|Waters. Here is an original telephoto view that I took of a Pennsylvania Railroad train in Altoona, Pennsylvania, during mid-February of 1966. Shown here (R to L) are PRR engines #8663, an unidentified unit, and #8674. All are AS-18AM's built by the American Locomotive Company in 1958 and rated at 1,800 horsepower each. They are pulling a fully-loaded coal train past SLOPE Tower, under the 24th Street Bridge, and up the Allegheny Mountains to Gallitzin and points West. This photo taken from the steps of SLOPE Tower.