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Pathfinder to Guernsey Subbasin Overview


The Pathfinder to Guernsey subbasin is the second largest of the seven Platte River Basin subbasins that are located in Wyoming. The total area of this subbasin is approximately 5,600 square miles. Most of the subbasin is located within Natrona, Converse, and Platte Counties. The main stem of the North Platte River flows through this subbasin. Communities located within this subbasin include Casper, Glenrock, Douglas, and Guernsey. Alcova Reservoir, Glendo Reservoir, and Guernsey Reservoir are major North Platte River federal reservoirs that are located within this subbasin.

Additional information and maps of the Pathfinder to Guernsey subbasin can be accessed by using the menu displayed on the left or the navigational menu displayed on the top of this page.


The Platte River Basin Plan is a planning tool developed for the Wyoming Water Development Office. It presents estimated current and estimated future uses of water in WyomingĂs Platte River Basin. The Plan is not used to determine compliance with or administration of state law, federal law, court decrees, interstate compacts, or interstate agreements.
Wyoming Water Development Commission
6920 Yellowtail Road
Cheyenne, Wyoming 82002
Ph. (307) 777-7626
Fax (307) 777-6819