Located in Johnson, Wyoming, Will No. 1 is a private dam designed by John A. Lambert in 1991 for purposes including fire protection, stock, and small fish ponds. With a dam height of 30 feet and a hydraulic height of 25 feet, this earth dam spans 410 feet in length and has a maximum storage capacity of 302 acre-feet. The dam sits on the WILL DRAW river/stream and serves as a low hazard structure with a fair condition assessment.

Despite being privately owned, Will No. 1 is regulated and permitted by the State of Wyoming's SEO agency, with regular inspections and enforcement to ensure compliance with safety standards. The dam has a spillway width of 55 feet and a maximum discharge capacity of 3360 cubic feet per second. Its moderate risk assessment rating indicates a need for ongoing risk management measures to prevent any potential hazards or emergencies.

With its primary purpose being fire protection, stock, and small fish ponds, Will No. 1 plays a crucial role in water resource management in the area. As a key structure in the region, it highlights the intersection of water resource management and climate resilience, showcasing the importance of maintaining and regulating dams to ensure the safety and sustainability of water resources for future generations.