> In 1929, Clifford Thomson, then employed by the Canadian Bank of Commerce and also treasurer of the hockey association, solved the problem of the library's stock of film and the inadequate ice rink. Thomson took 500,000 feet of film and stacked the reels in the pool, covered the reels with boards and leveled the rink with a layer of earth. The DAAA continued to receive new nitrate films which would later fuel the destruction of the entire complex in a fire in 1951. The films stored under the ice rink were preserved by permafrost and were later uncovered in 1978 when a new recreation center was being built.
https://en.wikipedia.org/wiki/Dawson_Film_Find
> In 1929, Clifford Thomson, then employed by the Canadian Bank of Commerce and also treasurer of the hockey association, solved the problem of the library's stock of film and the inadequate ice rink. Thomson took 500,000 feet of film and stacked the reels in the pool, covered the reels with boards and leveled the rink with a layer of earth. The DAAA continued to receive new nitrate films which would later fuel the destruction of the entire complex in a fire in 1951. The films stored under the ice rink were preserved by permafrost and were later uncovered in 1978 when a new recreation center was being built.