IDAS Form 15 - Gravity Diversion from a Watercourse
(Sustainable Planning Act 2009 version 3.1 effective3 August 2015)
This form must be used for development applications for operational work that involve gravity diversion from a watercourse.
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.
All terms used on this form have the meaning given in the Sustainable Planning Act 2009 (SPA) or the Sustainable Planning Regulation 2009.
Note: If this development application involves a state resource, this application is not required to be supported by evidence of resource entitlement. The allocation or entitlement to the resource is a separate process and should be obtained prior to development commencing.
Mandatory requirements
1.Are the works existing?
No / Yes—date constructed (if known)
2.What type of outlet is proposed for the gravity diversion?
Gravity channel—complete Table A / Gravity pipeline—complete Table B
Table A (give dimensions to one decimal point)
Top width (A) / . / metres
Bottom width (B) / . / metres
Depth (C) / . / metres
Length / . / metres
Bed slope / ratio
Side slope / ratio
Flow capacity / cubic metres/second
IDAS form 15—Gravity diversion from a watercourse
Version 3.1—3 August 2015
Table B (give dimensions to one decimal point)Material type (e.g. PVC, steel) /
Diameter (A) / . / millimetres
Length / . / metres
Number of proposed pipes (non-mandatory)
Bed slope (non-mandatory) / ratio
Flow capacity
(non-mandatory) / cubic metres/second
3.Is there any vegetation within the water body or watercourse that is proposed to be cleared?
No / Yes (additional non-mandatory information can be provided to assist with the assessment of the application)
4.Is there any filling or excavation proposed in the watercourse or water body?
No / Yes (additional non-mandatory information can be provided to assist with the assessment of the application)
Mandatory supporting information
5.Confirm that the following mandatory supporting information accompanies this application
Mandatory supporting information / Confirmation of lodgement / Method of lodgement
A sketch plan showing:
- the location of the proposed gravity diversion and any existing gravity diversion
- lot boundaries and descriptions
- existing works
Not applicable
- the position of any watercourses or water bodies
Not applicable
- the position of any roads
Not applicable
- the position of any area to be irrigated.
Not applicable
Written documentation
A statement addressing the relevant part(s) of the State Development Assessment Provisions (SDAP). / Confirmed
Not applicable
Non-mandatory supporting information
6.Confirm that the following non-mandatory supporting information accompanies this application
Non-mandatory supporting information / Confirmation of lodgement / Method of lodgement
Details of any vegetation within the water body or watercourse proposed to be cleared. / Confirmed
Not applicable
Details of any filling or excavation proposed in the watercourse or water body. / Confirmed
Not applicable
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 numbersThe 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 15—Gravity diversion from a watercourse
Version 3.1—3 August 2015