Ranger mine monitoring data

Magela Creek monitoring data 2010-2013

The graphs on this web page show the following key chemical indicators for the 2010 - 2013 wet seasons plus flow rate of the creek at the compliance point gauging station (MG009). Data for physico-chemical parameters and filterable analyte concentrations from previous wet seasons can be found at at Magela Creek grab sample monitoring data 2002 - 2010.

The Supervising Scientist's interpretation of the data in these charts is available at:

Conductivity in Magela Creek

The conductivity limit of 42 µS/cm was ectoxicologically derived and applies to exposures greater than 72 hours in duration. The Supervising Scientist has developed an appropriate interpretive framework for the less than 72 hour pulse exposure EC data produced by  the continuous monitoring program. Details can be found on the Ecotoxicological Electrical Conductivity-Magnesium Pulse Framework page.

Magela Creek continuous monitoring data (conductivity) from the 2010-11 to 2012-13 wet seasons

Magela Creek continuous monitoring data from the 2010-11 to 2012-13 wet seasons.

Turbidity in Magela Creek

The turbidity guideline of 26 NTU was determined statistically from historical weekly grab sampling data, and applies to water quality measured in grab samples. This guideline may be exceeded occasionally due to natural events but should not be exceeded due to mining activities.

Magela Creek continuous monitoring data (turbidity) from the 2010-11 to 2012-13 wet seasons

Magela Creek continuous monitoring data from the 2010-11 to 2012-13 wet seasons.

Uranium in Magela Creek

The uranium limit of 6 µg/L has been derived using local ecotoxicological data in accordance with the Australian Water Quality Guidelines to protect 99% of the species present. The limit must not be exceeded. Please note that the limit is far above the range shown on the charts.

Magela Creek continuous monitoring data (uranium) from the 2010-11 to 2012-13 wet seasons

Magela Creek uranium data from the 2010-11 and 2011-12 wet seasons.

Manganese in Magela Creek

The manganese guideline of 26 µg/L was determined statistically from historical weekly grab sampling data, and applies to water quality measured in grab samples. This guideline may be exceeded occasionally due to natural events but should not be exceeded due to mining activities.

Magela Creek continuous monitoring data (manganese) from the 2010-11 to 2012-13 wet seasons

Magela Creek manganese data from the 2010-11 to 2012-13 wet seasons.

Magnesium in Magela Creek

There is no specific guideline for magnesium in Magela Creek. EC is strongly correlated to magnesium. Therefore, the guideline for electrical conductivity is referred to when interpreting magnesium data.

Magela Creek continuous monitoring data (magnesium) from the 2010-11 to 2012-13 wet seasons

Magela Creek magnesium data from the 2010-11 to 2012-13 wet seasons.

Sulfate in Magela Creek

There is no specific guideline for sulfate in Magela Creek. EC is strongly correlated to sulfate. Therefore, the guideline for electrical conductivity is referred to when interpreting sulfate data. For comparison, the drinking water standard with taste as the criterion for sulfate is 250 mg/l.

Magela Creek continuous monitoring data (sulfate from the 2010-11 to 2012-13 wet seasons

Magela Creek sulfate data from the 2010-11 to 2012-13 wet seasons.

Radium-226 in Magela Creek

The limit for total 226Ra activity concentration has been defined for human radiological protection purposes. The medians of all 226Ra data collected over the 2010-11 wet season are calculated for both the upstream and the downstream sites. The median of the upstream data is then subtracted from the median of the downstream data. This difference value, called the 'wet season median difference', should not exceed 10 mBq/L.

Creek radium data from the 2001-02 to 2012-13 wet seasons.

Magela Creek radium data from the 2010-11 to 2012-13 wet seasons.