Fitted with a slightly larger boiler than the the 8-9 that preceded it (Locobase 12459), the 10 served the McCloud for more than 3 decades. In June 1935, the 10 went to the Yreka Western, where it operated until scrapped in 1944.
These superheated oil-burning logging Prairies had a useful amount of superheater area. Their cylinders were served by 9 1/2 in (241 mm) piston valves.
The pair served the McCRR for over thirty years before being retired. They were sold for scrap on 23 November 1955. McCRR Prairies 22-23 were Alcos delivered in 1925 with the same power dimensions and engine weight.
Logging railroads such as the McCloud River needed locomotives with several axles to spread the weight over lightly built right of way. Thus the Prairie arrangement, often seen as an express passenger layout, appeared on dozens of logging engines. The Baldwin specs for this pair noted that they were to face ruling grades of 4% and curves of 383-ft (10-deg) curvature.
The 8 remained with the McCloud River until January 1939, when it was sold to the Amador Central as their #7. The 9 went to the Yreka Railroad (later the Yreka Western) in 1930. It joined the 7 on the AC in January 1940. Tom Correa sent an email to steamlocomotive.com in December 2012 telling us that the 7's nickname on the AC was "Iron Ivan".
Gene Connelly's list shows that Iron Ivan remained on the AC until December 1960, when it was donated to the California Chamber of Commerce, which put it on display outside of a police station.
9 took a different route, leaving the AC in April 1944 to work for the Nezperce & Idaho, a Lewiston, Ida based shortline that began as the Lewiston, Nezperce & Eastern in 1908 and was reorganized as the N&I in 1917. Its main line linked Craigmont to Nezperce 13.4 miles (21.6 km) away. (See "It's a short line, but a long story" published originally in the Lewiston Morning Tribune in 1961 and archived at http://apps.itd.idaho.gov/Apps/MediaManagerMVC/NewsClipping.aspx/Preview/58584 . and Dan Butler "Railroads of the Camas Prairie,"The Pacific Northwest Forum
Volume 8, Numbers 2-3 (Spring-Summer, 1983), Pages 39-48), archived at http://www.narhist.ewu.edu/pnf/articles/s1/viii-2-3/camus%20prairie/camasprarie.html).
The Nezperce sold the 9 to Richard Hinebaugh in January 1966, who included it on the roster of the Kettle Moraine Railway in North Lake, Wisconsin. Known as the Sequoia, , the 9 operated until it boiler ran out of time in 2001. The 9 was donated to the National Railroad Museum in Green Bay, Wisc. in 2003.
|Specifications by Steve Llanso of Sweat House Media|
|Railroad||McCloud River||McCloud River||McCloud River|
|Number in Class||1||1||2|
|Builder||Burnham, Williams & Co||Baldwin||Burnham, Williams & Co|
|Locomotive Length and Weight|
|Ratio of driving wheelbase to overall engine wheebase||0.32||0.38||0.32|
|Overall Wheelbase (engine & tender)||47.54'||52.48'|
|Axle Loading (Maximum Weight per Axle)|
|Weight on Drivers||82000 lbs||106000 lbs||82000 lbs|
|Engine Weight||107000 lbs||132000 lbs||107000 lbs|
|Tender Light Weight||50000 lbs||86000 lbs||50000 lbs|
|Total Engine and Tender Weight||157000 lbs||218000 lbs||157000 lbs|
|Tender Water Capacity||2500 gals||4000 gals||2500 gals|
|Tender Fuel Capacity (oil/coal)||1800 gals||gals|
|Minimum weight of rail (calculated)||46 lb/yard||59 lb/yard||46 lb/yard|
|Geometry Relating to Tractive Effort|
|Boiler Pressure||160 psi||185 psi||160 psi|
|Cylinders (dia x stroke)||16" x 24"||17" x 24"||16" x 24"|
|Tractive Effort||18991 lbs||23711 lbs||18991 lbs|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.32||4.47||4.32|
|Firebox Area||122.70 sq. ft||104 sq. ft||114 sq. ft|
|Grate Area||16 sq. ft||21 sq. ft||16 sq. ft|
|Evaporative Heating Surface||1562 sq. ft||1342 sq. ft||1499 sq. ft|
|Superheating Surface||292 sq. ft|
|Combined Heating Surface||1562 sq. ft||1634 sq. ft||1499 sq. ft|
|Evaporative Heating Surface/Cylinder Volume||279.68||212.85||268.39|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||2560||3885||2560|
|Same as above plus superheater percentage||2560||4584||2560|
|Same as above but substitute firebox area for grate area||19632||22703||18240|