Southern Pacific Railroad (SP) 2355 is one of 10 heavy 4-6-0 'Ten Wheel' steam locomotives built by Baldwin Locomotive Works in 1912, designated the T-31 class. 2355 was retired from service in 1957 and was converted to a static display at Pioneer Park in Mesa, Arizona. The locomotive was fenced off for safety concerns in the 1990s. Since 2008, efforts have been underway to relocate 2355 within Pioneer Park and perform cosmetic restoration. Restoring the locomotive to a running state from its current condition is deemed to be cost-prohibitive.