Spokane, Portland & Seattle 2-8-2 "Mikado" Type Locomotives

Introduction

The Spokane, Portland & Seattle Railway was owned jointly by the Northern Pacific and the Great Northern and was never permitted to build steam locomotives of its own design. Instead, it received most of its motive power used, as hand-me-downs from its parents, or as add-ons to one of its parents' orders. The SP&S operated twenty-six "Mikado" type locomotives which were all obtained second-hand. Eleven came from the NP and the other fifteen came from the GN. The first four to arrive were three from the GN which were given road numbers 500 through 502 and one from the NP which was numbered 525. These four locomotives were added to the SP&S roster in 1925. Over the next twenty-five years the other twenty-two arrived, with numbers 550 and 551 coming last in 1950.

There is one surviving SP&S 2-8-2 "Mikado" type locomotive. It is number 539, former NP number 1762 that was transferred to the SP&S. This locomotive was retired from the SP&S and is currently stored at Grand Canyon Railway in Williams, AZ.

Roster by Richard Duley

ClassQty.Road NumbersForm Other RRYear AcquiredYear BuiltBuilderNote
O-113500-512GN1925-19441913-1918Baldwin1
O-2 1525NP19251910ALCO2
O-310530-539NP1926-19441913-1917ALCO3
O-4 2550 & 551GN19501920Baldwin4
Notes:
  1. Came from the GN between 1925 and 1944 (Ex GN numbers 3026, 3028, 3029, 3099, 3039, 3043, 3023, 3024, 3064, 3121, 3122, 3108 & 3134 in that order). Numbers 507 & 509 scrapped in 1945. Numbers 500, 503, 504, 508, 510 &511 scrapped in 1949. Numbers 501, 505 & 506 scrapped in 1951. Number 502 scrapped in 1952. Number 512 sold in 1949.
  2. Came from the NP in 1925 (Ex NP number 1698). Number 525 scrapped in 1947.
  3. Came from the NP between 1926 and 1944 (Ex NP numbers 1765, 1704, 1727, 1744, 1747, 1701, 1726, 1723, 1751 and 1762 in that order). Numbers 531, 532 & 535 scrapped in 1953. Numbers 530, 533, 534 & 537 scrapped in 1954. Numbers 536 & 538 sold in 1957. Number 539 survives and is on display Battle Ground, WA.
  4. Came from the GN in 1950 (Ex GN numbers 3211 & 3214). Numbers 550 and 551 scrapped in 1953.


Specifications by Richard Duley
ClassO-1O-1O-2O-3O-4
Road Numbers:500-502 504-508503 509-512525530-539550-551
Wheel Arrangement:2-8-22-8-22-8-22-8-22-8-2
Length:77'-0 1/2"77'-0 ½"80'-6" 77'-0 ½"83'-2"
Drivers:63" dia.63" dia.63" dia.63" dia.63" dia.
Weight on Drivers:220,000 lbs.229,000 lbs.208,900 lbs.247,000 lbs.242,800 lbs.
Total Locomotive Weight:280,000 lbs.306,500 lbs.269,600 lbs.337,000 lbs.319,700 lbs.
Locomotive & Tender Weight:434,100 lbs.460,600 lbs.461,400 lbs.551,000 lbs.516,500 lbs.
Grate Area:78.0 sq. ft.78.0 sq. ft.43.5 sq. ft.70.3 sq. ft.78.0 sq. ft.
Cylinders:(2) 28" x 32"(2) 28" x 32"(2) 25" x 30"(2) 28" x 30"(2) 28" x 32"
Boiler Pressure:210 psi210 psi200 psi180 psi210 psi
Tractive Effort:71,083 lbs.71,083 lbs.50,595 lbs.57,120 lbs.71,083 lbs.
Tender Capacity:
Water:8,000 gals.8,000 gals.10,000 gals.10,000 gals.10,000 gals.
Coal in tons/Oil in gals:13 tons13 tons19 tons16 tons20 tons

Photos

Reference

Credits

Introduction and roster provided by Richard Duley. Class details and specifications provided by Steve Llanso of Sweat House Media.