Muffie, a privately owned dam located in Johnson, Wyoming, serves primarily for irrigation purposes on Burnett Creek. Built in 1970, this earth dam stands at a height of 40 feet and has a storage capacity of 284 acre-feet. Despite its low hazard potential and fair condition assessment, Muffie is regulated by the State of Wyoming and undergoes regular inspections to ensure its structural integrity and safety.

The dam features an uncontrolled spillway and a single slide gate for water release. With a moderate risk assessment rating, Muffie poses a manageable risk to the surrounding area. The dam is situated in a picturesque location, covering 17 acres of surface area and serving as a vital resource for fire protection, livestock, and small fish ponds in the region.

Muffie's importance in sustaining agricultural activities in the area cannot be understated, making it a crucial component of the local water resource infrastructure. Its presence on Burnett Creek contributes to the overall water management efforts in Wyoming, highlighting the significance of private dams like Muffie in supporting irrigation and other essential functions in the region.