic Soils or soil fractions
for filter layer.

3. Provide a suitable irragation system required
for the establishment of the plants and for
use in extended dry periods. Irragation
system shall be supplied from the

harvesting tanks.

4. Do not use any geotextile or related
products between filter and transition or
between transition and drainage layers.

5. Geotextiles may be used in addition to the
impermeable concrete & block surrounds.

6. Provide flush out points for subsurface

drainage.

 

 

FILTER LAYER:

Clay 2-4% (<0,002mm)
Silt 48% (0.002-0.05mm)
Very Fine Sand = -10%(0.05-0.15mm)

Fine Sand 10-25% (0.15-0.25mm)
Med./Coarse Sand 60-70% (0.25-1.0mm)
Coarse Sand 7-10%(1.0-2.0mm)

TRANSITION LAYER:
Coarse Sand 100% 0.5-2 mm

 

 

 

 

 

 

DRAINAGE LAYER

O, OC Fine Gravel 100% 2-5 mm

 

 

 

 

 

   
         
     

 

 

 

 

 

 

Connect subsoil
drainage to stormwater
infrastructure as
specified in plan.

Provide PVC perforated pipe with
diameter as specified in plan.
Minimum 2 off.

 

VEGETATED BIO FILTER STRIP SOIL SPECIFICATION
(NOT TO SCALE)

 

 

NOTES:

1. Provide selected plants as to specification of
"Healthy Waterways” http://www.healthywaterways.org/

2. Provide "FOREBAY’ made of rocks and pebbles. For

scour protection. Refer detailed design for area.

MAINTENANCE PLAN

WATER SENSITIVE URBAN DESIGN TECHNICAL DESIGN GUIDELINES FOR SOUTH EAST
QUEENSLAND (Chapter 5, Item 5.6).

 

The maintenance of the bioretention basin elements involve:

e — Routine inspection of the bioretention basin profile to identify any areas of obvious increased sediment
deposition, scouring from storm flows, rill erosion of the batters from lateral inflows, damage to the profile
from vehicles and clogging of the bioretention basin (evident of "boggy" filter media surface).

e Routine inspection of inflows systems, overflow pits and under-drains to identify and clean any areas of
scour, litter build up and blockages.

e Removal of sediment where it is smothering the bioretention basin vegetation.

e Where a sediment forebay is adopted, removal of accumulated sediment.

Repairing any damage to the profile resulting from scour, rill erosions or vehicle damage by replacement of

appropriate fill (to match onsite soils) and revegetating.

Tilling of the bioretention basin surface, or removal of the surface layer, if there is evidence of clogging.

Regular watering/irrigation of vegetation until plants are established and actively growing.

Removal and management of invasive weeds (herbicides should not be used).

Removal of plants that have died and replacement with plants of equivilant size and species as detailed in

the plant schedule.

Pruning to remove dead or diseased vegetation material and to stimulate growth.

Vegetation pest monitoring and control.

Refer "Water by design" by HEALTHY WATERWAYS.

 

BIO RETENTION
BASIN

THIS BIO RETENTION BASIN REDUCES THE POLLUTION
OF OUR WATERWAYS BY REDUCING THE AMOUNT OF
HEAVY METALS, LITTER, SUSPENDED SOLIDS AND
NUTRIENTS DISCHARGED TO THE

PUMICESTONE PASSAGE.

 

 

 

EDUCATIONAL SIGNAGE LAYOUT

 

 

1800m? q Sig

 

 

 

ROOF

 

BIORETENTION FILTER & RAINGARDEN MAINTENANCE CHECKLIST

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BODY . :
CORPORATE NAME: DATE:
RESPONSIBILITY CENTRE . .
MANAGEMENT NAME: DATE:
OWNER NAME: DATE:
PROVIDE NAME AND DETAILS OF
MONTHLY CONSULTANT IF APPOINTED:
INSPECTION QUARTER
FREQUENCY 6—MONTHLY
DROUGHT
AFTER EVENT
INSPECTION ITEMS YES __|No ACTION REQUIRED

 

 

Overall appearance healthy?

 

Overall appearance clean?

 

Gross litter _on surface?

 

 

Sediment accumulation at inlet?

 

Sediment accumulation on pebble surface?

 

Sediment accumulation at pipe outlets?

 

Sediment accumulation in bypass chamber?

 

 

Erosion at forebay?

 

Erosion at overflow?

 

Any other erosion?

 

 

Damage of support structure?

 

Any other traffic damage present?

 

Damage to grates and lids?

 

 

Visual plant health ok?

 

Weeds apparent? Weeding required?

 

Watering required?

 

Irrigation functional?

 

Replanting required?

 

Mowing/slashing/pruning required?

 

 

Surface clogging visible?

 

Excess ponding evident?

 

Flushing required?

 

Point of discharge inspected (pit/headwall/swale/creek)?

 

 

 

 

OTHER
OBSERVATIONS

 

SIGNATURE & DATE:

 

 

 

1155m? 5
ee

DRIVEWAY

BIO RETENTION SYSTEM

 

 

 

 

RETENTION TANK

TREATMENT TRAIN

RECEIVING WATERWAYS

 

 

 

 

DISCLAIMER — ENSURE ORIGINAL SIZE DRAWING IS USED
FOR ASSESSMENT, TENDERING AND CONSTRUCTION.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[Amd Description Date
Issue Notes Date

For Development Approval] X 20-05-15

For Building Approval

For Tender

For Construction

As Constructed

 

E Hydraulic ::

 

\-

PO Box 181
Moffat Beach, QLD, 4551
email: [email protected]

PH: (07) 5491 4333 FX: (07) 5491 4233

contact: Reinhold Koenning MiEAust RPEQ No 7023

 

 

 

 

 

 

 

 

 

 

CLIENT :
| & L KIPPEN
ARCHITECT :
LL IAN GORTON DESIGN J
(PRoJect: 73 RENE STREET >
NOOSAVILLE
LIGHT INDUSTRIAL
DRAWING TITLE:
STORMWATER
QUALITY
MAINTENANCE
AND SPECIFICATIONS
Design] RH. checked] hb [Date | 20-05-15 | Dwg. No. ‘AMD.
SCALE : N/A on at u.no.] 4 of 4 2999-4 J

 

 

RPD:— LOT 1 SP 244573