The Irrigation Photograph Collection contains lantern slides and glass plate negatives related primarily to irrigation and agricultural subjects in Colorado and around the world which were used for the instruction of Colorado Agricultural College (CAC) irrigation engineering students. Colorado locations include the CAC campus, the Grand Valley, the San Luis Valley, and the Eastern Plains. For more information see the finding aid.

This digital collection, with materials dated 1896 to 1906, includes all images scanned from nitrate negatives and approximately half of those scanned from glass plate negatives. Topics covered are Colorado irrigation and agriculture.

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