New weapon in the war on weeds

Rous Water has a new weapon in the fight against the aquatic weed salvinia molesta at Emigrant Creek Dam.

Salvinia is a resilient, fast-spreading Class 3 weed in the Far North Coast area that has the potential to choke waterways, with detrimental environmental and economical impacts.

The new flat bottom boat with a hydraulic powered front scoop drastically reduces the time and effort needed to remove the weed. On its maiden voyage the boat with one operator was able to remove 2000kg of salvinia weed and two 100kg logs from the dam within half an hour.

“This same task would have normally taken two fit men an entire day to complete. That’s 16 man-hours of manual labour reduced to 30 minutes with a machine,” Rous Technical services director Wayne Franklin said.

The weed is transported out of the water and onto the bank of the dam from where it is transported away to decompose.

The weed harvester will be used at least twice a week all year round and may be used for other purposes such as flood clean-up operations when necessary.


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