Clinchfield Heavy Challenger

The Clinchfield Railroad Heavy Challenger were a class of 4-6-6-4 "Challenger" Steam locomotives with only six examples built.
==History==
The Clinchfield Railroad Heavy Challenger were a class of 4-6-6-4 "Challenger" Steam locomotives with only six examples built in 1943 by the American Locomotive Company (ALCO). However, the War Production Board diverted these six locomotives after completion to the Denver and Rio Grande Western Railroad via a lease through the War Department's Defense Plant Corporation, then the Denver and Rio Grande Western Railroad had designated/classified them as L-97. These six were later sold to Clinchfield Railroad in 1947 and were renumbered as 670-675, where they were redesignated/reclassified by the Clinchfield Railroad as their Class E-3.
==Disposition==
Withdrawal of the class began and although Union Pacific Heavy Challenger Nos. 3977 and 3985 survived beyond the days of steam, None of the Clinchfield Heavy Challengers were Preserved, All six of the Clinchfield Heavy Challengers were broken up for scrap.
==Trivia==
*Despite all six of the Clinchfield Heavy Challengers being scrapped, Union Pacific Heavy Challenger #3985 masqueraded as the next Clinchfield Heavy Challenger #676 to resurface the legacy of the Clinchfield Heavy Challengers.
==Stock list==
Loco No.	Image	Build date	Manufacturer
670 	 	1943 	American Locomotive Company (ALCO)
671 	 	1943 	American Locomotive Company (ALCO)
672 	 	1943 	American Locomotive Company (ALCO)
673 	 	1943 	American Locomotive Company (ALCO)
674 	 	1943 	American Locomotive Company (ALCO)
675 	 	1943 	American Locomotive Company (ALCO)
Category:Scrapped locomotives
Category:4-6-6-4 locomotives
Category:4-6-6-4 steam locomotives
Category:Tender locomotives
Category:Clinchfield Locomotives
Category:Steam locomotives
Category:Locomotives
Category:Standard gauge locomotives
Category:ALCO locomotives
Category:Built in 1943
Category:Articulated locomotives
Category:Scrapped steam locomotives
Category:Standard gauge locomotives of the United States
Category:4 foot 8 1⁄2 inch gauge