Scope and Contents The Missouri River Aerial Photograph Collections contains 737 glass plate negatives, each 21 x 16 cm. Although there was no identification included with these negatives; painstaking research has determined that the series of images cover an area of the Missouri River Valley affected by the building of Garrison Dam and subsequent creation of Lake Sakakawea. All images were taken prior to the dam’s construction. Each negative has a number printed on the upper right corner, all of which start with...