Narrow gauge classic By Angela Cotey | July 20, 2019 | Last updated on August 7, 2025 Email Newsletter Get the newest photos, videos, stories, and more from Trains.com brands. Sign-up for email today! Get Updates Denver & Rio Grande Western K-28 class narrow gauge 2-8-2 No. 474 steams at Gunnison, Colo., in 1940. The railroad had 10 such locomotives, Nos. 470-479, built by Alco in 1923. They were retired in 1946. R.H. Kindig photo