Great Northern Steam Locomotive 3356, a Class O-6, a 2-8-2, rebuilt by Great Northern in 1925-1926 from Mallet Number 1921, 28"x32" cylinders, 63" drivers, 200 psi steam pressure, 320,100 pounds weight, 67,700 pounds tractive effort, Hillyard, Washington. A David Emerson photo taken in 1934-1935.

Great Northern Steam Locomotive Number 3352 at Hillyard, Washington, 1935.

Great Northern Steam Locomotive 3352, a Class O-6, a 2-8-2, rebuilt by Great Northern Delta Shops in Everett, Washington in August 29, 1925 from W-1 Number 1919, Hillyard, Washington. A David Emerson photo taken in 1934 or 1935.

Great Northern Steam Locomotive Number 3351 at Hillyard, Washington, 1935.

Great Northern Steam Locomotive Number 3350 at Hillyard, Washington, 1935.

Great Northern Steam Locomotive 3350, a Class O-6, a 2-8-2, rebuilt by Great Northern Shops in 1925-1926 from Number 1910 Mallet, 28"x32" cylinders, 63" drivers, 200 psi steam pressure, 320,100 pounds weight, 67,700 pounds tractive effort, Hillyard, Washington. A David Emerson photo taken in 1935.

Great Northern Steam Locomotive Number 3309 at Hillyard, Washington, 1935.

Great Northern Steam Locomotive 3309, a Class O-5, a 2-8-2, rebuilt by Great Northern in 1922-1925 from Number 1810 Mallet, 25"x30" cylinders, 63" drivers, 200 psi steam pressure, 283,420 pounds weight, 50,000 pounds tractive effort, Hillyard, Washington. From the David Emerson Collection, a Maynard Rikerd photo taken in 1934 or 1935.

Great Northern Steam Locomotive 3399, a Class O-8, a 2-8-2, built by Great Northern in 1932, 29"x32" cylinders, 69" drivers, 250 psi steam pressure, 367,000 pounds weight, 78,000 pounds tractive effort, the last engines built in Hillyard Shops and only one of only three steam locomotives built for an American railroad in 1932, heaviest and most powerful 2-8-2 locomotives built in America, the 25 locomotives in the Class O-7 were rebuilt too Class O-8 standards in the later 1930s at Hillyard, Washington. From the David Emerson Collection, a Maynard Rikerd photo taken in 1932.

Great Northern Steam Locomotive Number 3305 at Hillyard, Washington, 1937.