Conveyance Swale/Bioretention Swale

• Asset ID

• Conducted on

  Date

• Audit conducted by

  Select Leah Strauch Sophie Thomson Enter name

  • Leah Strauch
  • Sophie Thomson
  • Enter name

• Name

• Locality

  Select Balnarring Baxter Bittern Dromana Hastings Mornington Mt Eliza Mt Martha Portsea Rosebud Rye Safety Beach Somerville Sorrento Tyabb OTHER

  • Balnarring
  • Baxter
  • Bittern
  • Dromana
  • Hastings
  • Mornington
  • Mt Eliza
  • Mt Martha
  • Portsea
  • Rosebud
  • Rye
  • Safety Beach
  • Somerville
  • Sorrento
  • Tyabb
  • OTHER
• Address
  Address

• Control

  Council

  Melbourne Water

• Conditions

  Dry ground conditions

  Wet ground conditions

• Weather

  Select Sunny Overcast Rain Heavy Rain Light Windy Sunny and windy Rain and windy

  • Sunny
  • Overcast
  • Rain Heavy
  • Rain Light
  • Windy
  • Sunny and windy
  • Rain and windy

• Date of last rainfall

  Date

• Photo of entire asset & surroundings

  Media

• Asset function

• Asset Function: (a general description)
  - location eg. kerbside, median
  - catchment
  - key features eg, concrete apron to assist in sediment removal
  - predominant plant species
  - EED
  - current condition

• Type of catchment

• Type of catchment:
  eg. pavement only, grassed, garden beds, residential, industrial, other

• Location of swale?

• Traffic conditions?

  High (eg. main road)

  Medium (eg. car parks and collector roads)

  Low traffic (eg. residential street)

• Detention depth

• Slope

• Is the swale free from any unusual odours or substances?

  Yes

  No

  N/A

• Generally, does the swale appear free from any trampling or vandalism?

  Yes

  No

  N/A

2.1 Structures

• Fencing

  Yes

  No

  N/A

• Input description of general condition above

• Steel

• Steel - Rating

• Timber

• Timber - Rating

• Other

• Rating

• Edges

  Yes

  No

  N/A

• Input description of general condition above

• Concrete

• Concrete - Rating

• Timber

• Timber - Rating

• Steel

• Steel - Rating

• Bollards

  Yes

  No

  N/A

• Input description of general condition above

• Timber

• Timber - Rating

• Steel

• Steel - Rating

• Other

  Yes

  No

  N/A

• Material and general condition

• Concrete

• Concrete - Rating

• Timber

• Timber - Rating

• Steel

• Steel - Rating

• Other material

• Rating

• Other material

• Rating

• Other material

• Rating

2.2 Surfaces

• Road

  Yes

  No

  N/A

• Asphalt

• Asphalt - Rating

• Footpath

  Yes

  No

  N/A

• Concrete

• Concrete - Rating

• Aggregate footpath

• Aggregate footpath - Rating

• Other

• Rating

• Other

  Yes

  No

  N/A

• Material and general condition

3.1 Inlet

• Can the inlet be located?

  Yes

  No

  N/A

• Include number of inlets, and photographs of each one

• Concrete

• Concrete - Rating

• Timber

• Timber - Rating

• Other material

• Material

• Rating

• Is the structure obstructed or blocked?

  Yes

  No

  N/A

• Input photos and free text details. If multiple inlets are present, record % blockage of worst case.

• % blockage (100% = completely blocked)

• Is there a dedicated sediment forebay/s?

  Yes

  No

  N/A

• Input details and photographs

3.2 Outlet

• Can the outlet be located?

  Yes

  No

  N/A

• Include overall condition and photographs under details

• Concrete

• Concrete - Rating

• Steel

• Steel - Rating

• Composite Fiberglass

• Fiberglass composite - Rating

• Other material

• Material

• Rating

• Is the structure obstructed or blocked?

  Yes

  No

  N/A

• Input photos and details

• % blockage

3.3 Overflow

• Can an overflow be located?

  Yes

  No

  N/A

• Other material

• Material

• Rating

• Include overflow description (eg. inclined grated pit)

• Concrete

• Concrete - Rating

• Steel

• Steel - Rating

• Is the structure obstructed or blocked?

  Yes

  No

  N/A

• Input photos and free text details

• % blockage

3.4 Other components

• Are checkdams present?

  Yes

  No

  N/A

• Include description of check dams

• Are crossing present along the swale?

  Yes

  No

  N/A

• Input details: type of crossing? (at grade or elevated), how many etc. and general condition as well as rating materials below

• Concrete

• Concrete - Rating

• Timber

• Timber - Rating

• Other

• Rating

4.1 Surface conditions

• Gross pollutants

  Yes

  No

  N/A

• Add description of pollutants

• Gross pollutants per m2?

• Leaf litter

  Yes

  No

  N/A

• Leaf litter coverage? (percent)

4.2 Filtration

• Is the swale a bio-swale?

  Yes

  No

  N/A

• Include details of filter media

• Approximate filter area

• Is there mulch present?

  Yes

  No

  N/A

• Input details including distribution, bare patches, type of mulch etc.

• Did hydraulic conductivity testing take place?

  Yes

  No

  N/A

• Apparent hydraulic conductivity

• Was testing completed on proximate asset?

  Yes

  No

  N/A

• Asset ID

• Apparent hydraulic conductivity

4.2 Erosion

• Is there evidence of soil and/or sand being washed out?

  Yes

  No

  N/A

• Include details of location including photographs

• Erosion of base of swale?

  Yes

  No

  N/A

• Surface scour, depression, preferential flows etc.

• Erosion of batter slopes?

  Yes

  No

  N/A

• Surface scour, depression, preferential flows etc.

4.3 Sediment accumulation

• Is there evidence of sediment accumulation on swale base?

  Yes

  No

  N/A

• Is there evidence of sediment accumulation on swale batters?

  Yes

  No

  N/A

• Is surface ponding or boggy conditions apparent?

  Yes

  No

• eg. signs of moss or sediment crusting

• Maintenance inspection results from the past 12 months should be consulted to identify ongoing concerns with
  filtration media and vegetation health

• Previous inspections:

5.1 Plants

• Does the swale contain grass?

  Yes

  No

  N/A

• include details of grass coverage including any bare patches, % coverage, length of grass

• Is there plants present?

  Yes

  No

  N/A

• Include details of species as well as location (eg. near edges of swale). Comment on general plant health overall and areas where plant growth may be struggling (eg. at inlets) as well as recommendations for maintenance.

• Is there a tree in the swale?

  Yes

  No

  N/A

• Include details:
  Does tree appear to be in good condition? (evidence of being maintained, removing dead leaves, foliage looks healthy, insect damage etc.)

5.2 Algal and moss growth

• Is the algal growth?

  Yes

  No

  N/A

• Input details of coverage and location

• % coverage

• Is there moss growth?

  Yes

  No

  N/A

• % coverage

• Input details of coverage and location

5.3 Weeds

• Is there weeds present?

  Yes

  No

  N/A

• Input description of weeds and maintenance recommendations

• % coverage

6.1 Asset works priority

• Visibility

  High

  Medium

  Low

  N/A

• Examples of high visibility are shopping precincts, landscaped public open space, general high traffic areas.

• Catchment

  High

  Medium

  Low

  N/A

• High catchment priority (if able to be determined) includes catchments that outfall directly to the bays, or are upstream of sensitive areas

• Treatment

  High

  Medium

  Low

  N/A

• High asset priority (if able to be determined) would include an asset that is the lone treatment in a catchment, or performs a significant proportion of treatment within a catchment

• Surrounds

  High

  Medium

  Low

  N/A

• Examples of low priority are assets in disturbed areas such as residential streets with ongoing construction that will stymie maintenance efforts

6.2 Initial assessment

• Health and safety issues

• Are there any elements or issues that the assessors consider to be a risk to health and safety? Please provide a full description

• Planned maintenance tasks

  Select Clear inlet/outlet(s) of sediment and debris Mowing of grass Replacing grass Prune vegetation Remove dead plants/perform minor infill planting Even out filter media surface/remove sediment or crusting Repair minor structural damage Flush underdrain system Treat for weeds/pests Other

  • Clear inlet/outlet(s) of sediment and debris
  • Mowing of grass
  • Replacing grass
  • Prune vegetation
  • Remove dead plants/perform minor infill planting
  • Even out filter media surface/remove sediment or crusting
  • Repair minor structural damage
  • Flush underdrain system
  • Treat for weeds/pests
  • Other

• Corrective maintenance tasks

  Select Hydraulic conductivity assessment Feature and level survey of asset Ongoing assessment over varied weather conditions and seasons Filter media replacement/renewal Creation of flow distribution Level resetting/development of extended detention/significant re-shaping of surface Significant re-vegetation and establishment Reconstruction of civil components Re-design in consultation with client

  • Hydraulic conductivity assessment
  • Feature and level survey of asset
  • Ongoing assessment over varied weather conditions and seasons
  • Filter media replacement/renewal
  • Creation of flow distribution
  • Level resetting/development of extended detention/significant re-shaping of surface
  • Significant re-vegetation and establishment
  • Reconstruction of civil components
  • Re-design in consultation with client

• Initial outcome

  Decomission

  Rectification works

  Planned maintenance only

6.3 Final notes