Phil No. 1 is a privately owned dam located in Niobrara, Wyoming, specifically in the city of EDGEMONT S D. Completed in 1966, this earthen dam serves multiple purposes including fire protection, stock watering, and as a small fish pond. With a structural height of 35 feet and a hydraulic height of 30 feet, this dam has a storage capacity of 83 acre-feet and covers a surface area of 5 acres. The dam is situated on the Phil Draw river and is regulated by the State of Wyoming, with inspections conducted every 5 years to ensure its fair condition and low hazard potential.

Managed by the Wyoming State Energy Office, Phil No. 1 features an uncontrolled spillway with a width of 50 feet and an outlet gate for water release. The dam is designed to handle a maximum discharge of 0 cubic feet per second and has a drainage area of 0 square miles. The risk assessment for this structure is rated as moderate (3), indicating a need for ongoing monitoring and risk management measures. The dam is located in Congressional District 00, Wyoming, represented by Liz Cheney (R), and falls under the jurisdiction of the Omaha District of the US Army Corps of Engineers.

Overall, Phil No. 1 is a vital water resource in Wyoming, providing essential services for fire protection, livestock watering, and recreational fishing. With its fair condition and low hazard potential, this dam plays a crucial role in the local ecosystem and contributes to the sustainable management of water resources in the region. Ongoing inspections and risk assessments ensure the safety and functionality of this structure for the benefit of the surrounding community and the environment.