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IDAS Form 27 - Cooroibah
Attached to the e-mail Development Permit – 23 Jirrima Crescent, Cooroibah MCU16/0099.
Attached to the e-mail Changed MCU application addition of OPW Application MCU16/0099 & OPW16/0218.
IDAS form 27—Waterway barrier works
(Sustainable Planning Act 2009 version 3.2 effective 3 August 2015)
This form must be used for development applications for operational work that is the constructing or raising of
waterway barrier works.
You MUST complete ALL questions that are stated to be a mandatory requirement unless otherwise identified on this
form.
For all development applications you must:
• complete IDAS form 1—Application details
• complete any other forms relevant to your application
• provide any mandatory supporting information identified on the forms as being required to accompany your
application.
Attach extra pages if there is insufficient space on this form.
All terms used on this form have the meaning given in the Sustainable Planning Act 2009 (SPA), the Sustainable
Planning Regulation 2009, the Fisheries Act 1994 or the Fisheries Regulation 2008.
Mandatory requirements
1. Has a Fish Movement Exemption Notice been issued for the proposed work?
Yes – submit with this application, a copy of the Fish Movement Exemption Notice for the proposed work.
No – submit with this application, details of how the proposed work provides for adequate fish movement.
2. What is the nature of the proposed work? (Tick all applicable boxes.)
Construction of a new waterway barrier/s Raising an existing waterway barrier/s
Temporary waterway barrier/s Permanent waterway barrier/s
Partial waterway barrier/s Bank to bank waterway barrier/s
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3. What is the type of the proposed work? (Tick all applicable boxes.)
Number of
barriers
Dam, weir or a barrage (complete section 4)
Culvert (complete section 5)
Causeway (complete section 6)
Bridge pylon (abutments or pile foundations) (complete section 6)
Flow control structure such as a floodgate (complete section 6)
Pollution control device such as trash rack or a boom gate (complete section 6)
Levee bank across a waterway (complete section 6)
Other—please specify (e.g. groyne, construction platform, sediment curtain, causeway) Number of
(complete section 6) barriers
4. Constructing a new or raising an existing dam, weir, barrage, bund wall, coffer dam or other similar
structures
The application is seeking approval for: new barrier raising of an existing barrier
Briefly describe the type of barrier proposed (i.e. dam, weir, tidal barrage, etc.)
For a temporary barrier (i.e. in place less than 12 months), how many days will the barrier be in days
place?
Will the barrier extend across the waterway from bank to bank?
Yes
No – how long is the proposed barrier (across the waterway)? metres
– how wide is the waterway (bank to bank)? metres
What is the purpose of the proposed barrier? (E.g. creating a new or increasing the capacity of the existing water
storage, maintenance work, etc.)
IDAS form 27—Waterway barrier works
Version 3.2—3 August 2015
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What are the details of the proposed construction materials? (E.g. earth, concrete,
rock fill, steel, timber, sand, etc.)
In reference to the diagrams below, provide the following details of the proposed barrier:
• total crest height (D) metres
• thickness (A) of crest metres
• height of spillway / bywash (H) metres
• width of spillway / bywash inlet (W) metres
• base width (B) metres
• internal diameter (O) of outlet pipe/works and milli-
discharge capacity metres
• length of wall (L) metres
Cross section of barrier • distance of backup from barrier wall at full metres
supply level
• volume of storage. mega-
litres
• If raising an existing waterway barrier:
- additional height above existing crest metres
- method of raising (e.g. capping crest, inflatable bag, gates etc.).
Aerial view of waterway
Does the application involve more than one barrier addressed by this section?
Yes - generate another section 4 response for each barrier and submit with the application.
No - if the application involves another type of barrier identified in section 3, go to the relevant section
identified.
- if the application does not involve another type of barrier identified in section 3, go to section 7.
IDAS form 27—Waterway barrier works
Version 3.2—3 August 2015
Page 4
5. Constructing a new or modifying (including maintenance and replacement of) an existing culvert
What is the nature of the proposed work? Construction of a new culvert
Maintenance of an existing culvert
Replacement of an existing culvert
What is the purpose of the proposed culvert?
Heavy vehicle access to facilitate construction of nbn™ Telecommunications Facility.
For a temporary barrier (i.e. in place less than 12 months), how many days will the culvert be in days
place?
Will the culvert extend across the waterway from bank to bank?
Yes
No - how long is the proposed culvert (across the waterway)? metres
- how wide is the waterway (bank to bank)? metres
What type of culvert is proposed?
Box culvert Arch culvert Pipe culvert
Combination culvert Other—please specify:
In reference to the diagrams below, provide the following details of the proposed culvert.
How many culvert cells are there? 2
What is the upstream downstream culvert cell length? 4.8 metres
What is the inside cell width of each culvert (or diameter of pipe culvert)? 1.2 metres
What is the internal height within the culvert cell? 1.2 metres
IDAS form 27—Waterway barrier works
Version 3.2—3 August 2015
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Culvert cell length
o w
n of fl
ctio
Dire
Direction of flow
Culvert cell length
Culvert Culvert cell width
cell
width
The culvert cell length
The left bank Embankment
Road
th .
wid
ay
terw
wa
k full
ban
The
Road
The right bank Armoring
the waterway bed gradient.
The culvert cell area
The inside cell height
Does the application involve more than one culvert?
Yes - generate another section 5 response for each culvert and submit with the application.
No - if the application involves another type of barrier identified in section 3, go to the relevant
section identified.
- if the application does not involve another type of barrier identified in section 3, go to section 7.
6. Constructing a new or modifying (including maintenance and replacement) an existing waterway barrier
except those listed in sections 4 and 5.
What is the nature of the proposed work? Construction of a new barrier
Replacement of an existing barrier
Maintenance of an existing barrier
Briefly describe the proposed barrier.
IDAS form 27—Waterway barrier works
Version 3.2—3 August 2015
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For a temporary barrier (i.e. in place less than 12 months), how many days will the barrier be in days
place?
Will the barrier extend across the waterway from bank to bank?
Yes
No - how long is the proposed barrier (across the waterway)? metres
- how wide is the waterway (bank to bank)? metres
What is the purpose of the proposed barrier?
What is the maximum height of the proposed barrier above the existing bed level? metres
What are the proposed construction materials? (E.g. earth, concrete, rock fill, steel, timber, sand, etc.)?
Does the barrier follow the natural gradient of the bed level?
Yes
No
Does the application involve more than one barrier under this section?
Yes - generate another section 6 response for each barrier and submit with the application.
No - go to section 7.
Mandatory supporting information
7. Confirm the following mandatory supporting information accompanies this application.
Mandatory supporting information Confirmation of Method of
lodgement lodgement
Location details for all applications
IDAS form 27—Waterway barrier works
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A scale map/sketch plan of the site and the neighbouring area identifying: Confirmed
• the site of the proposed works on the waterway
• the names of the waterway and the catchment in which the waterway is
located
• stream order
• where the (site) waterway joins with another, more major waterway (or
coastal waters) downstream
• other easily identifiable geographical features adjacent to the proposed
works
• the limit and area of impounded waters (upstream weir pool) at full
supply level (if relevant).
GPS coordinates and zone references of the works site (GDA94 Confirmed
preferred).
Photographs of the site and the waterway upstream and downstream of Confirmed
the works site.
A scale plan showing the limit of and area of impounded waters at full Confirmed
supply level.
Details of the proposed development for all applications
Justification and the benefits of the proposed waterway barrier works. Confirmed
Assessment of lesser impact alternatives and reasons for the proposed Confirmed
waterway barrier.
Details of the proposed waterway barrier. Confirmed
Details of the structure and management of the impoundments. Confirmed
Details of the proposed maintenance program on the waterway barrier Confirmed
after construction.
A statement addressing the relevant part(s) of the State Development Confirmed
Assessment Provisions (SDAP). Not applicable
Details of the waterway for all applications
A scaled plan showing a cross-section of the stream profile at the Confirmed
proposed location.
Description of the stream morphology at the proposed location, and up to Confirmed
1 km upstream and downstream (e.g. width and depth of stream, stream
bed substrate types, bank stability, presence of pools, rifle runs, sand
bars, etc.).
Description of the riparian habitats at and adjacent to the proposed Confirmed
location (e.g. Intact native vegetation, presence of weeds and other
disturbances).
Description of the stream hydrology (e.g. flood frequency and height, Confirmed
altered flow regimes due to existing waterway barriers)
• Note: for most applications involving permanent waterway barriers on
larger waterways, specific data on stream hydrology and flood levels
will be required.
IDAS form 27—Waterway barrier works
Version 3.2—3 August 2015
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Description of likely changes to stream hydrology resulting from Confirmed
construction of the proposed barrier.
• Note: for most applications involving permanent waterway barriers on
larger waterways, the results of hydrological modelling will be required
to show expected changes to flow characteristics, particularly velocity,
at different water levels, expected headwater/tail water differences at
different water levels, and frequency, timing and duration of drown-out
of the proposed structure.
Aquatic ecology details for all applications
Description of the aquatic ecology at, and adjacent to, the proposed Confirmed
location, including instream fauna and flora, fish assemblages, and
endangered or vulnerable fish species.
Description of likely impacts on fish movements as a result of construction Confirmed
of the waterway barrier, with reference to expected changes instream
hydrology.
Description of likely impacts on both riparian and aquatic habitats as a Confirmed
result of construction of the waterway barrier, including impacts due to the
expected changes instream hydrology.
Description of any proposed disturbances to riparian and aquatic habitats Confirmed
associated with construction activities (e.g. site access for machinery and
personnel, material laydown areas, potential turbidity or other water
quality impacts).
Details of the construction for all applications
Scaled drawings of the proposed waterway barrier works. Confirmed
If a fishway is proposed, scaled drawings of the fishway and details of Confirmed
proposed operation and maintenance of the fishway. Not applicable
Time frame for construction of the proposed barrier. Confirmed
Mitigation details for all applications
Description of any design features of the proposed waterway barrier that Confirmed
will help to mitigate the impacts of the structure on fish movements. Not applicable
Description of all measures that will be implemented during the Confirmed
construction period to mitigate the impacts of construction on aquatic
habitats.
Description of all measures that will be undertaken at the completion of Confirmed
construction activities to restore the site to its previous condition or better.
For applications relating to section 5 of this form (separate information to be provided for each barrier)
Culvert design information including: Confirmed
• whether the invert of the culvert is above, at or below waterway bed
levels
• size, angle, numbers and position of any baffles along the inner walls
of the culverts
• details of the culvert cell bed (bed material, rocks to aid fish passage,
riffle, smooth concrete or roughness, baffles, etc)
• whether there will be a low flow channel culvert in any multi-cell
culverts
IDAS form 27—Waterway barrier works
Version 3.2—3 August 2015
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• detail on whether the culvert base gradient is less than, the same as or
more than the natural gradient of the waterway bed.
For applications relating to section 6 of this form (separate information to be provided for each barrier)
All dimensions of the barrier Confirmed
Detailed drawings of the barrier design Confirmed
The operational requirements of the barrier Confirmed
Details of any aprons, embankments or other erosion control methods Confirmed
The specific structural inclusions to improve fish passage across the Confirmed
barrier
Privacy—please refer to your assessment manager, referral agency and/or building certifier for further details on the
use of information recorded in this form.
OFFICE USE ONLY
Date received Reference numbers
The Sustainable Planning Act 2009 is administered by the Department of Infrastructure, Local Government and
Planning. This form and all other required application materials should be sent to your assessment manager and any
referral agency.
IDAS form 27—Waterway barrier works
Version 3.2—3 August 2015