grain elevator

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A building equipped with mechanical lifting devices and used for storing grain.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun agriculture, North America A large structure for the storage of grain. It is more specialized than a regular granary in that in uses an elevating mechanism to hold the grain in one of many different bins, and that it it designed to fill large trucks and train cars for shipping grain in bulk.