Guernsey, located in Platte, Wyoming, is a federal-owned dam along the North Platte River with a primary purpose of hydroelectric power generation and irrigation. Built in 1926, this earth dam stands at 135 feet high and has a storage capacity of 45,612 acre-feet. With a surface area of 2,380 acres and a drainage area of 15,008 square miles, Guernsey plays a crucial role in water resource management in the region.

Managed by the Bureau of Reclamation, Guernsey has undergone structural modifications in 1984 and 2016 to ensure its safety and functionality. The dam is equipped with a controlled spillway and tainter gates for water release, with a high hazard potential due to its location and design. Despite its age, the condition assessment of Guernsey is currently not available, highlighting the need for ongoing monitoring and maintenance to safeguard against potential risks and ensure its continued operation for both hydroelectric power generation and irrigation purposes.

With Liz Cheney (R) as the congressional representative for the area, Guernsey remains a vital component of the water infrastructure in Wyoming. As a key player in regulating and inspecting the dam, the Bureau of Reclamation is responsible for its operations and ensuring compliance with state regulatory agencies. Water resource and climate enthusiasts can appreciate the engineering feats and environmental impact of Guernsey, a historic structure that continues to serve the community while facing challenges of aging infrastructure and evolving safety standards in the face of climate change.