Allis Chalmers Engineering original vintage advertisement. With
focus on Allis Chalmers crawler tractors and hydraulic turbines
used in the massive St. Lawrence Seaway project. Super waterway
to the sea with 2.2 million horsepower and the Barnhart Island
power dam, world's second largest. Stairway to the sea shows
how water from the Great Lakes drops 602 feet to sea level.