Lake Placid Olympic Ski Jumping Complex

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https://roadtrippers.com/places/lake-placid-olympic-jumping-complex-lake-placid/104933

The Lake Placid Club built the first ski jump on this site in 1917, using the hillside itself as the jump surface. The next year, the first tower constructed of wood, and the jump enlarged to 35 meters. In 1921, a major competition was held which drew close to 2000 spectators, many arriving via a special train; the record jump was 124 feet.

In 1923, the jump was enlarged to fifty meters, and in 1927, a new steel tower was built, raising the jump to 60 meters. In 1928, the tower was raised to 75 meters; this was the tower used for the 1932 Winter Olympic Games. In 1977, the old tower was demolished to make way for new 70 and 90-meter jumps, used for the 1980 Winter Olympic Games. In 1994, the landing hills were re-graded to bring the jumps into compliance with current rules, and increasing their height to 90 and 120 meters.

The towers were built using a jacking system that lifted and poured concrete into the forms continuously, night and day, for 15 days for the larger jump, and 9 days for the smaller one. The present record jumps stand at 105 meters for the 90-meter jump, set by Andrew Osadetz of Canada, and 135.5 meters for the 120-meter jump, set by Veli-Matti Lindström of Finland.