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Drakes Brook - Downstream Drakes Brook Dam

Basin : Harvey River

Catchment : Harvey River

The condition of the Downstream Drakes Brook Dam site (site code: HR44DRAK1/6134050), below Drakesbrook dam, has been assessed on several occasions:

  • 17-18 February 2014
  • 19-20 May 2014
  • 5-6 February 2018

NOTE: In February and May 2014 the site was assessed under site code DRAKES02/6131425.

The site was also assessed by Murdoch University's Freshwater Fish Group & Fish Health Unit on:

  • 28 February to 1 March 2022
  • 16-17 April 2025

The assessment was conducted using standard methods from the South West Index of River Condition. Measures chosen for this assessment included fish and crayfish, aquatic habitat, water quality (dissolved oxygen, temperature, electrical conductivity, and pH logged over 24h, and colour, alkalinity, turbidity and nutrients), fringing vegetation, channel morphology, erosion, connectivity, local land use and flow.

Condition summary

Please contact the River Science Branch for site information.

Fish and crayfish

Four fish and two crayfish species were found at this site across all sampling events:

  • Bostockia porosa (Nightfish)
  • Galaxias occidentalis (Western minnow)
  • Tandanus bostocki (Freshwater cobbler)
  • Gambusia holbrooki (Eastern gambusia) – non-native
  • Perca fluviatilis (Redfin perch) – non-native
  • Cherax cainii (Smooth marron)
  • Cherax quinquecarinatus (Gilgie)

Only fish and crayfish are targeted by sampling methods. Other species that were caught and/or observed are listed below:

  • Palaemon australis (South-west glass shrimp)
  • Hydromys chrysogaster (Rakali), native, semi-aquatic mammal

Click on the images below to learn more.

Species found in subcatchment

This includes all species found within the subcatchment of the assessment site, from this and previous studies in the area. The photos are linked to more information about each species, including maps of where they are expected across the south-west.

Explore other sites in the catchment