Johnson No. 1, also known as Golden Eye Reservoir, is a private water resource located in Natrona, Wyoming. This reservoir was completed in 1914 and serves primarily for irrigation purposes, with a storage capacity of 12,351 acre-feet and a surface area of 700 acres. The dam, standing at a height of 20 feet, is classified as an Earth dam with a stone core and soil foundation.

Despite its low hazard potential and fair condition assessment, Johnson No. 1 is regulated and inspected by the state of Wyoming, demonstrating a commitment to ensuring its safety and functionality. The reservoir is situated offstream from Middle Casper Creek and is equipped with a slide gate outlet for water release. Its spillway, uncontrolled in type, has a width of 300 feet to manage excess water flow during periods of high rainfall or snowmelt.

With a moderate risk assessment score of 3, Johnson No. 1 remains a vital water source for the region, supporting various purposes such as fire protection, stock, and water supply. Its location in Casper, Wyoming, and its historical significance as a key irrigation infrastructure underscore its importance in managing water resources and mitigating the impacts of climate variability in the area.