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Monarch Branch
The Monarch Branch was a branch of the Denver & Rio Grande Western which left the narrow gauge transcontinental route at Poncha Junction a few miles west of Salida, Colorado. The narrow gauge branch built in the 1880s served Colorado Fuel & Iron limestone quarry at Monarch, Colorado. The upper part of the Branch was on a 4.5% grade and included a double switch back to gain elevation to over . In 1956 with the decline of narrow gauge operations out of Salida the line was converted to standard gauge. In 1982 Colorado fuel & Iron closed its blast furnaces at Pueblo and the branch was abandoned.
While the branch was operating it saw a daily train. In later narrow gauge days it the train was worked by K-36s or K-37s. The stone was loaded into narrow gauge wooden gondola cars the stone would be transferred to standard gauge gondola cars via a purpose built rotating 'barrel' at Salida. Once the branch was converted to standard gauge it was worked with 4 axle GP9s and in later days GP30s, GP35s and GP40s. 6 axle SD9s were tested on the branch but derailed due to the tight curves. Diesels assigned to the branch were given modified dynamic brakes to cope with the 4.5% grades.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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