Alvie No. 1, located in Lambert, Albany County, Wyoming, is a private-owned Earth dam completed in 1974 for the primary purpose of creating a Fish and Wildlife Pond while also serving as a Flood Risk Reduction structure. The dam stands at a height of 38 feet with a hydraulic height of 25 feet and a structural height of 35 feet. It has a length of 348 feet and can store up to 16 acre-feet of water, covering a surface area of 2 acres. The drainage area for Alvie No. 1 is 1.1 square miles, with a maximum discharge capacity of 163 cubic feet per second.

Despite its low hazard potential, Alvie No. 1's condition assessment is rated as poor, with the last inspection conducted in August 2020. The dam's spillway type is uncontrolled, with a width of 21 feet and an outlet gate consisting of a slide (sluice gate). The risk assessment for this structure is moderate, highlighting the need for ongoing risk management measures. With its critical role in providing habitat for fish and wildlife, as well as mitigating flood risks, Alvie No. 1 is a significant water resource feature in the region, demanding attention and proactive maintenance to ensure its continued functionality and safety for the surrounding community and environment.