1. Great Power Dams and Locks in the Mississippi River, Keokuk, Iowa. Date: 1890-1899, 1900-1909, and 1910-1919 Description: Title and "170 (16700)" on label.
2. Electric Generators, Power Plant, Keokuk, Iowa. Date: 1890-1899, 1900-1909, and 1910-1919 Description: View of generators inside a dam at Keokuk, Iowa. Title and "171 (16701)" on label.
