Located in Natrona County, Wyoming, the Petro No. 1 Dam stands as a crucial water resource managed by the Bureau of Land Management. Constructed in 1999, this gravity dam serves a primary purpose beyond just water retention. With a structural height of 27 feet and a hydraulic height of 20 feet, Petro No. 1 Dam holds a storage capacity of 57.04 acre-feet, making it a key component in water management for the surrounding area.

Rising on the unnamed draw, this dam covers a surface area of 3.9 acres and has a drainage area of 0.19 square miles. The dam's spillway type is uncontrolled, with a width of 1 foot, and it has a low hazard potential with a fair condition assessment. Despite its moderate risk rating, Petro No. 1 Dam has undergone regular inspections, with the last one conducted in July 2017. With its strategic location and significant role in water storage, Petro No. 1 Dam remains a vital asset in ensuring water security and climate resilience in the region.

Managed by the Bureau of Land Management, Petro No. 1 Dam plays a crucial role in water management for the city of Midwest and the surrounding areas. With its fair condition assessment and low hazard potential, this gravity dam continues to support various purposes beyond water retention. As climate change impacts water resources, Petro No. 1 Dam stands as a reliable structure in maintaining water security and adapting to evolving environmental conditions.