The draft Hay & Maude Flood Study Report was presented to the Floodplain Risk Management Committee on 17th March 2023. The flood model has been compiled using the various flood study reports undertaken over the years, as well as correlates known river floodplain flows from different flood events. The Committee agreed that flood model presented reflects the flood extent of Hay and Maude. The draft Hay & Maude Flood Study Report high-lighted:
- 1:100 flood level in Hay is estimated to be 9.49m, with breakout flows to north and south of Hay. This equates to flow of 1,050 m3/s or 91,000 ML/ day in the floodplain.
- Based on this flood level the levee in Hay, allowing for the new standard of 800mm freeboard, is to be estimated at 10.3m.
- The November 2022 flood was a 1:20 event with peak total flow of 820 m3/s or 71,000 ML/day. The November 2022 flood peaked at 9.11m in Hay, and 7.61m in Maude.
Following public consultation, the Hay & Maude Flood Study Report is to be adopted by Council and the consultant will then commence Part 2 of the FRMS&P, being the discussion on possible flood mitigation measures. This could include what the upgrade of the levee could look like, with any upgrade likely to include a range of construction types such as earth embankment (as is the current situation), sheet piling walls, and removeable walls.
It was also discussed with SES at the meeting the issue around having an electronic gauge in Hay, and SES confirmed they are in discussions with the BOM on this matter. Council has also raised the issue through the Local Emergency Management Committee (LEMC).
The Committee recommended the draft Hay & Maude Flood Study Report to go to Council for endorsement for public comment following Committee Review. Council resolved to endorses the draft Hay & Maude Flood Study Report for public exhibition for minimum of 28 days, following the Committee review.
The draft reports can be found on below, submissions can be made at the Council Administration building at 134 Lachlan Street, Hay,
Have Your Say page, or email
mail@hay.nsw.gov.au.
Submissions close 14th May 2023.