This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
huntsville state park huntsvillestatepark texas state parks texasstateparks civilian conservation corps civilianconservationcorps ccc sketch drawing text texture Dam spillway including curb at top of spillway bank slab typical section of pilot channel retaining wall sections spillway location plan topography. Specific date Draftsman