The Gus showing is situated on a south-facing slope at approximately 1600 metres elevation, northwest of Swift Creek, west of the Salmo River and approximately 7 kilometres southwest of Salmo.

The Gus (Swift) area is underlain mainly by basaltic volcanics of the Lower Jurassic Rossland Group, Elise Formation composed of flow breccia, massive flows, agglomerate, tuff and sill-like intrusives (augite porphyry). A minor amount of laminated, tuffaceous siltstone and shale occurs as interbeds. These are overlain by argillites and quartzites of the Rossland Group, Hall Formation and are underlain by black argillaceous siltstone and arenaceous argillite of the Rossland Group, Archibald Formation. The Rossland Group rocks are intruded by the Middle to Late Jurassic Nelson intrusions, which are composed of a mass of granodiorite and associated dikes.

Quartz veins fill irregular fractures, ranging from less than 1 to up to 30 centimetres that cut carbonatized and locally silicified mafic tuffs. Late syenite dikes occur near zones of alteration. The veins contain up to 10 per cent chalcopyrite, sphalerite and galena. Significant gold and silver values were encountered in variably altered tuffs, silicified tuffs and quartz veins.

The existence of two small historic pits on the southern boundary of the Swift 3 claim was reported in 1985. The pits exposed narrow (10 centimetres) quartz veins. In the 1950s, placer gold mining operations were active in Tillicum Creek on the southwest corner of the Swift claim block.

Falconbridge staked the Swift claims in 1984 based on the results of a regional lithogeochemical survey. Initial exploration on the Swift property focused on volcanogenic massive sulphide copper-zinc deposits; however, the focus soon changed to following up gold-in-soil anomalies. In 1984, one small soil grid was sampled on the Gus claims. In 1985, Falconbridge conducted mapping, geochemical and geophysical surveying on the Swift, Gus and Ace in the Hole (MINFILE 082FSW350) claims. In 1987, Falconbridge Limited and Kidd Creek Mines completed 31 trenches totalling 1730 metres in length on the Swift-Gus and Ace in the Hole (MINFILE 082FSW350) claims. The trenches were mapped and a total of 463 channel and grab samples were collected and sent for analysis. Of the 24 trenches completed on the Swift and Gus claims, five returned values of more than 1 gram per tonne gold (Assessment Report 16901, page 17). Later that year, eight NQ diamond drill holes totalling 892 metres were completed by Falconbridge and resulted in the discovery of gold in quartz veins enclosed within a broad (approximately 100 metres wide) zone of carbonate alteration.

In 2005, the Katie claim group (082FSW290), owned by John A. Chapman and KGE Management Limited, was merged with the Swift and Ace in the Hole (082FSW350) claim groups to form the Swift Katie property.

In 2005, Chapman and KGE Management Limited re-examined drillcore from five of the eight Falconbridge drillholes stored on the property since 1987. The core was reboxed and moved to Salmo and, because the core had never been analyzed previously, was selectively sampled and logged.

In 2006, Valterra Resource Corporation optioned the Swift Katie property. The following year, Valterra compiled historical data, added additional claims and completed an exploration program of reconnaissance mapping and diamond drilling. In late 2007 and early 2008, Valterra contracted Fugro Airborne Surveys Corporation to complete 505 line kilometres of airborne geophysical surveying over most of the Swift Katie property. In 2008, Valterra conducted prospecting over the property. In July 2007, on behalf of Valterra Resource Corporation, Micon International Limited released a National Instrument 43-101 resource report for the property. The following year, the property was optioned to Tosca Mining Corporation.

In 2011, Valterra Resource Corporation completed historical and recent diamond drill collar location, identification, marking and surveying, commissioning Eagle Mapping Limited to complete a 1:2500 scale digital map of the main mineralized zone. By the end of 2011, Valterra Resource Corporation had earned a 100 per cent interest in the Swift Katie property.

A 2-metre trench sample collected from Trench 21 assayed 100.2 grams per tonne gold and 18 grams per tonne silver; another nearby 2-metre-wide sample gave 8.5 grams per tonne gold (Assessment Report 16901, page 13). The high-gold sample consisted of carbonatized tuff and a 0.4-metre-wide quartz vein containing chalcopyrite, galena, pyrite and possibly sphalerite. In 1987, the best results were obtained from holes drilled directly under Trench 19. Drillhole 87-6 encountered 10 metres grading 1.83 grams per tonne gold and 5.4 metres grading 1.45 gram per tonne gold (Assessment Report 17296, page i; Assessment Report 32551, page 10).

In the spring of 2014, Riverside Resources (BC) Inc. completed a soil sampling program of 324 samples across the Swift-Katie property, outlining several gold-in-soil targets to be followed up. Sampling was focused northeast of the Katie showing (MINFILE 082FSW290), and southwest of the Gus (Swift) (this MINFILE) and Ace In The Hole (MINFILE 082FSW350) showings.

Later in 2014, Riverside resources drilled 5 holes (1423 metres), targeting the Swift base and precious metal occurrence. The drill holes tested anomalies over a 1 square kilometre area, with spacing between drill collars ranging between 350 to 900 metres. Drilling encountered a variety of volcanic and intrusive rocks consisting of a succession of rhyolite, andesite, volcaniclastics, diorite, basalt, volcanogenic siltstone and chert, cut by a series of mafic dykes and a distinct feldspar-hornblende porphyry, all representing the Elise Formation in the central part of the Swift Complex. Drilling encountered numerous zones of precious metal mineralization, associated with 5 to 20 centimetre thick sulphide veins containing pyrite, chalcopyrite, and pyrrhotite, with lesser arsenopyrite and galena. Other mineralized zones are commonly associated with andesite-diorite contacts, or zones of structural complexity. Highlights of the drill results include 23.4 grams per tonne gold, 435 grams per tonne silver, and 0.621 per cent copper over 1.5 metres (drill hole SK14-002), and 5.69 grams per tonne gold, 26.6 grams per tonne silver, and 0.128 per cent copper over an adjacent 2 metres (also drill hole SK14-002) (Assessment Report 35407). Riverside Resources returned ownership of the property (100 per cent) back to Valterra Resource Corp. in early 2015.