In 1926, 20 suffered freeze damage to its bridges when a hostler accidentally left it outside overnight, necessitating its return to Baldwin for repairs.

It was placed in heated undercover storage pending further development for the next six years; at one point it was hoped the engine would be put on public display in Kenilworth, New Jersey, but space surrounding the railroad was limited.

[1] It was donated to F. Nelson Blount in May 1959 and was received at Wakefield, Massachusetts on June 5 that year.

15's last run was on August 12, 1973, when a boiler tube blew out, scalding Andy Barbera, who was operating as the locomotive engineer at the time.

The Steamtown Special History Study recommended that the engine be cosmetically and operationally restored, as it had served in the northeastern quarter of the United States and had been serviced, at least once, at the Lackawanna's Scranton shop.