Pathfinder Dam - Credit: Wikimedia Commons
Pathfinder Dam is a masonry dam, located on the North Platte River, approximately southwest of Casper, Wyoming. It was originally constructed from 1905 to 1909 as part of the North Platte Project and has been modified several times since then. It is included on the National Register of Historic Places. Construction of the dam created Pathfinder Reservoir which provides water storage for of irrigation in Wyoming and Nebraska. The dam is named for General John Charles Fremont, who had explored the area in 1842 and was nicknamed the "Pathfinder of the West." Read more on Wikipedia
Source: en.wikipedia.org