The proposal includes the following major elements:

• a 17 metre high homogeneous earth fill embankment;
• an embankment crest length of approximately 190 metres;
• a capacity at full supply level (87 metres AHD) of approximately 1,500,000 cubic metres;
• a surface area at full supply level of approximately 28 ha; a pump off take within the Margaret River and pipeline to the dam located along existing tracks;
• relocation of Rosa Brook Road close to the limit of the Brook's catchment; and
• possible relocation of Telecom and SECWA lines along the new Rosa Brook alignment.

As part of the development of the dam, dieback and erosion control strategies would be established and recreational amenities provided.