Rain Garden - condition assessment

• Site name

• Asset ID

• Conducted on

  Date

• Audit conducted by

  Daniel Idczak

  Thanh Nguyen

• 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

  Other

• 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

• Is the rain garden in series?

  Yes

  No

  N/A

• List asset IDs of associated rain gardens

• Connected assets

• Asset function

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

• Type of catchment

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

• Location of rain garden

• How would you classify this location?
  eg. road reserve, active open space, retarding basin, private property

• Traffic conditions

• This is useful to plan maintenance and repairs
  eg. Low traffic - residential street, high traffic - major road

• Detention depth

• Estimate available detention depth in millimetres, noting potential design issues
  eg. 100mm impacted by angled grate extending from RG base.

• Date of previous inspections

  Date

Independent structures (part of asset)

• This section is for structures that are included as part of the asset. Many signs, bollards etc will have their own asset ID.
  
  Using the condition assessment manual as a guide, rate the individual component. Take photographs to corroborate the rating, and make note of the material and any other important points in the description, including the number of components (if multiple).

• Fencing defects?

  Yes

  No

  N/A

• Photo of defects

  Media

• Description of defects

• Bollards defects?

  Yes

  No

  N/A

• Photo of defects

  Media

• Description of defects

• Signage defects?

  Yes

  No

  N/A

• Photo of defects

  Media

• Description of defects

Connected surfaces (part of asset)

• Road defects?

  Yes

  No

  N/A

• Photo of defects

  Media

• Description of defects

• Footpath defects?

  Yes

  No

  N/A

• Photo of defects

  Media

• Description of defects

Civil structures

• Using the condition assessment manual as a guide, rate the individual component. Take photographs to corroborate the rating, and make note of the material and any other important points in the description, including the number of components (if multiple).

• Inlet (Concrete)

  Select N/A - Not present 0 - As new 1 - Near new 2 - Excellent 3 - Very good 4 - Good 5 - Fair 6 - Fair to poor 7 - Poor 8 - Very poor 9 - Extremely poor 10 - Failed

  • N/A - Not present
  • 0 - As new
  • 1 - Near new
  • 2 - Excellent
  • 3 - Very good
  • 4 - Good
  • 5 - Fair
  • 6 - Fair to poor
  • 7 - Poor
  • 8 - Very poor
  • 9 - Extremely poor
  • 10 - Failed

• Evidence of condition

  Media

• Description of condition

• A rain garden may have multiple inlets. They could be pipes, wide concrete aprons, or regular breaks in a kerb. Photograph all inlets and consider the overall condition of them as a group.

• Outlet (underdrain)

  Select N/A - Not present 0 - As new 1 - Near new 2 - Excellent 3 - Very good 4 - Good 5 - Fair 6 - Fair to poor 7 - Poor 8 - Very poor 9 - Extremely poor 10 - Failed

  • N/A - Not present
  • 0 - As new
  • 1 - Near new
  • 2 - Excellent
  • 3 - Very good
  • 4 - Good
  • 5 - Fair
  • 6 - Fair to poor
  • 7 - Poor
  • 8 - Very poor
  • 9 - Extremely poor
  • 10 - Failed

• Evidence of condition

  Media

• Description of condition

• The treatment outlet of a rain garden is the underdrain. A partial observation can be made by checking through an inspection opening (if present) or by looking into pit associated with the rain garden. Only a limited assessment will be able to be made but try to determine if water is flowing/can flow through it.

• Overflow outlet

  Select N/A - Not present 0 - As new 1 - Near new 2 - Excellent 3 - Very good 4 - Good 5 - Fair 6 - Fair to poor 7 - Poor 8 - Very poor 9 - Extremely poor 10 - Failed

  • N/A - Not present
  • 0 - As new
  • 1 - Near new
  • 2 - Excellent
  • 3 - Very good
  • 4 - Good
  • 5 - Fair
  • 6 - Fair to poor
  • 7 - Poor
  • 8 - Very poor
  • 9 - Extremely poor
  • 10 - Failed

• Evidence of condition

  Media

• Description of condition

• This is the outlet within the rain garden that allows for it to drain quickly if water gets too high. It is generally a raised grate.

• High flow bypass

  Select N/A - Not present 0 - As new 1 - Near new 2 - Excellent 3 - Very good 4 - Good 5 - Fair 6 - Fair to poor 7 - Poor 8 - Very poor 9 - Extremely poor 10 - Failed

  • N/A - Not present
  • 0 - As new
  • 1 - Near new
  • 2 - Excellent
  • 3 - Very good
  • 4 - Good
  • 5 - Fair
  • 6 - Fair to poor
  • 7 - Poor
  • 8 - Very poor
  • 9 - Extremely poor
  • 10 - Failed

• Evidence of condition

  Media

• Description of condition

• This will not be present for all assets. Many small rain gardens have a side entry pit immediately downstream that allows excess flows to be directed around the asset completely.

• Access to structures

  Select N/A - Not present 0 - As new 1 - Near new 2 - Excellent 3 - Very good 4 - Good 5 - Fair 6 - Fair to poor 7 - Poor 8 - Very poor 9 - Extremely poor 10 - Failed

  • N/A - Not present
  • 0 - As new
  • 1 - Near new
  • 2 - Excellent
  • 3 - Very good
  • 4 - Good
  • 5 - Fair
  • 6 - Fair to poor
  • 7 - Poor
  • 8 - Very poor
  • 9 - Extremely poor
  • 10 - Failed

• Evidence of condition

  Media

• Description of condition

• Access for vehicles and/or maintenance crews must be available to all structures. If not, please highlight in audit results and prioritise rectification works.

Surfaces

• Using the condition assessment manual as a guide, rate the individual component. Take photographs to corroborate the rating, and make note of the material and any other important points in the description, including the number of components (if multiple).

• Batter slopes

  Select N/A - Not present 0 - As new 1 - Near new 2 - Excellent 3 - Very good 4 - Good 5 - Fair 6 - Fair to poor 7 - Poor 8 - Very poor 9 - Extremely poor 10 - Failed

  • N/A - Not present
  • 0 - As new
  • 1 - Near new
  • 2 - Excellent
  • 3 - Very good
  • 4 - Good
  • 5 - Fair
  • 6 - Fair to poor
  • 7 - Poor
  • 8 - Very poor
  • 9 - Extremely poor
  • 10 - Failed

• Evidence of condition

  Media

• Description of condition

• Rain garden surface

  Select N/A - Not present 0 - As new 1 - Near new 2 - Excellent 3 - Very good 4 - Good 5 - Fair 6 - Fair to poor 7 - Poor 8 - Very poor 9 - Extremely poor 10 - Failed

  • N/A - Not present
  • 0 - As new
  • 1 - Near new
  • 2 - Excellent
  • 3 - Very good
  • 4 - Good
  • 5 - Fair
  • 6 - Fair to poor
  • 7 - Poor
  • 8 - Very poor
  • 9 - Extremely poor
  • 10 - Failed

• Evidence of condition

  Media

• Description of condition

Vegetation

• Grass/turf

  Select N/A - Not present 0 - As new 1 - Near new 2 - Excellent 3 - Very good 4 - Good 5 - Fair 6 - Fair to poor 7 - Poor 8 - Very poor 9 - Extremely poor 10 - Failed

  • N/A - Not present
  • 0 - As new
  • 1 - Near new
  • 2 - Excellent
  • 3 - Very good
  • 4 - Good
  • 5 - Fair
  • 6 - Fair to poor
  • 7 - Poor
  • 8 - Very poor
  • 9 - Extremely poor
  • 10 - Failed

• Evidence of condition

  Media

• Description of condition

• Treatment vegetation

  Select N/A - Not present 0 - As new 1 - Near new 2 - Excellent 3 - Very good 4 - Good 5 - Fair 6 - Fair to poor 7 - Poor 8 - Very poor 9 - Extremely poor 10 - Failed

  • N/A - Not present
  • 0 - As new
  • 1 - Near new
  • 2 - Excellent
  • 3 - Very good
  • 4 - Good
  • 5 - Fair
  • 6 - Fair to poor
  • 7 - Poor
  • 8 - Very poor
  • 9 - Extremely poor
  • 10 - Failed

• Evidence of condition

  Media

• Description of condition

• This is the vegetation within the limits of the rain garden surface.

Hydraulic conductivity

• Is hydraulic conductivity testing required?

  Yes

  No

  N/A

• Rate of hydraulic conductivity (field test)

• If condition of surface or vegetation is fair to poor due to too much or too little water, the filter media may be compromised. Field testing can give an indication of whether this is part of the problem.

Asset works priority

• Visibility

  High

  Medium

  Low

  N/A

• Visibility: 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

• Treatment: 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

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

Initial assessment

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

• Health and safety concerns?

  Yes

  No

• Health and Safety issues

• Corrective maintenance tasks required (Not planned)

  Select Other Feature and level survey of asset Ongoing assessment over varied weather conditions and seasons Creation of flow distribution Level resetting/development of extended detention/significant re-shaping of surface Significant re-vegetation and establishment Major removal of plants/trees Reconstruction of civil components Re-design in consultation with client

  • Other
  • Feature and level survey of asset
  • Ongoing assessment over varied weather conditions and seasons
  • Creation of flow distribution
  • Level resetting/development of extended detention/significant re-shaping of surface
  • Significant re-vegetation and establishment
  • Major removal of plants/trees
  • Reconstruction of civil components
  • Re-design in consultation with client

• Other maintenance

• Overall assessment category

  Maintain

  Rectify

  Rectify - delay

  Decommission

  Decommission -redefine

Final notes

• Based on your observation of the total function of the asset and your individual condition ratings of components, provide an overall rating for the asset. The Condition Assessment Manual contains general guidance.

• Overall condition rating

  Select N/A - Not present 0 - As new 1 - Near new 2 - Excellent 3 - Very good 4 - Good 5 - Fair 6 - Fair to poor 7 - Poor 8 - Very poor 9 - Extremely poor 10 - Failed

  • N/A - Not present
  • 0 - As new
  • 1 - Near new
  • 2 - Excellent
  • 3 - Very good
  • 4 - Good
  • 5 - Fair
  • 6 - Fair to poor
  • 7 - Poor
  • 8 - Very poor
  • 9 - Extremely poor
  • 10 - Failed

• Overall comment