When the elevator system in the Gateway Arch in St. Louis needed to be reconditioned, the engineering firm that won the contract approached PEM for a quote. They subcontracted all the necessary manufacturing operations, and PEM was hired to produce gearboxes to drive the pulley system for the elevators. Due to delays with other manufacturers, PEM received other projects as well and the initial order ended up being four times more than expected.

Specialized load testing took place at Power Engineering and Mfg.