Spreading downhill of water outlet. A seed head cut today which still contains 100s of seeds. Spread of this invasive weed downhill of the new water outlet recorded and reported before see also comments): https://canberra.naturemapr.org/sightings/4653446 and https://canberra.naturemapr.org/sightings/4722012. Ideally the seed heads would be cut and removed from site, adult plants dug out and replaced with species such as Carex appressa or Poas. Planting of native ground cover was carried out uphill of the water discharge.