Ranger mine monitoring data

Magela Creek monitoring data 2012-2013

The graphs on this web page show the following key chemical indicators for the 2012 - 2013 wet season 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 Magela Creek grab sample monitoring data 2002 - 2010 and Magela Creek monitoring data 2010-12.

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

Conductivity in Magela Creek

The conductivity guideline of 43 μS/cm 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. The Supervising Scientist has developed an appropriate interpretive framework for the EC data produced by the continuous monitoring program. Details can be found on the Ecotoxicology Electrical Conductivity-Magnesium Pulse Framework page.

Magela Creek continuous monitoring data (conductivity) from the commencement of the 2011-12 wet season

Magela Creek continuous monitoring data from the commencement of the 2012-13 wet season.

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 commencement of the 2011-12 wet season

Magela Creek continuous monitoring data from the commencement of the 2012-13 wet season. Discharge data will be added to the webpage following quality assurance and validation.

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 uranium data from the commencement of the 2012-13 wet season.

Magela Creek uranium data from the commencement of the 2012-13 wet season.

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 manganese data from the commencement of the 2012-13 wet season.

Magela Creek manganese data from the commencement of the 2012-13 wet season.

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. The Supervising Scientist has developed an appropriate interpretive framework for the EC data produced by the continuous monitoring program. Details can be found on the Ecotoxicology Electrical Conductivity-Magnesium Pulse Framework page.

Magela Creek magnesium data from the commencement of the 2012-13 wet season.

Magela Creek magnesium data from the commencement of the 2012-13 wet season.

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 sulfate data from the commencement of the 2012-13 wet season.

Magela Creek sulfate data from the commencement of the 2012-13 wet season.

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 2011-12 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.

Graph showing radium levels in Magela Creek by year

Magela Creek radium data from the 2001-2013 wet seasons