In 1881, construction progressed at a pace too slow for the railway's officials who, in 1882, hired the renowned railway executive William Cornelius Van Horne to oversee construction with the inducement of a generous salary and the intriguing challenge of handling such a difficult railway project. Van Horne stated that he would have of main line built in 1882. Floods delayed the start of the construction season, but over of main line, as well as sidings and branch lines, were built that year. The Thunder Bay branch (west from Fort William) was completed in June 1882 by the Department of Railways and Canals and turned over to the company in May 1883, permitting all-Canadian lake and railway traffic from Eastern Canada to Winnipeg, for the first time in Canada's history. By the end of 1883, the railway had reached the Rocky Mountains, just eight kilometres (five miles) east of Kicking Horse Pass. The construction seasons of 1884 and 1885 would be spent in the mountains of British Columbia and on the north shore of Lake Superior.