Browse Items (17 total)

Willard Robinson drop spillway structure in Delaware County, Iowa.

Aerial photos of waterways in Indianola, Iowa.

Sectional map of the state of Iowa, compiled from the United States surveys also exhibiting the internal improvements, distances between towns & villages, lines of projected rail roads &c. &c.; drawn and published by Guy H. Carleton, Dep. Sur. U.S.

Aerial color photograph of M. Yeager waterways.

Hoffman/Broghammer concrete drop spillway structure in Delaware County, Iowa. Built in 1959, the reinforced drop spillway structure of "Island Type" serves as the tile outlet for 8" and 12" tiles and as a waterway stabilizer. The waterway was started…

Hoffman/Broghammer concrete drop spillway structure in Delaware County, Iowa. Built in 1959, the reinforced drop spillway structure of "Island Type" serves as the tile outlet for 8" and 12" tiles and as a waterway stabilizer. The waterway was…

Photo of the grassed waterway on the Bumann farm in Cherokee County, Iowa.

Before and after pictures of the work done at the FFA Field Day on Lloyd Jones' farm in West Lincoln Township; Warren County, Iowa.

Article on the use of grass waterways to prevent soil erosion.

Photo of erosion damage, and waterway needs in a field in Cherokee County, Iowa.