Long a symbol of the Canadian Prairies the wooden grain elevator is fast dwindling in numbers. The elevator is a vertical wharehouse that could store 25,000 to 35,000 bushels of grain. Since their first appearance in the 1870's nearly 6,000 were built. Spaced seven to 11 miles apart along the railway lines every prairie village had one or two elevators while towns usually had 3 or more. Many of the grain elevators have been replaced by larger concrete grain holding towers with about a thousand wood elevators remaining on the Canadian prairie.ma 28-70 f2.8, ISO 10