Clark No. 1 is a privately owned earth dam located in Niobrara, Wyoming, specifically in the city of Edgemont S D. This dam serves multiple purposes, including fire protection, stock watering, and small fish pond management. Completed in 1956, the dam stands at a height of 27 feet with a hydraulic height of 22 feet, providing a storage capacity of 77 acre-feet. Despite its low hazard potential, the dam is considered to be in fair condition as of the last inspection in November 2019.

Situated on the Clark Draw river, Clark No. 1 plays a crucial role in managing water resources in the region, especially for fire protection and agricultural activities. The dam has a spillway width of 85 feet and a surface area of 5 acres, contributing to its overall functionality. With its proximity to Congressional District 00 in Wyoming, the dam falls under the regulatory jurisdiction of the State Engineer's Office, which oversees its permitting, inspection, and enforcement processes.

For water resource and climate enthusiasts, Clark No. 1 offers a fascinating case study in dam infrastructure and management. As a key water storage feature in the area, the dam's risk assessment reflects a moderate level of concern, prompting the need for ongoing monitoring and maintenance efforts. With its historical significance and continued relevance for local communities, Clark No. 1 exemplifies the intersection of water resource management, environmental stewardship, and public safety in the face of changing climate conditions.