IDAS Form 27 - Cooroibah

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