The Freddie B prospect lies along the west bank of Hayes (Five-mile) Creek, immediately south of the creek's confluence with Collet Creek, and 10 kilometres northeast of Princeton.

Hayes Creek flows south-southeast, along the contact between the Early Jurassic Bromley batholith and sedimentary facies of the Upper Triassic Nicola Group. The Nicola Group rocks along the west side of the creek consist of mafic flows and pyroclastics, and chlorite- hematite altered sandstones and argillites. Schistosity in the volcanics and sediments strikes 010 degrees and dips 80 degrees east. The Nicola Group rocks are intruded by small bodies and dikes of syenodiorite, diorite and monzonite.

The prospect is comprised of a series of scattered outcrops and old workings with copper mineralization, lying in a belt 200 metres wide that follows Hayes Creek northward for 600 metres to the mouth of Collet Creek. Mineralization is hosted in the volcanics and sediments and consists of malachite, azurite and lesser chalcopyrite, along narrow fractures developed parallel to the schistosity. Patchy, fine disseminated pyrite and chalcopyrite are also present. This mineralization is associated with stronger propylitic (chlorite, epidote) and carbonate alteration. Minor silicification and orthoclase alteration is also evident. Gypsum veinlets are locally quite abundant.

An adit driven into the west bank of the creek intersected a zone of numerous mineralized fractures over a width of 15 metres. A longer adit, 10 metres below, is reported to have also intersected this mineralization. A chip sample taken 500 metres north of the adits analysed 0.34 per cent copper over 35 metres, including 0.48 per cent copper, 0.115 grams per tonne gold, 3.8 grams per tonne silver and 0.105 per cent zinc over 8 metres (Assessment Report 21864, Figure 6). Grab samples have yielded copper values of up to 2.2 per cent and silver values of up to 10.6 grams per tonne (Assessment Report 21864, page 19). Anomalous gold values are also reported (Minister of Mines Annual Report 1908, page 130).

This occurrence was initially explored by two adits and several trenches around 1908. It was also prospected and sampled by A. Mitchell in 1976 and by Placer Dome Inc. in 1991.