Nullinga Dam and Mareeba Dimbulah Water Supply Scheme Improvements

Building Queensland led the development of the Nullinga Dam and Mareeba Dimbulah Water Supply Scheme Improvements Detailed Business Case in partnership with Sunwater.

The business case provides a robust assessment of the opportunities and challenges of increasing water availability in support of potential future agricultural demand in the Mareeba Dimbulah Water Supply Scheme.

The business case investigated improving the Mareeba Dimbulah Water Supply Scheme rules and operation, and upgrading the existing Arriga and East Barron Channels. An in-depth analysis of the design and construction of Nullinga Dam was also undertaken.

The business case analysis reveals construction of the proposed Nullinga Dam is neither financially or economically viable. The proposed Nullinga Dam site is located in a poor performing catchment requiring a costly build solution. To construct a dam that would meet identified demand would require an extended and costly construction program relative to the volume of water that would be available.

The detailed business case was completed in June 2019.

View the Nullinga Dam and Mareeba Dimbulah Water Supply Scheme Improvements Detailed Business Case below.

Contents and glossary

1. Executive Summary

2. Proposal Background

3. Methodology

4. Governance

5. Service need

6. Strategic Considerations

7. Options Considered

8. Base Case

9. Reference Project

10. Legal Considerations

11. Market Considerations

12. Public Interest Considerations

13. Delivery Model Analysis

14. Sustainability Assessment

15. Economic Analysis

16. Social Impact Evaluation

17. Environmental Assessment

18. Financial and Commercial Analysis

19. Affordability Analysis

20. Conclusions

21. Recommendations

View a summary of the Nullinga Dam and Mareeba Dimbulah Water Supply Scheme Improvements Detailed Business Case, including cost benefit analysis.

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