Constructing a dam
Dams are generally built to control and store water. Council defines the construction of a dam as operational work (filling or excavation). In most cases, constructing a dam requires approval. This ensures that the possible impacts on safety, people, properties and the environment are managed.
Can I divert water?
Constructing a dam may involve diversion of water. For example, you may shape land or add swales to direct surface water into a dam. You may divert water within the property where the dam is being constructed as long as it does not cause:
- ponding on any premises (can be in the dam but not elsewhere and not on adjoining properties)
- a hazard or an adverse effect on personal health, safety and premises
- diversion or concentration of flow from or onto adjoining properties or infrastructure.
Do I need approval
The Logan Planning Scheme 2015 provides limited opportunity to construct a dam without a development permit. In most situations you need approval.
You will need approval to construct a dam if:
- it is located within any of the following overlays from the Logan Planning Scheme 2015
- Flood Hazard Overlay
- Landslide Hazard and Steep Slope Area Overlay
- Waterway Corridors and Wetlands Overlay
- it meets any of the following design criteria
- is for public infrastructure use
- is located within 10 metres of a property boundary
- is located within 40 metres of a building (fixed structure with a roof, wholly or partly enclosed by walls)
- involves a retaining wall that is
- located within a local government easement or a road or greater than 1.5m in height or 3m with benching
- not located wholly within one lot.
Depending on your property's zone, criteria may also apply to:
- filling or excavation volumes
- area and retaining wall specifications.
For more information see the Logan Planning Scheme 2015, Part 5 section 5.8 – Tables of Assessment.
How do I get approval?
To get approval (a development permit), lodge a development application for Operational Works with Council. You can do this online, in person, by post or email.
Include the following information with your application:
- filling and excavation plan signed by an Registered Professional Engineer of Queensland (RPEQ)
- cross-section plans for filling and excavation that show adjoining property boundaries (where filling and excavation are next to existing developments)
- quality and composition of fill material used (if filling a dam)
- the effect on the drainage of adjoining properties from any cut and fill operation - the design should ensure that there is no pondage of water or nuisance stormwater runoff
- how you will identify and preserve trees and vegetation along rivers, creeks and waterways (in riparian or other buffer zones)
- a demonstration of compliance with the relevant overlay codes relating to filling.
Find out more about development applications.
How much will it cost?
Fees for development applications are dependent on:
- the type and scale of development
- the category of assessment
- other factors.
You can find a list of fees in:
- register of cost recovery fees and schedule of commercial and other charges (PDF 4.5 MB)
- Logan PD Hub, which includes a development fee estimator.
Payment is not required up front if you lodge a development application online. Instead, Council will issue a Notice of Account stating the required fees for payment.
For more information please contact our team. You can also visit us in person at the Logan Central Administration Centre.