Kiewit Herbs Creek No. 1, also known as Herb's Creek Dam No. 1, is a privately owned earth dam located in Sheridan, Wyoming. Completed in 1967, this dam serves primarily for irrigation purposes, with a storage capacity of 98 acre-feet. Situated on the Herb Creek, a tributary of Gay Creek, the dam stands at a height of 44 feet and has a length of 425 feet, providing water resources for a drainage area of 3.3 square miles.

With a low hazard potential and fair condition assessment, Kiewit Herbs Creek No. 1 is regulated by the State of Wyoming, with inspections and enforcement carried out by the State Engineer's Office. The dam features an uncontrolled spillway with a width of 50 feet and an outlet gate for water control. Despite its moderate risk assessment, the dam has not undergone any modifications in recent years and has an inspection frequency of 5 years to ensure its continued functionality.

Water resource and climate enthusiasts will appreciate the role of Kiewit Herbs Creek No. 1 in providing water for irrigation, fire protection, and wildlife habitat in the region. Its location in the scenic surroundings of Sheridan, Wyoming, and the moderate risk it poses make it a significant structure for water management and conservation efforts in the area.