The Statlu aggregate property is located immediately west of the Chehalis River and south of Statlu Creek, approximately 16 kilometres northwest of the community of Harrison Hot Springs.

Regionally, the area is underlain by the Ashlu Creek pluton composed of quartz diorite and the Harrison Lake Formation, composed of intermediate and felsic volcanic rocks and associated volcaniclastic sediments.

The sediments covering the property span the middle Wisconsin (Olympia no glacial interval) to Holocene time. Sediments are divided into six units; Unit 1: gravel;, Unit 2: laminated silt; Unit 3: interstratified sand and gravel; Unit 4: diamicton; Unit 5: laminated silt with minor sand and clay; Unit 6: gravel and diamicton. Complete descriptions of each unit can be found in Assessment Report 28165.

Locally, a large section, approximately 15 metres thick, of sand and gravel belonging to unit 3 is exposed. The gravel beds range from 0.3 to 1.5 metres thick and are generally massive and ungraded, and poorly to moderately sorted. The sand beds vary in grain size and discontinuous silty sand layers are up to 10 centimetres thick. This area is approximately 1200 metres long and 1400 metres wide. This block of sand and gravel has an indicated volume of 100 to 200 million tonnes (Assessment Report 28165).

In 2006, a vertical channel sample of the gravel was sampled for its gold content. An 11.34 kilogram sample returned 64 grams of black sand, which had values of 86.83 grams per tonne gold, including 68.44 grams per tonne in the metallic fraction. Based on this analysis, it would take 177.18 tonnes of material to produce one tonne of the black sand concentrate, indicating that the material ran 0.49 grams per tonne gold (Assessment Report 28165).