Council continues to monitor local waterways
June 25, 2013
Shoalhaven City Council staff is continuing to monitor the area’s lake and river systems as the ongoing heavy rains continue.
Lake Tabourie reached 1m AHD at 4pm yesterday, 17 centimetres below the level required to trigger a mechanical opening.
Further rainfall overnight combined with the prevailing high tide and heavy ocean swells bringing additional water into the lake has seen the lake level rise rapidly today.
After witnessing the ocean overtopping the entrance during a site visit this morning, Council staff have determined that the prevailing conditions have made it unsafe to bring machinery on site to excavate the entrance at this stage.
The situation will be reassessed tomorrow.
Lake Conjola has broken out to the sea with strong flows reported to be heading into the ocean.
Despite this, the heavy seas and continuing rainfall have seen the lake level continue to rise with the height recorded at 1.35m AHD at 10.15 am this morning.
Swan Lake reached a peak of 2.2m AHD at approximately 3pm yesterday afternoon and naturally breached the entrance berm.
Water levels had since dropped to 1.88m AHD at 6am this morning.
The Bureau of Meteorology issued a minor flood warning this morning for the Shoalhaven River which triggered works on the notch at Shoalhaven Heads.
The flood peak is predicted to reach 2.3m at Nowra Bridge at 3pm this afternoon however the Bureau of Meteorology will provide an updated forecast at 1pm today.
In accordance with the adopted entrance plan for Shoalhaven River, a final breach of Shoalhaven Heads could only take place if a level of 3m AHD is reached, a forecast is for continued rise beyond 3m AHD at Nowra Bridge or if the water level at Shoalhaven Heads is rapidly approaching 2m AHD.
It is highly likely that the high tide this evening combined with large swells and continuing rainfall will generate further flooding of our lakes and rivers.
Residents can access weather warnings and lake level information at www.bom.gov.au.
Flood safe information can be accessed from the SES FloodSafe website www.floodsafe.com.au
For emergency assistance please contact the SES on 132 500.