CN U-1-a and U-1-b

On 1 September 1947, locomotive 6001 was involved in the Dugald rail accident. It collided with another CN 4-8-2 numbered 6046.  6001 was later rebuilt by CN. On 21 November 1950, locomotive 6004 was severely damaged a head-on collision with S-2-a 2-8-2  3538 at Canoe River, British Columbia. It was scrapped in June 1951 (as was the 3538). There was a gap of four years before the next U-1-a or U-1-b went: two were scrapped in 1955, four in 1957, six in 1958, six in 1959, eight in 1960, seven in 1961, and the last two, 6000 and 6001 in 1962. ==In art==

U-1-a 6004 is the subject of a 1924 publicity poster by C. Norwich. It depicts the locomotive speeding along in the foreground, while in the background is a pine-covered, snow-capped mountain peak. Across the top is the "Canadian National Railways" logotype; across the bottom are the words, "Across Canada", and in the lower left, above the artist name and date is "The Continental Limited in the Canadian Rockies" ==Preservation==

One locomotive has been preserved: • CN 6015 (U-1-a) — Retired 1960; to CHRA, Delson, Quebec. On public display in Jasper, Alberta, since July 1972. ==References==