Irrigation ditch along the road. Imperial Valley, California; Lange, Dorothea, photographer; 1937 Feb.
Lange’s justly famous for her pictures of the people of the Imperial Valley when she travelled there in the late 1930s as a documentarian for the Farm Service Administration. She also took pictures of water. If you want to get lost for an hour or two, the Library of Congress has quite a collection on line.
Great find here John. Suddenly, I have several hours to peruse these photos.