69 



Kilometres main distributing centre for the Kootenay and 

 Boundary districts. The city is underlain by 

 granitic rocks of the Nelson batholith near the 

 northern edge of an area of the rocks of the 

 Rossland group [4]. The latter also appear in 

 small isolated patches throughout the main area 

 underlain by the batholith. The ore deposits 

 are all later than the intrusion of the grano- 

 diorite batholith (Jurassic?) and younger than 

 the last evidences of igneous activity which 

 form a system of lamprophyric dykes cutting 

 and faulting the ore bodies. The country in the 

 vicinity of Nelson is rather widely mineralized, 

 the principal deposits being gold-silver, silver- 

 copper, silver-lead and copper-gold-silver. The 

 chief mines working at present are the Granite- 

 Poorman (gold). Silver King (silver-copper), 

 Molly Gibson (silver-lead), and the Eureka and 

 Queen Victoria (copper-gold-silver). The total 

 production of the mining division to the end 

 of 191 1 amounts to rather more than $10,700,000 

 in value. 

 10-8 m. Bonnington Falls — Alt., 1,658 ft. (505 m). 

 17 km. Four miles (6-4 km.) west of Nelson the railway 

 crosses to the north side of Kootenay river. 

 The Kootenay from Granite to Castlegar (22 

 miles or 35 km.), where it joins the Columbia, 

 has a fall of 335 feet (102 m.), and is characterized 

 by swift-flowing reaches, falls and rapids. The 

 most important falls are at Bonnington, where 

 it is estimated that under a 40-foot head 267,000 

 H.P. can be developed at low water. At present 

 there are two plants, the West Kootenay Power 

 and Light Company with 20,000 H.P. developed, 

 and the City of Nelson power plant developing 

 2,350 H.P. The former company supplies 

 power and light to various points in West 

 Kootenay and the Boundary districts, parti- 

 cularly to the mining and metallurgical centres 

 at Trail, Rossland, Grand Forks, Phoenix and 

 Greenwood. 

 12 m. South Slocan — Alt., 1,637 ft. (499 m.). South 



19 km. Slocan is the junction point from which a branch 

 railway runs to Slocan city and Slocan lake in 



