SP&S Class A1

SP&S class A-1^[1]

Type and origin
Power type	Steam
Builder	Manchester Locomotive Works
Build date	July 1907

Specifications
Configuration	0-6-0
Gauge	4 ft 8 ¹⁄₂ in (1,435 mm)
Driver diameter	51 in (1.30 m)
Loco weight	150,000 lbs (68 metric tonnes)
Fuel type	Oil
Boiler pressure	180 lbf/in² (1,723 kPa)
Cylinders	2
Cylinder size	20x26 inches

Performance figures
Tractive effort	31,200 lbf

Career
Operators	Spokane, Portland and Seattle Railway
Class	A-1
Locale	United States

The SP&S Class A-1 steam locomotives were a group of 5 identical locomotives. They were used in the rail yards at Portland, Oregon, and Vancouver, Washington, from 1907 to 1952. They were replaced with diesel-electric switch locomotives.

Background

In 1907, the new SP&S needed equipment for regular operations. Company officials wanted 25 freight locomotives and two switch locomotives to start with.^[2] The president of the Great Northern Railway advised SP&S officials that his railroad could contribute excess engines.^[2] Because of this, only five switch locomotives were purchased for use in the terminal yards in Portland and Vancouver.^[2]

Construction history

All five locomotives in Class A-1 were built by the Manchester plant of American Locomotive Company. Because of the availability of spare parts from the Northern Pacific Railway in Portland, OR, and Pasco and Vancouver, WA,^[2] these locomotives were identical to Northern Pacific class L-9 switch locomotives.^[3]

Operational history

All five locomotives were delivered to the SP&S in February 1908.^[4] They were initially used in work service completing the North Bank line from Portland to Spokane.^[4] Upon completion of the main line, these locomotives were transferred to the terminals for switching service. In late 1942 and early 1943 all 5 locomotives were assigned to the Portland Terminal yards as switch locomotives.^[5] In 1946 locomotive number 2 was sold to the City of Prineville Railway.^[1] With the arrival of SW9 switch engines 43-45 in 1951,^[6] the remaining A-1 class steamers were retired in 1952.

Numbering

These locomotives were numbered 1 to 5

Disposition

Locomotive number 1 was scrapped April 25, 1952. Locomotive number 2 was sold to the City of Prineville Railway and renumbered as their number 7 on July 31, 1946. Locomotive number 3 was scrapped January 24, 1952. Locomotive number 4 was scrapped April 25, 1951. Locomotive number 5 was scrapped January 24, 1952.^[1]

References

1 2 3 Gartner 1990, p. 206.
1 2 3 4 Gartner 1990, p. 14.
↑ Wood & Wood 1974, p. 151.
1 2 Gartner 1990, p. 16.
↑ The Northwest's own Railway. numbers 3 and 4. The Spokane Portland and Seattle Railway Historical Society. 1998. p. 9.
↑ Gartner 1990, p. 70.

Gartner, John T (1990). North Bank Road, The Spokane Portland and Seattle Railway. WSU Press.
Wood, Charles R; Wood, Dorothy (1974). Spokane Portland and Seattle Railway. Superior Publishing Co. p. 151.

Spokane, Portland and Seattle Railway Locomotives

Steam Locomotives

0-8-0:	Class A1 Class A2 Class A3

4-4-0:	Class L-1 Class L-2 Class L-3 Class L-4 Class L-5

4-6-0:	Class D-1 Class D-2 Class D-3 Class D-4 Class D-5 Class D-6 Class D-7

2-6-0:	Class M-1 Class M-2

2-8-0:	Class N-1 Class N-2 Class N-3 Class N-4 Class N-5 Class N-6 Class N-7

2-6-2:	Class F-1

2-8-2:	Class O-1 Class O-2 Class O-3 Class O-4

4-4-2:	Class C-1

4-6-2:	Class H-1

4-8-4:	Class E-1 (700)

4-6-6-4:	Class Z-6 Class Z-8

Diesel Locomotives

Alco:	Alco S-1 Alco S-2 Alco RS-1 Alco RS-2 Alco RS-3 Alco C-415 Alco C-424 Alco C-425 Alco C-636 Alco FA-1 Alco FB-1 Alco FA-2 Alco FB-2

EMD:	EMD NW-2 EMD SW-9 EMD GP-9 EMD E-7A EMD F-3A EMD F-7A

Baldwin:	BLW VO-1000

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