Anna is a private earth dam located in Wyoming, specifically in Johnson County near Indian Creek Ranch. Built in 2007 for the primary purpose of irrigation, Anna stands at a structural height of 38 feet and has a storage capacity of 73 acre-feet. This dam on Kashmir Creek is regulated by the state and is subject to inspection, enforcement, and permitting by the Wyoming State Engineer's Office (SEO) and Department of Environmental Quality (DEQ).

With a low hazard potential and fair condition assessment, Anna poses a moderate risk according to a rating of 3. The dam has a spillway width of 30 feet and a maximum discharge capacity of 1436 cubic feet per second. It has one valve outlet gate and is designed to serve irrigation, fire protection, stock, and small fish pond purposes. Despite its relatively small size, Anna plays a crucial role in water resource management in the area and contributes to the sustainability of the surrounding ecosystem.

The last inspection of Anna took place in June 2017, with a scheduled inspection frequency of 5 years. The dam's emergency action plan status and risk management measures are not specified, but with its current condition and regulatory oversight, Anna continues to provide essential water storage and management services to the local community and ecosystem. For water resource and climate enthusiasts, Anna serves as a fascinating case study in sustainable water infrastructure development and management in the western United States.